Rubber vibration isolators, also called anti-vibration mounts, rubber machine mounts or cylindrical stud mounts, in 71 sizes. The rubber body sits between a machine and its base and soaks up the shaking from pumps, compressors, fans, motors and generators. Pick the stud thread that matches your holes (#6-32 to 3/8-16, M6 or M8), then the diameter: 7/16" to 1" for light equipment, 1-1/4" and 1-1/2" for heavier loads. Mounts start at $2.12.
Shop rubber vibration isolator mounts — also called rubber motor mounts, anti-vibration mounts, or isolation mounts — for compressors, electric motors, pumps, generators, HVAC equipment, and power tools. These cylindrical motor mount rubber isolators with bonded steel studs absorb vibration and shock before it transfers into frames, floors, and enclosures — quieting equipment, protecting fasteners from loosening, and extending machinery life. Unlike automotive engine mounts, these universal stud-style rubber motor mounts fit any equipment with a matching bolt hole.
How to choose a vibration isolator mount:
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Stud configuration: Male/Male (stud both ends) mounts between two threaded holes or nuts; Male/Female (stud one end, threaded insert the other) is the most versatile; Female/Female bolts in from both sides.
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Thread size: match your equipment's mounting holes — we stock #6-32, #8-32, 10-32, 1/4-20, 5/16-18, 5/16-24, 3/8-16, M6, and M8. See the Vibration Mount Size Chart to jump straight to your thread size.
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Rubber diameter & height: larger diameter carries more load; taller rubber absorbs more vibration. For most bench equipment, 3/4"–1" diameter is right; compressor and motor mounts typically take 1"–1-1/2".
Every product title lists diameter x height plus thread spec, so you can match your old mount exactly. Full guidance in how to choose rubber vibration isolator mounts, or email customerservice@rubberfeetwarehouse.com. For panel-mounted vibration damping, see compressor rubber grommets; for washing machines and pad-style isolation, see anti-vibration bumper pads; for equipment feet, see screw-on rubber bumper feet. Ordering for production? Bulk pricing available.
Vibration isolation mounts by thread size
| Stud thread |
Mounts listed |
| 6-32 |
5 |
| 8-32 |
5 |
| 10-32 |
3 |
| 1/4-20 |
26 |
| 5/16-18 |
24 |
| 3/8-16 |
3 |
| M6 |
2 |
| M8 |
2 |
Vibration isolator mount FAQ
What is a cylindrical vibration isolator?
A rubber cylinder with a threaded metal stud or insert bonded into each end. One end bolts to the equipment and the other to the frame or base, so the rubber sits between them.
Which vibration isolation mount do I need?
Match three things to your old mount or mounting holes: thread size, stud configuration (male/male, male/female or female/female) and rubber diameter × height. Every product title lists all three.
What is the difference between male/male and male/female mounts?
Male/male mounts have a threaded stud on both ends; male/female mounts have a stud on one end and a threaded hole on the other. Browse male/male, male/female or male/blank mounts.
Which thread sizes do you stock?
Mounts in this collection use 6-32, 8-32, 10-32, 1/4-20, 5/16-18, 3/8-16, M6, M8 threads (count by size in the table above). The vibration mount size chart lists dimensions.
Can I use these as rubber feet?
Yes. Many customers use them as leveling or anti-vibration feet; see also adjustable rubber leveling feet.
How fast do mounts ship?
Orders usually ship within 24 hours by UPS or FedEx with tracking from our warehouse in Elgin, South Carolina; orders over $199 ship free to the East & Central US (West Coast, Alaska & Hawaii: free over $399).
Related: Anti-vibration pads · Compressor grommets · Screw-on rubber feet
Also searched as: shock mounts, vibration dampers, rubber bobbins, stud mounts.
Sizing help: All guides & size charts
Vibration isolator size chart: 48 mounts in stock now
Built from today's stock. Rubber diameter x height links to the product; stud length is the thread length on each end. Prices are per mount, with bulk pricing on each product page.
Materials and how to choose the size
These cylindrical mounts are natural or synthetic rubber bonded to zinc-plated steel studs or inserts. Softer, taller rubber isolates more vibration but lets the machine move more; shorter, wider mounts carry more weight and keep it steadier. Use at least four mounts per machine and share the load evenly. For a 1/4-20 bench tool, 3/4"–1" diameter is typical; compressors, pumps and generators usually take 5/16-18 or 3/8-16 in 1"–1-1/2" diameter.
Load the rubber in compression (machine weight pressing straight down), not in shear or tension, and do not tighten the studs with the rubber twisted. Add a washer on each side of thin sheet-metal frames.
More isolator mount answers
What is the difference between a vibration isolator and a rubber foot? An isolator bolts to both the machine and the base, so the rubber carries the load between them; a rubber foot only touches the floor. See 1/4-20 rubber feet and mounts and 5/16-18 rubber feet and mounts.
Can I replace a metric M6 or M8 mount with an inch one? No; match the thread. We stock M6 mounts and M8 x 14mm studs as well as inch threads.
Related: male/male mounts · male/female mounts · anti-vibration pads · compressor grommets
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