"BALL SCREW WITH UNIQUE SELF LOCKING AND SELF ALIGNING YOKE DESIGN"
HMT Machine Tools limited, a company registered under the Companies Act, 1956, having its registered office at HMT Machine Tools limited, HMT Bhavan, 59, Bellary Road, Bangalore - 560 032. Kamataka, India, Indian Company
The following specification particularly describes and ascertains the nature of this invention and the manner in which it is to be performed
This invention relates to re-circulating system of Nuclear Application stainless steel "BALL SCREW WITH UNIQUE SELF LOCKING AND SELF-ALIGNING YOKE DESIGN" with return cap. This design can be used for other general application of Ball Screws.
The unique feature of this re-circulation system to the other existing system is that the "Yoke" which diverts the ball for re-circulation is sturdy and uses impact resistant steel than the conventional tube re-circulation method whew tongue portion of tube design generally fails. The yoke designs focuses on elimination of this problem.
Superior yoke design provides ultimate safety for ball re-circulation, which follows the tangential entry and exit, combined with its unique Self-locking as well as self-aligning yoke. This method of re-circulation has the best feature for Double start / Multi start Ball Screw Application.
The other salient features of this yoke design.
a. This design provides most effective assembling technique.

b. Return cap is Robust in design and prevents any damage in re-circulating
path unlike in tube design.
c. This design can be used for complete range of Ball screw manufacturing
including high lead variants,
d. This design has the robust path of interned re-circulation, which is now translated to as an external re-circulation.
e. This unique design offers elimination of soldering and paves way for environmental safety aspects in nuclear application.
This design has undergone rigorous field test and evaluated for its best performance. A schematic diagram shows the design brief of this unique yoke desian for Ball Screw in Annexure -I