What is a diamond dowel sleeve?
A diamond dowel sleeve is a precision injection molded plastic component used in concrete floor construction joints. It houses a diamond-shaped (square) steel load-transfer plate and lets that plate move sideways as the concrete slab shrinks, while still transferring vertical loads across the joint. The result is a stronger, longer-lasting joint that resists spalling and keeps the floor level.
How diamond dowel sleeves work
The steel diamond plate is fitted into the sleeve, which is cast into one side of the joint. As adjacent slabs shrink or expand with temperature and curing, the plate slides horizontally inside the sleeve — accommodating movement — while resisting vertical differential movement between slabs. This maintains load transfer, protects joint edges and extends floor life.
Sizes & specifications
| Diamond plate size (typical) | Plate thickness (typical) | Sleeve |
|---|
| 100 × 100 mm | 4.5 – 6.3 mm | Matched sleeve |
| 114 × 114 mm | 4.5 – 6.3 mm | Matched sleeve |
| 127 × 127 mm | 6.0 – 6.3 mm | Matched sleeve |
| Custom | Custom | Made to your dowel/joint |
Typical sizes shown — sleeves are made to match your diamond dowel plate and joint design.
Materials
- Durable, impact-resistant engineering plastic
- Non-corrosive — suited to concrete and moisture
- Dimensionally stable for consistent plate fit
- Custom material grades on request
Applications
- Industrial and warehouse concrete floors
- Logistics and distribution centres
- Cold storage and food-grade facilities
- Manufacturing plant floors
- Jointed concrete slabs and pavements
Why choose Rollex for diamond dowel sleeves
- ISO 9001:2015 certified injection molding
- Precise, repeatable sleeve dimensions
- Standard and custom sizes
- Competitive Indian manufacturing with export supply
- 29+ years of molding experience
Diamond dowel sleeves — FAQs
What is a diamond dowel sleeve?
A diamond dowel sleeve is a precision injection molded plastic component used in concrete floor construction joints. It houses a diamond-shaped (square) steel load-transfer plate, allowing the plate to move sideways as the slab shrinks while transferring vertical loads across the joint.
How does a diamond dowel sleeve work?
The steel diamond plate sits inside the sleeve, which is cast into one side of the concrete joint. As adjacent slabs shrink or expand, the plate slides horizontally within the sleeve while still resisting vertical (differential) movement — keeping load transfer across the joint and a level, durable floor.
What sizes of diamond dowel sleeve does Rollex make?
Rollex manufactures sleeves to suit common diamond plate sizes (typically around 100–127 mm with plate thicknesses of about 4.5–6.3 mm). Custom sizes are available to match your dowel plate and joint design.
Does Rollex manufacture custom diamond dowel sleeves?
Yes. Rollex Industries is an injection molding manufacturer in Pune, India producing diamond dowel sleeves in durable engineering plastic, with custom sizes and export supply, under ISO 9001:2015 quality.
Need diamond dowel sleeves?
Send your diamond dowel plate size and joint details and we'll supply matched sleeves — standard or custom.
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