About Durometer Hardness Scales
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Slotted Unthreaded Spacers
An economical alternative to standard unthreaded spacers.
Zinc-plated steel spacers provide some corrosion resistance.
Galvanized steel spacers hold up to corrosion better than zinc-plated steel spacers. You can also paint them to match other products.
For technical drawings and 3-D models, click on a part number.
Unthreaded Bumpers
Install these bumpers with screws. Often used as feet, spacers, and vibration dampers, they absorb shock to prevent damage to equipment and surfaces. All have a hard rating to withstand high levels of impact. They're also known as recessed bumpers.
SBR bumpers have good abrasion resistance. They are not for use outdoors.
For technical drawings and 3-D models, click on a part number.
| OD | Ht. | Mounting Surface Ht. | Counterbore Dia. | Mounting Hole Dia. | Temp. Range, °F | For Use Outdoors | Hardness Rating | Hardness | Nonmarking | Color | Pkg. Qty. | Pkg. | |
SBR Rubber | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 21/32" | 1/2" | 1/4" | 5/16" | 5/32" | 0° to 180° | No | Hard | Durometer 70A | No | Black | 25 | 0000000 | 000000 |
Heavy Duty Unthreaded Bumpers
All of these bumpers are reinforced with an embedded washer or base plate for strength. Often used as feet, spacers, and vibration dampers, they absorb shock to prevent damage to equipment and surfaces. They're also good for starting and stopping motion on automated machines. Install them with screws. These bumpers are also known as recessed bumpers.
Bumpers with a hard and medium-hard rating withstand high levels of impact. The harder the bumper, the more impact it withstands.
SBR bumpers have good abrasion resistance. They are not for use outdoors.
For technical drawings and 3-D models, click on a part number.
| OD | Ht. | Mounting Surface Ht. | Counterbore Dia. | Mounting Hole Dia. | Temp. Range, °F | For Use Outdoors | Hardness Rating | Hardness | Nonmarking | Color | Pkg. Qty. | Pkg. | |
SBR Rubber with Steel Embedded Washer | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 21/32" | 1/2" | 1/4" | 5/16" | 5/32" | 0° to 180° | No | Hard | Durometer 70A | No | Black | 25 | 0000000 | 000000 |
Adhesive-Back Bumpers
Press these bumpers into place with the adhesive backing. Use them as feet and spacers on instruments and small appliances to limit sliding, vibration, and noise. They're comparable to Bumpon bumpers.
Bumpers with an extra-hard and medium-hard rating withstand higher levels of impact than softer bumpers. The harder the bumper, the more impact it withstands.
Polyurethane bumpers have good abrasion resistance. They're also nonmarking. Plastic bumpers are chemical resistant and won't dry out and become brittle when exposed to UV rays. They're also nonmarking. They are not for use outdoors.
For technical drawings and 3-D models, click on a part number.
| OD | Ht. | Temp. Range, °F | For Use Outdoors | Hardness Rating | Hardness | Nonmarking | Color | Pkg. Qty. | Pkg. | |
Vinyl Plastic | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 21/32" | 21/64" | 50° to 100° | No | Medium Hard | Durometer 60A | Yes | Black | 64 | 0000000 | 000000 |