Anti-Vibration Mounts
Anti-vibration mounts isolate machinery from the surface it sits on, absorbing the energy that would otherwise transmit as noise, structural vibration, or premature equipment wear. Used correctly, they extend the service life of compressors, generators, HVAC units, pumps, motors, and precision machinery — and they keep the machine room quiet.
Elgin stocks rubber anti-vibration mounts in metric (M8 through M12) and SAE (1/4" through 3/4") thread sizes, in male-male (stud-stud), male-female (stud-tap), and female-female (tap-tap) configurations. Every SKU lists the rubber durometer, body dimensions, thread size, and recommended duty range. For applications requiring engineering submittals or certified load test data, request the manufacturer data sheet and we'll email it within one business day.
Free Technical Downloads
- 📄 Anti-Vibration Mount Selection Chart (PDF) — Pick the right SKU in 60 seconds
- 📄 Stud Configuration Diagram (PDF) — Male-male, male-female, female-female explained
Browse by stud configuration
Request Data Sheet → | Find Your Mount Quiz →
How to choose an anti-vibration mount
1. Calculate the load per mount
Divide the total weight of your equipment by the number of mounting points. A 200 lb compressor on 4 mounts puts 50 lb per mount. Always add a safety factor — pick a mount rated for at least 1.5× the calculated static load to allow for dynamic loading and uneven weight distribution.
2. Pick the thread style
- Male-Male (stud-stud): Both ends have threaded studs. Use when both the equipment and the mounting surface have tapped holes.
- Male-Female (stud-tap): One stud, one tapped hole. Most versatile — the stud bolts to the equipment, the tapped end accepts a bolt from the surface.
- Female-Female (tap-tap): Both ends are tapped holes. Used when bolts pass through both the equipment and the mounting surface from outside.
3. Match the thread to your equipment
| Thread Size | Typical Use |
|---|---|
| M8 / 5/16-18 | Small motors, fans, 3D printers, light HVAC |
| M10 / 3/8-16 | HVAC condensers, mid-size compressors, pumps |
| M12 / 1/2-13 | Industrial generators, large compressors, bases |
| 5/8-11 / 3/4-10 | Heavy industrial equipment over 200 lb per mount |
4. Match durometer to the duty
| Durometer | Duty Level | Best For |
|---|---|---|
| Shore 40A | Light | Audio gear, electronics, fans |
| Shore 50A | Light-Medium | Small motors, light HVAC, 3D printers |
| Shore 60A | Medium | HVAC, compressors, pumps, generators |
| Shore 70A | Heavy | Industrial machinery, presses, mills |
Common applications
- HVAC & mini-split units
- Generators & compressors
- Pumps & motors
- CNC machines & workbenches
- Audio equipment & turntables
- Marine engines
- Washing machines & appliances
Anti-vibration mounts vs. anti-vibration pads
Mounts use threaded studs to bolt equipment in place while still isolating it from the surface. Pads sit underneath equipment with no fastening — they rely on weight to stay in place. Use mounts when the equipment can shift, tip, or experience horizontal forces. Use pads for static, heavy equipment that won't move.
About load specifications
Each product page lists the rubber durometer, body dimensions, and recommended duty range based on industry-standard sizing. For applications requiring exact engineering data — maximum compression load, shear load, natural frequency, deflection curve — request the manufacturer data sheet. Most data sheets emailed within one business day.
Frequently Asked Questions
What's the difference between an anti-vibration mount and a vibration isolator?
The terms are used interchangeably. "Isolator" is more common in engineering specifications; "mount" is more common in maintenance and purchasing language. The parts are identical.
How many anti-vibration mounts do I need?
Most equipment uses 4 mounts (one per corner). Long, narrow equipment like inline generators may use 6. Always check the manufacturer's mounting pattern.
Can I use anti-vibration mounts outdoors?
Standard rubber mounts are weather-resistant but degrade with prolonged direct UV exposure. For outdoor use without cover, choose stainless-cap variants. For HVAC condensers shaded by the unit, standard mounts work fine.
Do I need a thread-locking compound on the studs?
For high-vibration applications (compressors, generators, washing machines), yes — apply medium-strength threadlocker to both stud ends. Skip it for static or low-vibration use.
How fast do you ship?
Same-day for orders placed before 2pm ET. Standard shipping is 2–4 business days from Elgin, South Carolina.
Need exact specifications for engineering submittal? Request Data Sheet →