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About Selecting Shock Absorbers
To select the best shock absorber for your application, you need to find the energy capacity your application requires. Use this formula to calculate the energy capacity required to stop a horizontal-moving load. For example, if you have a 250-lb. load moving at 25 inches per second, your calculation is (250 lbs. ÷ 772) × 252 = 202.4 in.-lbs. energy capacity.
Note: Choose a shock absorber with a higher energy capacity than you calculated. Factors such as driving force or an inclined surface will increase the energy capacity required.
Energy Capacity (in.-lbs.) = (Weight, lbs./772) × Velocity2 (in. per second)
Mounting Blocks for Shock Absorbers
Mount threaded-body shock absorbers. Use mounting nuts to secure.
Mounting Blocks
Flange Mount with 2 Mounting Holes
Flange Mount with 4 Mounting Holes
Lug Mount
Mount. Holes | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size  | Thread Pitch, mm | Wd. | Thick. | Ht. | Dia. | Ctr.-to-Ctr. Wd. | Ctr.-to-Ctr. Ht. | No. of | Mounting Fasteners Included | Material | Each | |
Flange Mount | ||||||||||||
| 3/8"-32 | __ | 1.5" | 0.56" | 1" | 0.18" | 1" | __ | 2 | No | Steel | 0000000 | 000000 |
| 1/2"-20 | __ | 1.5" | 0.56" | 1" | 0.18" | 1" | __ | 2 | No | Steel | 0000000 | 00000 |
| 9/16"-18 | __ | 1.81" | 0.62" | 1.37" | 0.22" | 1.38" | 1" | 4 | No | Steel | 000000 | 00000 |
| 3/4"-16 | __ | 2" | 0.62" | 1.5" | 0.22" | 1.5" | 1.12" | 4 | No | Steel | 000000 | 00000 |
| 1"-12 | __ | 2" | 0.62" | 1.5" | 0.22" | 1.5" | 1.12" | 4 | No | Steel | 000000 | 00000 |
| 1 3/4"-12 | __ | 3" | 1/2" | 2.25" | 0.34" | 2.38" | 1.62" | 4 | No | Steel | 0000000 | 00000 |
| M8 | 1 | 1" | 0.39" | 0.47" | 0.177" | 0.63" | __ | 2 | Yes | Steel | 00000000 | 00000 |
| M10 | 1 | 1.5" | 0.48" | 1" | 0.18" | 1" | __ | 2 | No | Steel | 0000000 | 00000 |
| M12 | 1 | 1.5" | 0.48" | 1" | 0.18" | 1" | __ | 2 | No | Steel | 0000000 | 00000 |
| M14 | 1.5 | 1.77" | 0.62" | 1.1" | 0.18" | 1.38" | __ | 2 | No | Steel | 0000000 | 00000 |
| M20 | 1.5 | 1.85" | 0.62" | 1.38" | 0.22" | 1.38" | 1" | 4 | No | Steel | 0000000 | 00000 |
| M25 | 1.5 | 1.85" | 0.62" | 1.38" | 0.22" | 1.38" | 1" | 4 | No | Steel | 0000000 | 00000 |
| M45 | 1.5 | 3" | 1/2" | 2.25" | 0.39" | 2.36" | 1.62" | 4 | No | Steel | 0000000 | 00000 |
Lug Mount | ||||||||||||
| 9/16"-18 | __ | 3" | 0.38" | 2" | 0.22" | 2.5" | __ | 2 | No | Steel | 0000000 | 00000 |
| 3/4"-16 | __ | 3" | 0.38" | 2" | 0.22" | 2.5" | __ | 2 | No | Steel | 0000000 | 00000 |
| 7/8"-14 | __ | 3" | 0.38" | 2" | 0.22" | 2.5" | __ | 2 | No | Steel | 0000000 | 00000 |
| 1"-12 | __ | 3" | 0.38" | 2" | 0.22" | 2.5" | __ | 2 | No | Steel | 0000000 | 00000 |
| 1 1/4"-12 | __ | 3" | 0.38" | 2" | 0.22" | 2.5" | __ | 2 | No | Steel | 0000000 | 00000 |
| 1 3/8"-12 | __ | 3" | 0.38" | 2" | 0.22" | 2.5" | __ | 2 | No | Steel | 0000000 | 00000 |
| M14 | 1.5 | 3" | 0.38" | 2" | 0.22" | 2.5" | __ | 2 | No | Steel | 0000000 | 00000 |
| M20 | 1.5 | 3" | 0.38" | 2" | 0.22" | 2.5" | __ | 2 | No | Steel | 0000000 | 00000 |
| M25 | 1.5 | 3" | 0.38" | 2" | 0.22" | 2.5" | __ | 2 | No | Steel | 0000000 | 00000 |
| M33 | 1.5 | 3" | 0.38" | 2" | 0.22" | 2.5" | __ | 2 | No | Steel | 0000000 | 00000 |
| M36 | 1.5 | 3" | 0.38" | 2" | 0.22" | 2.5" | __ | 2 | No | Steel | 0000000 | 00000 |
Mounting Nuts
Hex Nut
Round Nut
Steel | Stainless Steel | Zinc | |||||
|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Each | Each | Each | |||
Hex Nut | |||||||
| 3/8"-32 | __ | 0000000 | 00000 | 000000 | 00 | 000000 | 00 |
| 1/2"-20 | __ | 0000000 | 0000 | 000000 | 00 | 000000 | 00 |
| 9/16"-18 | __ | 0000000 | 0000 | 0000000 | 00000 | 000000 | 00 |
| 3/4"-16 | __ | 000000 | 00 | 0000000 | 00000 | 0000000 | 00000 |
| 1"-12 | __ | 000000 | 00 | 0000000 | 00000 | 0000000 | 0000 |
| 1 1/4"-12 | __ | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
| 1 3/8"-12 | __ | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
| M8 | 1 | 0000000 | 0000 | 000000 | 00 | 000000 | 00 |
| M10 | 1 | 0000000 | 0000 | 000000 | 00 | 000000 | 00 |
| M12 | 1 | 0000000 | 0000 | 000000 | 00 | 000000 | 00 |
| M14 | 1.5 | 0000000 | 0000 | 000000 | 00 | 000000 | 00 |
| M20 | 1.5 | 0000000 | 0000 | 000000 | 00 | 000000 | 00 |
| M25 | 1.5 | 0000000 | 0000 | 000000 | 00 | 000000 | 00 |
| M33 | 1.5 | 0000000 | 00000 | 000000 | 00 | 000000 | 00 |
| M36 | 1.5 | 0000000 | 00000 | 000000 | 00 | 000000 | 00 |
Round Nut | |||||||
| 1 3/4"-12 | __ | 0000000 | 00000 | 000000 | 00 | 000000 | 00 |
| M45 | 1.5 | 0000000 | 00000 | 000000 | 00 | 000000 | 00 |