Stelron Transpart

Stelron Transpart

Stelron FJ Series Transpart


The STELRON TRANS-PART: has been developed to provide smooth, positive, cam controlled rotary-linear combined motions to an external output shaft. A compact housing encloses the internal parts and provides (5) different mounting surfaces to suit a wide variety of installations.

The STELRON FJ SERIES TRANS-PART: has been designed to permit mounting to a surface where the standard lower bearing shaft projections are undesirable.

The modified construction avoids the necessity of providing openings in the mounting base plate for clearance purposes. This has been accomplished with only minimal reductions in the maximum linear or rotational strokes for the 6 standard sizes available.

The FJ Series eliminates lower shaft and bearing projections for improved mounting applications while all other applications remain unchanged. Maximum axial and rotational strokes are only slightly reduced.

In Addition, all external dimensions remain unchanged except for the P, Q and R dimensions.


OSCILLATING-LINEAR output movement wherein the output shaft reverses its rotation after each complete linear stroke.


INTERMITTENT-LINEAR output permitting rotary indexing after each complete linear cycle. Both types allow input shaft rotation in either direction with the corresponding output rotation.


Cylindrical-Linear output wherein output shaft reverses its rotation after each half-linear stroke (no locking key).


Rotation only-no linear movement.


Five standard sizes in each type provide a wide range of standard rotary and linear strokes as well as load capacities.


Rotation of the input drive shaft (cw or ccw) causes a track cam and lever to produce linear movement of the output shaft. Rotary motion is derived from a cylindrical rib cam which drives a ball slide mounted rack to rotate the output gear and shaft. Positive angular positioning (repeatability within .001/6" radius) is obtained by the engagement of a pair of needle type cam rollers with a hardened and ground guide key(s). Each set has one adjustable roller to eliminate "shake" in any angular location. The transitions from rack and gear to roller-key guidance is smoothly effected by overlapping these machine elements for positive constraints at all times. Suitable fitting rib cam followers, ball slide rack and pinion gear keeps rotational backlash to the minimum necessary for high speed operation and exact angular stopping. Output function may be taken from either end of the shaft.


Since the rotational motion is a direct function of the cam stroke, any angular movement less than 180 degrees is obtainable with the addition of a special cam and positional locking rollers. Nonstandard linear strokes and shaft extensions are also available.


  • a) The TRANS-PART may be mounted in any position with (5) different mounting surfaces provided. Optional mount bases are available.
  • b) Both ends of the output shaft are unhardened to permit customer drilling or reaming operations.
  • c) An optional tubular linear shaft is available to provide pneumatic, vacuum or electrical accessibility to output tooling.