Chillers and refrigeration units
Large mass on 4–6 mounts: the spring holds the design load for years without rate loss.
Compression Springs for Vibration Isolators and Machine Tools — Load Inspection per Batch
The vibro-acoustic design of equipment assumes a specific rate. When a spring drifts in load, the calculation loses meaning and the machine starts transmitting vibration into the foundation.
- Load inspection
- per batch
- Testing
- up to 50 tons
- Quality system
- IATF 16949:2016
An engineer replies within one business day (Moscow + 5 hours). Prototypes — 48 hours after drawing approval.
1 979
founded
47 years in spring manufacturing
145
employees
many with 15+ years in the industry
900 t
springs per month
maximum capacity
60+
coiling machines
cold and hot coiling, CNC
In short: the factory and springs for this industry
XULONG SPRING (China, since 1979) manufactures compression springs for vibration isolator OEMs and machinery builders: wire 0.1–80 mm, load inspection on testing machines rated up to 50 tons with reports for every batch, IATF 16949:2016 quality system, prototypes in 48 hours.
Operating conditions
What the spring faces in this industry
Characteristic scatter within a batch ruins the vibro-acoustic design of the equipment.
- Constant vibration from the machine or unit, transmitted into the supports.
- Requirement for a design rate and its repeatability within a batch.
- Shop environment: oil, coolant, moisture, metal chips.
- Mass application: vibration mounts are installed in series, batch after batch.
- Support designs vary — open spring mounts, housed isolators with a damper, ceiling hangers for pipework: each needs its own coil seating and bearing-end shape.
Typical equipment of the industry
Where the spring assembly sits
We make springs for vibration isolators for specific equipment: each type of unit has its own load profile — and its own requirements for the coil.
Cooling towers and ventilation units
Round-the-clock outdoor duty: corrosion-resistant coating and a stable rate across temperature swings.
Pumps and compressors
Alternating impulses from the rotor: coil fatigue strength matters, not just static load.
Diesel generators
Shock inputs at start-up and shutdown: the spring works from the installed to the peak load.
Transformers
Network short circuits deliver a sharp hit to the supports: the rate needs margin and reliable bearing coils.
Presses, shears, press brakes
Shock-type stamping loads: the spring absorbs the impulse instead of passing it into the shop floor slab.
Industrial washing machines and centrifuges
Large imbalance during spin: series batches with repeatable load for conveyor production.
Pipework and ceiling hangers
Compact springs of small wire diameters for hanger isolators — series production at a moderate price.
Application examples
What spring vibration isolation looks like on site
Inside every such mount there is a compression spring. Below are typical installations where spring vibration isolators with our springs are used.
Product range
Types of vibration isolators we supply springs for
From a ceiling hanger for pipework to a vibration base for a press — every design has its own coil geometry, its own ends and its own load tolerance.
01
Housed vibration mounts
Spring inside a housing on a rubber pad. Overall housing dimensions, free height and perpendicularity of bearing coils are critical.
02
Open spring mounts
The spring works without a housing, in plain view. Needs a stable rate and a coating that survives wet cleaning.
03
Leveling mounts
An adjustment bolt levels the equipment. The spring is made to the exact assembled height and threaded fitting.
04
Hanger isolators (ceiling)
Small wire diameters and critical ends — a ring or a hook. Series batches at a moderate price.
05
Combined: spring + damper
The spring handles low frequencies, the damper handles high ones. Load tolerance and coil concentricity matter.
06
Seismic, restrained
A spring with motion stops takes the shock overload: reliable end coils and load margin.
07
Inertia bases and frames
Large springs for inertia bases: high load per mount, hot-coiled options.
What this means
Requirements for the spring
Compression springs with 100% batch load inspection and measurement reports.
Load repeatability
Scatter within a batch breaks the vibro-acoustic design and equipment tuning.
Precise geometry
Free height and bearing coils — for seating into the mount.
Corrosion protection
Coating for the oily, humid shop environment.
Series capability
Stable batches for series equipment production.
Products for the industry
Which springs we offer
You don't have to pick from a ready list: we manufacture to drawings, samples or technical specifications.
Factory customers in this industry
XULONG springs have worked in vibration isolation since 1979
We supply springs to manufacturers of vibration isolation and noise control systems. Among our customers are the Chinese companies whose logos you see below: producers of housed vibration mounts, hanger isolators and vibration bases for industrial equipment.
-
ZSnoise · 中声 -
JSC Scien · 兆山辰 -
Lifeng · 力丰 -
Huaqiao · 华侨 -
ABJ · 安倍静
Advantages
What this means for your order
Proof, not promises
Quality control of every batch
What removes the risks of sourcing from China
- NDA on request Drawings and technical documentation are never shared with third parties or used for other customers.
- Prototypes in 48 hours You test the samples first — series production is agreed only after your approval.
- Reports for every batch Load, geometry, hardness — with measurement protocols and batch traceability.
- Document package for EAC IATF 16949:2016 certificate, test reports and product data sheets — for declaration and customs.
- Payment in CNY Payment terms and channel are agreed individually before the order is signed.
- Delivery to Russia Rail, road and sea freight via the Far East. Incoterms: FOB, CIF, DAP.
How to start — three steps
- 01
Send a drawing or a sample
PDF, DWG, DXF, a sketch or a physical sample. We sign an NDA on request.
- 02
Get a price and lead time
Our engineer checks manufacturability and proposes material and coating — we reply within one business day.
- 03
Test prototypes in 48 hours
After alignment we produce prototypes and ship them to you. Then — a series batch with inspection and documentation.
Where to start
What we need to calculate and select the spring
You don't have to send a finished drawing — our engineer will help you collect the data. The more complete the input parameters, the more accurate the selection and the faster the approval.
Send the data to our engineer- 1. Equipment weight and number of supports — gives the load per spring.
- 2. Support layout and the position of the center of gravity.
- 3. Required natural frequency or the required degree of vibration isolation.
- 4. Fitting dimensions: free height, outer and inner diameter, wire diameter.
- 5. Environment: humidity, oil, coolant, temperature, outdoor duty.
- 6. Duty cycle: static or cyclic load, number of cycles.
- 7. Special requirements: seismic duty, motion limits, coating requirements.
- 8. Volume: a one-off batch, a service series or regular deliveries.
FAQ
Questions about Vibration Isolators
We manufacture vibration isolators. Do you work as an OEM spring supplier?
Yes. We make springs to your drawings and specifications for your range of mounts, agree load and geometry tolerances, and lock the parameters into the part data sheet.
Do you provide measurement reports for a batch?
Yes. For vibration isolation we check load and rate on testing machines rated up to 50 tons and hand over the reports together with the batch.
Do you guarantee a tight rate tolerance?
Yes. For vibration isolation we agree the tolerance separately and confirm it with reports for every batch.
Can you help calculate the rate for a given load?
Describe the weight, the support layout and the frequency requirements — our engineer will select the geometry and material and prepare the documentation.
Which coatings are available for shop environments?
Zinc plating, nickel plating, cataphoresis, Dacromet, black oxide and preservative oil.
Which materials do you use?
Spring steels 65Mn, 72A, 82B, 60Si2Mn, 55CrSi, 51CrV4, 60Si2CrMn. Wire is sourced directly from Baowu (Baosteel), Kobe Steel, Bekaert and Qingdao Special Steel, which guarantees characteristic consistency.
How do you deliver products to Russia?
We arrange rail container transport, road freight and sea shipping via Far East ports. Delivery terms are agreed per order (FOB, CIF, DAP).
Can we sign a confidentiality agreement?
Yes, we work under NDA: customer drawings and technical documentation are never shared with third parties or used for other customers.