Cylindrical Rubber Shock Absorbers Explained: VV, VD, DD and DE Series, Materials, MOQ and Installation FAQ
2026/10/13
Cylindrical Rubber Shock Absorbers: A Buyer's Guide to Specs, Series and Quality
When specifying vibration control for industrial machinery, one component comes up again and again: the cylindrical rubber shock absorber. Compact and cost-effective, it stops motors, pumps, fans and generator sets from shaking the building they stand on. This guide covers what the part does, how the series are chosen, which materials and tests matter, and how ordering works. The products described are made by JIUFU (Shanghai Songjiang Jiufu Shock Absorber Co., Ltd.), a Shanghai manufacturer with years of export experience.
1. What the Mount Does
The mount sits between machine and base and uses an elastic rubber body to absorb dynamic energy. Natural rubber (NR) is vulcanised to white galvanised steel inserts, giving a robust yet compliant unit that fastens at both ends. When the machine vibrates, the rubber flexes in compression and shear, dissipating energy as heat.
Section Q&A
Q: How is it different from a spring mount?
A: A rubber mount supports load and damps in one component, so it is compact, quiet and maintenance-free. A metal spring covers heavier loads and lower frequencies but usually needs a separate damper.
Q: Does it need maintenance?
A: No - once bolted down and levelled, it has no parts to lubricate or adjust.
2. Choosing the Right Series
- VV: male-male double stud, for clamping between machine and base
- VD: male-female, when only one side accepts a stud
- DD: female-female compact body for small equipment
- DE / VE: threaded studs on a moulded body; VE covers M8/M10/M12
Section Q&A
Q: How do I choose the series?
A: By the mounting points - both ends tapped needs DD, a stud on one side needs VD, two studs need VV.
Q: Are custom threads possible?
A: Yes - beyond standard M6/M8/M10/M12, other threads and sizes can be produced to order.
3. Specifications at a Glance
| Item | Typical value |
|---|---|
| Series | VV (double male stud), VD (male-female), DD (female-female), DE / VE |
| Elastic element | Natural rubber (NR), eco-friendly, ROHS compliant |
| Hardness | Stated in IRHD, selectable by load |
| Moulding | One-piece vulcanised moulding |
| Metal fittings | White galvanised steel to UNI-ISO 2081 |
| Thread sizes | M6 / M8 / M10 / M12 (custom available) |
| Operating temperature | -40C to +80C |
| Rubber-to-metal adhesion | About 40 kg/cm2 |
| Fasteners | Grade 8.8 high-strength bolts |
| Plating salt-spray test | 96 hours (standard is 48 hours) |
| Quality / certification | ISO9001; some models ROHS compliant |
| Origin / brand | Shanghai, China / JIUFU |
Section Q&A
Q: What does the IRHD value mean?
A: It sets the balance between load capacity and isolation: higher carries more load with less deflection, lower moves more and isolates better.
4. Performance Benefits
- Lower structure-borne noise and vibration
- Longer life for bearings, seals and fasteners
- Stable performance from -40C to +80C
- Resistance to ageing, heat, wear, moisture and oil
- Eco-friendly rubber instead of a metal spring
- Quick bolt-down installation
Section Q&A
Q: Will it really cut plant-room noise?
A: It targets structure-borne noise - the low rumble carried through rigid floors and frames. Correctly sized and installed, the difference is clear.
5. Selection and Installation Notes
Correct sizing keeps the rubber within its comfortable deflection range, and correct fitting keeps the machine level and stable.
- Divide total weight by the number of supports to size each mount
- Match thread and height to the mounting points
- Allow for temperature, oil and chemicals when choosing material
- Keep the system's natural frequency away from the machine speed
Section Q&A
Q: What is the biggest installation mistake?
A: Using a mount that is too soft or too hard. Too soft shortens life; too hard defeats isolation. Matching the mount to the actual load is key.
6. Quality, Certification and Ordering
JIUFU products meet the ISO9001 quality system and some models are ROHS compliant. The plated finish passes a 96-hour salt-spray test, rubber-to-steel adhesion is about 40 kg/cm2, and fasteners are grade 8.8. The compound is eco-friendly natural rubber with no reclaimed material, and we support reverse engineering with 3D drawing approval.
| Item | Details |
|---|---|
| MOQ | 10 - 100 pcs depending on model |
| Reference price | From about USD 0.20 each |
| Lead time | About 5 - 8 working days |
| Payment | T/T |
| Packaging | Carton |
| Supply capacity | About 1,000,000 pcs per year |
Section Q&A
Q: What is the minimum order and lead time?
A: Typically 10-100 pcs depending on model, with about 5-8 working days lead time; custom orders are quoted individually.
Summary
For buyers, the cylindrical rubber shock absorber offers a proven balance of performance, durability and cost. Confirm the series by mounting point, size by point load, and rely on tested quality. Contact us with your equipment details for a matched recommendation.
