TORK-MATE™
890 Series
Design Features

1. Piston
Aluminum alloy, designed for the most demanding applications.

2. Piston bearing
Low friction wear band centers the piston for extended life.

3. Piston Seal
A double acting, PTFE, O-ring energized seal minimizes friction and requires an extremely low breakaway force. Provides a much longer life than conventional O-rings.

4. Pinion
High strength steel, plated for corrosion resistance. Precisely machined gear minimizes wear and backlash.

5. Piston Rack
Precision engineered tooth profile and wide engagement with pinion minimizes wear and maximizes strength. An integral safety bar* prevents any possible pinion blowout.

6. Pinion Bearings
A proprietary high wear, low friction acetal compound extends life.

7. Pinion Seals
Nitrile, specially lubricated for life.

8. Lubrication Groove
Unique lubrication groove between the piston seal and piston bearing holds the proper amount of grease where it is needed for maximum life.

9. Thrust bearing
Designed for maximum life.

10. Fasteners
304 stainless steel are high strength and corrosion resistant.

11. End Caps
Special aluminum alloy for durability. Powder coated for corrosion resistance and durability. Optional spring return end caps have restrained springs for easy installation.

12. Housing
Extruded aluminum alloy, precision machined with a proprietary hard coat finish internally and externally to guard against wear and corrosion.

13. Piston Heel Bearing
Large acetal bearing controls gear backlash and eliminates rack fatigue.