FORM 2
THE PATENTS ACT 1970
(39 of 1970)
AND
The Patents Rules, 2003
COMPLETE SPECIFICATION
(See section 10 and rulel3)
TTlTLE OF THE INVENTION:
"AUTOMATED ASSEMBLY MACHINE FOR INTEGRAL SHAFT BEARING"
2. APPLICANT:
(a) NAME: RING PLUS AQUA LTD.
(b) NATIONALITY: Indian Company incorporated under the Companies Act, 1956
(c) ADDRESS: Shaft Bearing Division, A-16/17, STICE, At post. Musalgaon,
Tal.Sinnar, Dist. Nashik - 422112, State -Maharashtra, India.
3. PREAMBLE TO THE DESCRIPTION:
The following specification describes the invention and the manner in which it is to be performed.

FIELD OF INVENTION:
This invention relates to the development of a unique process design on two indexing tables, for assembly of integral shaft bearing used in water pumps and alike. More particularly, the present invention relates to an automatic assembly machine to reduce human intervention and supervisory control.
BACKGROUND AND PRIOR ART:
Integral shaft bearings are ready to fit bearing units which are used in wide applications such as water pumps, electric fans, vane pumps, electric motors etc. An integral shaft bearing consists of a shaft supported by two rows of bearings in an outer ring. The bearings are greased for life and protected against environmental degradation by the use of sealing rings.
]n conventional process of integral shaft water pump bearing assembly, human intervention results into faulty assembly, higher rejections, lower productivity, thus reduced operational efficiency. The bearing assembly starts with grading of shaft & sleeve, wherein races are held in between pins, connected to LVDT probe, which gives directly the size/grade of shaft/sleeve,
After grouping of shafts and sleeves, the appropriate ball size is determined with reference to a standard chart, based on the required radial clearance of a bearing. Then shaft is inserted on the fixture vertically & sleeve placed on the shaft manually, after this chosen grade of ball with required quantity are poured inside the gap between shafts and sleeve manually. Further, a spacer i.e. tool with teeth at its head, is used to separate the balls from each other and to space them equally. Then a cage is inserted on balls & fixed over the balls to keep them separated. Once the ball cage is inserted, a roller cage is inserted on another side of shaft, sleeve & ball cage assembly manually.
Further, the partial assembly is taken to next station for radial and axial clearance measurement. In this operation, operator at a time holds the sleeve and pushes shaft axially to measure axial clearance and alternately holds the shaft and pushes the sleeve radially to measure radial clearance on the dial indicator. Variation in the applied force on shaft/sleeve by different operators conflicts the measurement of axial & radial clearance.

Thereafter the partial assembly is offered to grease filling station where grease is filled from top and bottom side of the assembly. The grease dispensing is from grease reservoir through a grease pump. After greasing cycle, operator lifts the grease filled bearing and inserts the seals from both sides and keeps it below seal press where seals are pressed. Thereafter, spinning operation is done with insertion of this assembled bearing into rubber gripper, which is coupled with 1400 RPM electric motor, where operator holds it for 6 seconds. The bearing is kept on the weighing machine to check whether the assembly is with correct number of components. If bearing is under or over weighed then it is rejected.
In this conventional assembling system, there are possibilities of variation in different processes e.g. axial & radial clearance measurement, grease weight, assembly of incorrect components etc. Also the assembly line does not have sufficient control to have mistake proofing. Hence above scenario has shortcomings and limited scope.
Thus, there is a need for an automatic assembly to eliminate the above referred drawbacks of conventional assembly line.
SUMMARY OF INVENTION:
The present invention discloses an automated assembly machine having two indexing tables to reduce human intervention and to provide mistake proofing during production of integral shaft bearings.
In a preferred embodiment, the automated assembly machine comprises a shaft feeder unit for automatic shaft loading and gauging, including a gauging station; a gauged shaft lifting means for shaft orientation to be performed after shaft gauging, wherein, said mechanism is controlled by Programmable Logic Controller (PLC); a sleeve gauging means for measurement of sleeves to be performed simultaneously while shaft gauging: a sleeve pick & place arrangement to place the gauged sleeves concentric to the gauged shaft; a ball hopper & ball feeder unit to contain and feed correct size & number of balls for the purpose of filling balls in bearing raceways; a ball cage orientation means for correct orientation of cage picked up from conveyor; a cage pick & place means to be performed after ball cage orientation; an inversion means to invert the bearing by 180°; a

roller cage pick & place means for placing roller cage assembly in bearing; a roller cage fitment unit to fix the roller cage inside the bearing; a bearing orientation change & transfer means to place the bearing for weighing and transferring for next operation; a radial clearance measurement unit to verify clearances of the bearing; a grease filling means for greasing the bearing; a seal fixing means for sealing the bearing; a spinning unit to spin the bearing; and a weighing & unloading means.
Brief description of drawings:
Fig, 1 illustrates an automated assembly machine of the present invention.
Fig. 2 illustrates a shaft feeder unit.
Fig. 3 illustrates a gauged shaft lifting means.
Fig. 4 illustrates a sleeve gauging means.
Fig. 5 illustrates a sleeve pick & place arrangement.
Fig. 6 illustrates indexing table sub-assembly 1.
Fig. 7 illustrates a ball hopper unit.
Fig. 8 illustrates a ball feeder unit.
Fig. 9 illustrates a ball cage orientation means.
Fig. 10 illustrates a cage pick & place means.
Fig. 11 illustrates an inversion means.
Fig. 12 illustrates a roller cage pick & place means.
Fig. 13 illustrates a roller cage fitment unit.
Fig. 14 illustrates a bearing orientation change & transfer means.
Fig. 15 illustrates a radial clearance measurement unit.
Fig. 16 illustrates indexing table sub-assembly 2.
Fig. 17 illustrates a grease filling means.
Fig. 18 illustrates a seal pressing means.
Fig. 19 illustrates a spinning means.
Fig. 20 illustrates a weighing & unloading means.
DETAILED DESCRIPTION:
The present invention discloses an automated assembly machine having two indexing tables to reduce human intervention and to provide mistake proofing during production of integral shaft bearing. The automated assembly machine comprises a shaft feeder unit for

automatic shaft loading and gauging, including a gauging station; a gauged shaft lifting means for shaft orientation to be performed after shaft gauging, wherein, said mechanism is controlled by Programmable Logic Controller (PLC); a sleeve gauging means for measurement of sleeves to be performed simultaneously while shaft gauging; a sleeve pick & place arrangement to place the gauged sleeves concentric to the gauged shaft; a ball hopper & ball feeder unit to contain and feed correct size & number of balls for the purpose of filling balls in bearing raceways; a ball cage orientation means for correct orientation of cage picked up from conveyor; a cage pick & place means to be performed after ball cage orientation; an inversion means to invert the bearing by 180°; a roller cage pick & place means for placing roller cage assembly in bearing; a roller cage fitment unit to fix the roller cage inside the bearing; a bearing orientation change & transfer means to place the bearing for weighing and transferring for next operation; a radial clearance measurement unit to verify clearances of the bearing; a grease filling means for greasing the bearing; a seal fixing means for sealing the bearing; a spinning unit to spin the bearing: and a weighing & unloading means.
The accompanying drawings which are incorporated in and constitute an assembly specification, illustrate individual assembly figure that serve as a part of the invention and each when put together served to explain a complete automatic assembly line invention.
The automated assembly machine is described in Fig. 1, which is a preferred embodiment. It consists of the shaft feeder unit (1000), the gauged shaft lifting means (2000), the sleeve gauging means (3000), the sleeve pick & place arrangement (4000), the indexing table sub-assembly 1 (5000), the ball hopper unit (6000), the ball feeder unit (7000), the ball cage orientation means (8000), the cage pick & place means (9000). an inversion means (10000), the roller cage pick & place means (11000), the roller cage fitment unit (12000), a bearing orientation change & transfer means (13000), the radial clearance measurement unit (14000), the indexing table sub-assembly 2 (15000), the grease filling means (16000), the seal pressing means (17000), the spinning means (18000) and the weighing & unloading means (19000).
Referring to Fig. 2, the shaft feeder unit (1000) consists of many small mechanisms. The shafts are loaded from top in between the space of plates (3 & 4). Rods (6) are mounted

on a slide Plate (2) to accommodate different shaft lengths, by adjustment. A locking nut arrangement (7) keeps the adjustment firm. A cover plate (8) is provided which holds the piled up shaft and moving cam indexes in such a way that with its each step, it takes one shaft and places over a v-block (9). A proximity sensor (10) acknowledges the shaft and actuates the pusher to push shaft ahead at gauging station with pusher pin at backside. At shaft gauging station two cylinders (14 & 15) are provided for the movements of anvils (11 & 12), which touch shaft raceway in linear direction. Measurement sensor (16) receives the input from two anvils (11 & 12), which are operated by cylinders (14 & 15). The measurement sensor (16) is programmed to compare observed reading with standard value. Based on this measurement, next unit gets an input signal to either take the shaft for next operation or directs it to rejection bin.
Fig. 3 shows the gauged shaft lifting means (2000) which lifts gauged shafts from gauging station. It consists of a base frame (17) on which an actuator (18) is mounted. An actuator piston frame (19) moves outward and inward to move a main station assembly (21) back and forth. An actuator (22) is mounted on the main station assembly (21) to provide up and down movement to a rotating frame (20), which holds the shaft A. The rotating frame (20) swivels at 90° on a frame (23) to change the shaft orientation from horizontal to vertical. This entire mechanism is mounted aside the feeding mechanism. Hence when gauging is completed, this mechanism gets actuated and the rotating frame (20) is moved downward over the frame (23). Based on inputs from measurement sensor, this mechanism either takes the shaft to next station for OK shafts or drops it into a pipe (24), connected to a frame (25) which directs it towards rejection bin. The motion of this whole mechanism is controlled by PLC programs.
Fig. 4 refers to the sleeve gauging unit (3000). Sleeve gauging is performed simultaneously along with shaft gauging. It consists of a base plates (41) on which subcomponents are mounted. A sleeve "B" is held between two jaw pins (32) which have balls (33) on its spherical surface. The balls (33) rest inside sleeve raceway. Pins (32) are mounted on a plate (30), which are connected to an actuator (27) through a connector (29). The actuator (27) is provided on both the sides for both pins (32) which are mounted on a frame (28). When a sleeve is kept on measuring station, pins (32) touch sleeve raceway via balls (33). The plate (30) is pushed by the actuator (27) in linear direction

through the connector (29) for firm holding of the sleeve "B" by balls (33) and pins (32). A resting plate (34) is connected to another plate (36), having roller at its bottom end. This roller rests on a roller guiding plate (40) that can be moved back and forth. The roller guiding plate (40) is connected to an actuator (38) through a connector (39). The actuator (38) receives the signal for operation and moves ahead causing an obvious movement of the roller guiding plate (40) having a taper that causes the roller to move on this taper. This results in downward movement of the plate (36) along with the plate (34). This movement leads sleeve to hold between two balls (33) in hanging condition for perfect measurement. The movement of jaw pin (32) is captured by measurement sensor (35) through plate (30) and sleeve is gauged.
Fig. 5 illustrates a sleeve pick & place arrangement (4000). It is provided with actuator (43) for horizontal movement and another actuator (44) for vertical movement. Whole structure is mounted on a base (42). Two holding jaws (45 & 47) are connected at one end to frames (46 & 48) and are moved by the actuators (43) & (44). During operation, the jaw (45) is at position X where it moves downward with the help of the actuator (44) & picks up the sleeve. At the same time, the jaw (47) is at position Y, where it picks up gauged sleeve. Now when jaw (45) moves ahead horizontally and reaches to position Y, it moves down and places the sleeve at gauging station. Meanwhile, jaw (47) moves to position Z and places the gauged sleeve concentric to the shaft on an indexing table.
Referring to Fig. 6, the indexing table sub-assembly 1 (5000) with an indexing table (49) indexes shaft & sleeve assembly up-to roller cage fixing operation in step by step manner by an indexing mechanism (53), which is controlled by PLC. It is equipped with eight fixtures (50). At the first station, shaft is loaded for holding purpose. Once the sleeve is placed concentric to shaft, this assembly is moved to next station e.g. ball filling station. This station is operated with one unit having two sub-units i.e. the ball hopper unit (6000) as shown in Fig. 7 and the ball feeder unit (7000) as shown in Fig. 8. The ball hopper unit (6000) is provided with ten hoppers (59) for balls of different grades. It is covered by a rotating plate (60) with a hole (66), which actuates automatically based on sensor signal. It rotates and stops over the ball hopper whose balls are exhausted in order to be filled again. The ball hoppers are mounted on plate (58). The plate (58) is held by plates (56 & 57). Holes are provided at each plate & each ball hopper. Two sensors (65) are provided

to acknowledge the filled hoppers. Small pipes (63) are connected under each hopper with a hole at its base for passing of balls.
The ball feeder unit (7000) is illustrated in Fig. 8. This whole unit is mounted below the ball hopper mechanism. It is mounted on a frame (67) and a horizontal plate (71) which has guide ways for sliding. A block (70) has a hole on its upper face. A plate (68) with ten holes is rested on the block (70). These ten holes are linked with ball hopper by feeder pipes (61) shown in fig 6. Movement of the block (70) is controlled by a limit switch (76) provided at both ends. The block (70) is moved with a belt (74) & a motor (80). A plate present in between the plate (68) & the block (70) ensures passing of selected grade balls from hopper to a ball feeder pipe (78), to raceways. To drain the balls from ball hopper, pipes (77) are provided. Once the balls are filled inside bearing raceways, bearing is indexed to next station where the ball cage is fixed.
The ball cage orientation means (8000) shown Fig. 9. Gripper picks up the cage from conveyor and places it over the orientation mechanism. The ball cage orientation means consists of a hollow cylinder (83) with a pin (88) in it, which rests on a circular plate (87). The hollow cylinder (83) along with the pin (88) is moved by an actuator (85) for correct orientation of the ball cage, acknowledged by a sensor (89). This orientation unit is mounted on a base plate (82) which is supported by a column (81).
Fig. 10 illustrates the cage pick & place means (9000). Four actuators (92, 93, 94 & 95) are mounted on a plate (90) and moved horizontally by a rail (91). Once proper orientation of cage is done, it is picked up by a pick and place mechanism actuator (93). Once bearing comes under actuator (94), the plate (90) moves horizontally backward on a guide ways (91). A spacer (97), operated by an actuator (95), moves over the bearing, spaces the balls equally inside bearing and then moves up. Simultaneously the actuator (93) with the help of a jaw (96) picks up the bail cage "C'; from orientation unit. At the same time, the actuator (92) picks up new ball cage from conveyor. As the plate (90) is moved horizontally ahead, the actuator (94) moves over bearing, the actuator (93) brings the ball cage from orientation location with the help of the jaw (96) & places the cage on balls. At the same time, the bail cage is fixed by the actuator (94) with the help of a pusher (98). Simultaneously, new ball cage is placed by the actuator (92) with the help of

a jaw (99) for orientation. Sensors are provided for controlling the horizontal motion of the plate (90). One side of bearing is loaded with ball and ball cage & other is to be filled with roller cage.
Fig. 11 illustrates the inversion means (10000) to invert the bearing by 180°. Ball & cage filled bearing "D" is indexed to inversion station. This bearing is inverted in 180° by a jaw (102) with the help of an actuator (100). The inversion means is mounted on a column (99). Jaw places the bearing "D" again on index table by moving downwards. This bearing is then indexed to next roller cage filling and fixing station.
Fig. 12 illustrates the roller cage pick & place means (11000). Roller cage assemblies are placed on gang loading conveyor. Two pick and place jaws (105,106) are operated by an actuator (104). An actuator (103) ensures the horizontal movement of a complete unit including pick and place jaws, frame & actuator (104). A pick and place jaw (105) lifts a roller cage assembly from conveyor. The roller cage assembly "E" is picked up by a pick and place jaw (106) simultaneously from a weighing machine (108). The actuator (103) operates and moves whole assembly of pick and place jaw horizontally forward, hence the jaw (105) comes at weighing machine station & the jaw (106) brings roller cage assembly at indexing table where bearing is held. Both pick and place jaw 105 and 106 are moved downward by the actuator (104) so that the jaw (105) keeps the new roller cage assembly at weighing station. The jaw (106) places the roller cage assembly in bearing.
The roller cage fitment unit (12000), as illustrated in Fig. 13, has similar arrangement as that of in the ball cage fixing unit. A push rod (110) is moved downward by an actuator (111) to fix the roller cage assembly inside the bearing "E" and moves upward after fixing the cage. Bearing "E" indexed further for next operation. According to Fig. 14, which illustrates the bearing orientation change & transfer means (13000), the bearing is picked from the first indexing table by a jaw (118), operated by an actuator (113), At this location, bearing orientation is changed from vertical to horizontal. This bearing is moved to weighing station (119) through a plate (112) by a rail (120). The weighed bearing is simultaneously picked up by a jaw (117), operated by an actuator (114), and is moved to the next station of radial clearance measurement. At the same time, a jaw (116) operated

by an actuator (115) picks the bearing from clearance measurement station and moves & places on indexing table two.
Fig. 15 illustrates the radial clearance measurement unit (14000). The bearing is placed on a fixture (123). Both ends of shafts are held by clamps (124) operated by an actuator (128). Simultaneously, a plate (125) on which measuring probes (126) are attached is indexed to make contact of probes on sleeve outer diameter. An actuator (127) moves sleeve to & fro at defined pressure. This measures the radial clearance of bearing "E".
After the clearance measurement, the bearing is transferred to the index table subassembly 2 (15000) which is illustrated in Fig. 16. The bearing is transferred to index table two (139). which has similar indexing mechanism (141). It is provided with a toggle clamp (144) and specifically designed fixtures (140) which perfectly constrains the bearing on it for performing various operations. A sensor (147) is provided to sense seal on the bearing and accordingly give signal to PLC unit. The bearing holding fixture is provided with a lever that extends from main fixture assembly and ends in groove provided at center of rotary indexing table. This lever is provided with a roller which allows the whole fixtures rotation on indexing table for advancing to the next station. This indexing table is also provided with an obstruction plate mechanism (145) controlled by an actuator (142) at seal insertion location. If the bearing is OK, then all the operations are performed on it while rotating on the indexing table. However if the bearing is not OK, indexing table moves that bearing to all the stations but none of the operations is carried out on it and finally it is discharged to the rejection bin.
Further, the bearing along with fixture is held at greasing station viz. the grease filling means (16000). It is shown in Fig. 17. A stopper (150) is provided to control the movement of holding fixture. Greasing unit is mounted on a base (151) and provided with an actuator 148. Once actuator (148) gets signal, it moves the fixture until the bearing sleeve makes contact at both ends of greasing tool (149). Then, grease is dispensed from both the ends of the greasing tool (149) by volumetric control. Once grease is dispensed, bearing is indexed to next station where seals at both ends of bearing are inserted. But as mentioned earlier, if the bearing is not OK then the obstruction plate (145), as shown in Fig. 16, comes in front of the station indicating that no seal insertion is needed.

Fig. 18 illustrates the seal fixing means (17000). It contains a seal fixing tool (156) at both ends. Bearing along with fixture is held at seal fixing station. Seal fixing unit is mounted on a base (155) and provided with an actuator (152). Once the actuator (152) receives signal, the tool (156) is moved until the bearing sleeve makes contact at both ends. Once sea! fixing is done, bearing "F" is advanced to next station for spinning.
The spinning unit (18000), as illustrated in Fig. 19, is mounted on a base (163). The indexing table brings the fixture with bearing "F! exactly in front of a rotary chuck (158). The rotary chuck (158) holds one end of the bearing shaft. An inverted V-Block (161) is moved downwards by an actuator (160) to hold the bearing firmly in the desired position. The rotary chuck (158) is then driven by a motor (162) and bearing is spun for the predetermined time. It is then proceeded for final weighing & unloading. Fig. 20 illustrates the weighing & unloading means (19000). Bearing "F" is picked by a jaw (166), operated by an actuator (165). The jaw (166) is moved forward by an actuator (168). At the same time, a jaw (167) picks the weighed bearing "F" from weighing station and moves forward. If the bearing is overweight or underweight, then a cylinder (169) restricts the movement of the jaw (167) at a rejection bin (172). Otherwise, the jaw (167) moves further to drop bearing at unloading station (171). Simultaneously, the jaw (166) places the bearing at weighing station to complete the cycle.
The present invention eliminates the shortcomings of the conventional systems as all operations are done automatically with desired mistake proofing's at each station. It requires least human intervention, thus reduced supervisory control. Also it reduces risk of wrong/faulty assembly, improves overall efficiency of assembly process & increases productivity by at least by 5 times. It segregates rejection at source, thus reduces rejections & reduction in cost. It is capable to handle higher volumes effectively.
The aforementioned description is for the illustrative purpose only and not intended to limit the scope of the invention to the embodiments.

WE CLAIM,
1. An automated assembly machine having two indexing tables to reduce human intervention and to provide mistake proofing during production of integral shaft bearing comprising,
(i) a shaft feeder unit (1000) for automatic shaft loading and gauging,
including a gauging station; (ii) a gauged shaft lifting means (2000) for shaft orientation to be
performed after shaft gauging, wherein, said mechanism is controlled
by Programmable Logic Controiler (PLC); (iii) a sleeve gauging means (3000) for measurement of sleeves to be
performed simultaneously while shaft gauging; (iv) a sleeve pick & place arrangement (4000) to place the gauged sleeves
concentric to the gauged shaft; (v) a ball hopper & ball feeder unit to contain and feed correct size &
number of balls for the purpose of filling balls in bearing raceways; (vi) a ball cage orientation means (8000) for correct orientation of cage
picked up from conveyor; (vii) a cage pick & place means (9000) to be performed after ball cage
orientation: (vtii) an inversion means (10000) to invert the bearing by 180°; (ix) a roller cage pick & place means (11000) for placing roller cage
assembly in bearing; (x) a roller cage fitment unit (12000) to fix the roller cage inside the
bearing; (xi) a bearing orientation change & transfer means (13000) to place the
bearing for weighing and transferring for next operation; (xii) a radial clearance measurement unit (14000) to verify clearances of the
bearing; (xiii) a grease filling means (16000) for greasing the bearing; (xiv) a seal fixing means (17000) for sealing the bearing; (xv) a spinning un it (18000) to spin the bearing; and (xvi) a weighing & unloading means (19000).

2. The automated assembly machine according to claim 1, wherein said shaft feeder unit (1000) of step (i) comprises a proximity sensor (10) to sense the shaft and push the shaft using pusher pin on gauging station for gauging.
3. The automated assembly machine according to claim 1, wherein said gauge station to gauge the shaft comprises a measurement sensor (16) that compares observed reading with standard value.
4. The automated assembly machine according to claim 3, wherein input to said measurement sensor (16) is generated by plurality of anvils (11,12) that touch shaft raceway in linear direction.
5. The automated assembly machine according to claim 1, wherein said gauged shaft lifting means (2000) of step (u) comprises a rotating frame (20) for orientation of the shaft, an actuator (22) mounted on a main station assembly (21) for vertical movement of said rotating frame (20) and an actuator (18) mounted on a base frame (17) to move said main station assembly (21) back & forth.
6. The automated assembly machine according to claim 1, wherein said sleeve gauging means (3000) of step (iii) comprises a pair of jaw pins (32) to hold the sleeve, pair of actuators (27) each one of which attached to each of pins for firm holding of the sleeves in hanging condition and a measurement sensor (35) to gauge the sleeves capturing the movement of said pins jaw (32).
7. The automated assembly machine according to claim 1, wherein said sleeve pick & place arrangement (4000) of step (iv) comprises actuators (43,44) for horizontal & vertical movement of the sleeve respectively, a pair of jaws (45,47) operable by said actuators (43,44) to pick up the sleeves.
8. The automated assembly machine according to claim 1, wherein said ball hopper & ball feeder unit of step (v) comprises hoppers (59) containing balls of different grades, a pair of sensors (65) to acknowledge filled hoppers, a rotating plate (60) covering said hoppers (59) having a hole (66) actuated based on said pair of

sensors (65) signal to drop balls into empty hoppers, a plate (68) having ten holes resting on a block (70) linked to said hoppers by feeder pipes (61) and a limit switch (76) to control the movement of said block (70).
9. The automated assembly machine according to claim I, wherein said ball cage orientation means (8000) of step (vi) comprises a cylinder (83), a pin (88), an actuator (85) to move said cylinder (83) and a sensor (89) to acknowledge correct orientation of ball cage.
10. The automated assembly machine according to claim 1, wherein said cage pick & place means (9000) of step (vii) comprises actuators (92,93,94.95) and jaws (96,99) actuated by said actuators to pick the cage.
11. The automated assembly machine according to claim 1, wherein said inversion means (10000) of step (viii) comprises a jaw (102) actuated by an actuator (100).
12. The automated assembly machine according to claim I, wherein said roller cage pick & place means of step (ix) comprises pick & place jaws (105,106) and actuators (103,104).
13. The automated assembly machine according to claim 12, wherein said pick & place jaws (105,106) are operated by said actuator (104) which is in turn operated by said actuator (103).
14. The automated assembly machine according to claim I, wherein said a roller cage fitment unit (12000) of step (x) comprises a push rod (110) and an actuator (111) to move said push rod (110) downwards.
15. The automated assembly machine according to claim 1, wherein said bearing orientation change & transfer means (13000) of step (xi) comprises jaws (117,118) to pick the bearing and actuators (1! 3,114) to operate said jaws.

16. The automated assembly machine according to claim 15, wherein the bearing is moved to a weighing station (119) by said jaw (118) operated by said actuator (113).
17. The automated assembly machine according to claim 15 & 16; wherein the weighed bearing is moved from said weighing station (119) by said jaw (117) operated by said actuator (114).
18. The automated assembly machine according to claim I, wherein said radial clearance measurement unit (14000) of step (xii) comprises clamps (124) operated by an actuator (128) to hold the shaft of the bearing and a measuring probe (126) to establish contact with the sleeves.
19. The automated assembly machine according to claim 18, wherein the sleeve is moved to & fro by an actuator (127) at a define pressure while radial clearance measurement.
20. The automated assembly machine according to claims 18 & 19: wherein the bearing is moved from said radial clearance measurement unit (14000) by a jaw (116) operated by an actuator (115) for further operation.
21. The automated assembly machine according to claim 1, wherein said grease filling means (16000) of step (xiii) comprises a greasing tool (149), an actuator (148) and a holding fixture moved by said actuator (148) until bearing sleeves touch both ends of said greasing tool (149) to hold the bearing.
22. The automated assembly machine according to claim 1, wherein said seal fixing means (17000) of step (xiv) comprises a seal fixing unit, an actuator (152) and a seal fixing tool (156) moved by said actuator (152) until bearing sleeves touch both ends of seal fixing tool.

23. The automated assembly machine according to claim 1, wherein said spinning unit
(18000) of step (xv) comprises a rotary chuck (158) to hold one end of bearing, a
motor (162) to spin said rotary chuck (158) for a predetermined time.
24, The automated assembly machine according to claim I. wherein said weighing &
unloading means (19000) of step (xvi) comprises an actuators (165,168), a jaw
(166) operated by said actuators (165,168) to pick and put the bearing on
weighing station (173), a jaw (167) to pick the weighed bearing from said
weighing station (173) & put the bearing on an unloading station (171) and a
cylinder (169) to restrict movement of said jaw (167) if the bearing is overweight
or underweight.