This J‑series gear coupling sleeve (also known as Sure‑Flex flexible coupling element) is a toothed rubber/TPU buffer insert for shaft power transmission. It serves as direct replacement for Lovejoy J‑type gear couplings. Multiple material options are available including natural rubber, NBR, CSM, TPU and nylon, delivering shock absorption, vibration dampening and misalignment compensation for industrial drive systems.

Key Advantages
- Compensate angular, parallel and axial shaft misalignment
- Excellent shock absorption & vibration damping, protect connected equipment
- Wear‑resistant, anti‑compression, long service life for heavy‑duty operations
- Multiple material grades for different temperature & media environments
- No lubrication required, low noise during running
- Quick on‑site installation & replacement
- Full stock for standard sizes; OEM & custom molding available

 Available Coupling Series
✅ PU Coupling Series：GR, GS, MT, MH, HRC, L‑series
✅ Rubber Gear Coupling：J‑Series(3J‑14J), Hb, NM, NOR‑MEX, FCL, Hytre, Tyre series
✅ Compatible replacement brands：Lovejoy, Joong Ang, Centaflex

Note: We can also supply matching steel coupling hubs for above series.

Application Fields
Widely applied for air compressors, water pumps, gearboxes, conveyors, hydraulic units, general‑purpose industrial machinery, mining and construction equipment.

 When sending inquiry, please kindly confirm: coupling type, size number, material requirement and quantity.
 OEM custom sizes, hardness and colors are acceptable.
  Email: yc@ycrubberplastic.com

 FAQ
- Q: Are these J‑series sleeves interchangeable with original Lovejoy Sure‑Flex coupling?
A: Yes, standard dimensions are fully interchangeable for 3J‑14J series.
- Q: Can I get non‑standard custom sizes?
A: OEM & custom molding service supported, please provide drawing or sample.
- Q: Which material should I choose?
A: Rubber for general vibration damping; TPU for higher wear‑resistance; NBR for oil‑exposed working conditions.

Packaging
Packed in poly bags, cartons, wooden pallets or crates according to order volume.