2026-04-29
Timing-belt replacement: the first questions buyers should ask
Before asking for price, replacement buyers should confirm profile, length basis, pulley family, and whether the old reference is still reliable.
Read article →LSL® · Industrial power transmission
Precision Power Transmission Belts for Global Industry
From Ningbo, LSL® supplies rubber V-belts, timing belts, poly-V belts, and polyurethane belt systems for OEM, replacement, and export programs.
Zhejiang INJ Transmission System Co., Ltd.
Belt manufacturer and export supplier for OEM, replacement, and distributor programs.
- • Rubber belts, PU belts, and matching pulley support
- • Factory support for replacement matching and sampling
- • Built for repeat supply, not just for display
Product families
100+
Target industries
5 core
Lead response
24h
Built for sourcing teams, distributors, and OEM engineers
A sourcing-ready portfolio built around friction drives, synchronous motion, polyurethane processing belts, and matching pulley support.
- 20+ years
- Research & manufacturing
- Deep mold library
- Profiles and tooling for precision builds
- Global supply
- Global supply and distributor support
- OEM customization
- Belts, pulleys, and custom surfaces
Find the Right Starting Point
Start from products, industries, or RFQ based on what you already know about the job.
I know the belt family
Go to product families first, then narrow down the likely series.
Browse products →
I know the machine or industry
Start from packaging, textile, agriculture, automotive, or automation applications.
View industries →
I need a supplier to review this
Send the marking, machine type, pulley data, or a photo and move directly into RFQ.
Start RFQ →
Why buyers keep shortlisting INJ
Factory support from one team
Product matching, samples, and repeat orders stay with the same factory team.
Made for OEM and replacement work
The range and working style fit OEM supply, distributor orders, and replacement projects.
Clear response and next steps
RFQs, catalog requests, and application questions are handled with the next action in mind.
Product lines
V-belts, timing belts, poly-V, and industrial rubber belts for heavy-duty friction drives.
Rubber transmission belts
V-belts, timing belts, poly-V, and industrial rubber belts for heavy-duty friction drives.
PU transmission belts
CPU and TPU timing and sleeve belts for precision, cleanliness, and dynamic performance.
Featured belt series
Typical applications, equipment, and recommended belt families.
Industries we serve
Industrial application
Packaging
Typical applications, equipment, and recommended belt families.
Industrial application
Textile
Typical applications, equipment, and recommended belt families.
Industrial application
Automotive
Typical applications, equipment, and recommended belt families.
Industrial application
Agriculture
Typical applications, equipment, and recommended belt families.
Industrial application
Automation & robotics
Typical applications, equipment, and recommended belt families.
Why INJ
Factory-backed supply for technical sourcing
INJ supports replacement, OEM, and export programs with practical product matching, stable production, and direct engineering communication.
Base
Ningbo, China
Scope
Belts + pulleys
Support
RFQ in 24h
Engineering depth
01From classical profiles to demanding synchronous drives, we help you match materials, cords, and coatings to real operating conditions.
Manufacturing discipline
02Consistent processes, traceable batches, and inspection steps designed for repeatable quality at volume.
Responsive partnership
03Fast technical responses, pragmatic documentation, and clear communication for distributors and OEM teams.
Working method
How sourcing usually moves with INJ
Most projects move through the same path: identify the belt, confirm construction details, then move into sampling or repeat supply with clear technical inputs.
01
Reference or application review
Share the existing belt marking, pulley data, machine type, or operating target. This gives the team a concrete starting point instead of a vague inquiry.
02
Structure and material alignment
We narrow the range by profile, cord type, compound, coating, and quantity expectations so the proposed solution matches the real drive condition.
03
Sampling and repeat supply
After confirmation, projects can move into sample supply, trial validation, and repeat production planning for OEM or replacement programs.
Company preview
Manufacturing background, tooling depth, and export support
The catalog is only one part of the offer. Buyers also need factory context, mold coverage, and a team that can support matching, sampling, and repeat supply.
History
More than 20 years focused on transmission parts, starting from rubber V-belts and expanding into rubber timing belts, PU timing belts, and pulley support.
Capability
Advanced equipment and an extensive mold library support broader profile coverage, more stable replacement work, and faster custom development.
Commercial fit
Positioned for OEM, export, and distributor programs that need practical communication, consistent batches, and a supplier that understands cross-reference work.
Compliance support
Certifications & compliance
Compliance support is handled as part of project execution. When documentation matters, we prepare it around the real product, customer requirement, and review stage.
Project-based document support
Certificates and test-related documents can be prepared according to project scope, customer requirements, and the seriousness of the sourcing program.
Export-facing communication
Documentation requests are handled with the same practical mindset as product matching: confirm the real requirement, then provide only what helps qualification move forward.
Aligned with technical review
For critical projects, compliance discussion should be linked with belt structure, materials, and operating conditions rather than separated from the engineering conversation.
News & insights
Company updates and technical articles on belt selection, failure modes, and industry trends — optimized for long-term SEO growth.
2026-04-28
Food-grade belt RFQ: what buyers should prepare before asking
Contact condition, cleaning routine, cover detail, and product-handling task should be declared before a food-grade belt RFQ.
Read article →2026-04-27
Open-end vs endless PU timing belts: which supply form fits the project
Supply form affects fabrication, tracking, price, and installation logic as much as pitch or width in many PU timing-belt projects.
Read article →Tell us your application — we respond within 24 hours
Share your machine type, speed/load, and target belt series. Our team will recommend a practical path to sampling and production.