Description
Rotary N2122 Inner Arm Restraint Moon Gear for SPOA9, SPOA10, and More 2-Post Lifts
The arm restraint system on Rotary 2-post lifts locks the swing arms in position under the vehicle during lifting. The N2122 is the inner half-moon gear that mounts to the arm. This is the newer style gear featuring teeth that slope continuously from bottom to top for best gear engagement. Important: if you are replacing old-style gears (teeth slope only on the top half), you must also replace the outer plunger gear N2121 at the same time – old and new style gears will not mesh correctly together.
Product Information
- Brand / Equipment: Rotary 2-Post Lift (7,000-10,000 lb and 12,000 lb)
- Manufacturer / Reference Part Number: N2122
- Store SKU: FOD3534
- Component: Inner Arm Restraint Gear / Half-Moon Gear (1 gear per listing)
- Tooth Style: New style – continuous slope from bottom to top of gear
- Listed Application: Rotary SP7, SP9, SPOA9, SPO9, SPOA10, SPO10, and related models (see list)
Compatible Makes / Verified Fitment Models
- Rotary SP7
- Rotary SP9
- Rotary SPO9
- Rotary SPOA9
- Rotary SPOA7-200
- Rotary SPOA9-200
- Rotary SPO10
- Rotary SPOA10
- Rotary SPOA10NB
- Rotary A10i
- Rotary S10I
- Rotary A8I
- Rotary SPO12-11
- Rotary SPO12-12
- Rotary SPO12-20 through SPO12-28
Replacement / Cross-Reference Numbers
- Rotary OEM Part Number: N2122
- Replaces Older Rotary Part: FJ7750
- Store SKU: FOD3534
Fitment & Ordering Notes
Verify that your lift model appears in the list above before ordering. If your current gears have teeth with a slope only on the top half, you have the old style and must replace both this gear (N2122) and the outer plunger gear (N2121) together. See related products for N2121. Call 866-902-6060 for assistance identifying your gear style.






