Company profile
About INJ
Zhejiang INJ Transmission System Co., Ltd. is based in Ningbo, Zhejiang. For more than 20 years, we have focused on belt and pulley manufacturing for industrial, OEM, replacement, and export supply programs.
Zhejiang INJ Transmission System Co., Ltd.
INJ is the manufacturing and export team behind LSL® belts, serving OEM, replacement, and distributor business.
20+
Years focused on transmission parts
Ningbo
Export-oriented manufacturing base in Zhejiang
LSL®
Own-brand belts and timing pulleys
About INJ
INJ is the manufacturing and export team behind LSL® belts, serving OEM, replacement, and distributor business.
How We Work
01
Share the current belt marking, drawing, sample, or machine type.
02
We confirm the likely family, structure, and order requirements.
03
Then we move to sample approval or regular supply.
From belt production into broader drive-system support
The business grew from rubber V-belts into rubber timing belts, PU timing belts, polyurethane processing belts, and matching timing pulleys. Advanced equipment and an extensive mold library support both standard supply and customized programs.
Typical project fit
OEM replacement, export catalog supply, belt marking cross-reference, and applications that need steady quality, practical engineering support, and clearer sourcing communication.
Production range
Rubber V-belts
Wrapped, cogged, banded, and narrow-section constructions for industrial drive systems across different horsepower and speed requirements.
Rubber timing belts
Neoprene-based synchronous belts with glass fiber or aramid reinforcement, available across inch and metric tooth profiles for precise power transmission.
PU industrial belts
Standard polyurethane timing belts plus coated and fabricated variants with fabric, TPU, PUR, and other surface options for customized conveying and indexing.
Timing pulleys
Matching pulleys with configurable materials, surface treatments, and precision grades to support complete belt-and-pulley sourcing.
Why buyers work with INJ
The goal is straightforward: deliver stable quality, practical support, and a sourcing path that works in production, not only in a brochure.
Need to see whether INJ fits your job?
The fastest way is to send a real RFQ with your machine and belt information. That gives a much clearer answer than reading general company information.