Account
Inquiry
That 3A2006 model you're looking at, the SBT elastic spider coupling, runs about $8-12 for a sample unit, mid-tier orders of 50-100 pieces drop to roughly $5-7 each, and bulk quantities of 500 or more typically land around $3-4 per piece, so the cost-effectiveness really kicks in once you're scaling up.
It basically handles shaft transmission systems for things like water pumps and mechanical cushioning setups, where that vibration absorption and torque transmission — 22.4 to 2500NM depending on size — makes a real difference in keeping everything running smooth, but it's not great for high-speed applicaion above 3000 RPM or so, just so you know the limits.
material is NBR or CPU/TPU, and what it does is combine plastic-like strength with rubbery elasticity, giving you a Shore A hardness range from 70 to 98 and tensile strength between 8 and 55MPa, which matters because you can match the durometer to your specific load without overspecifying, and the tempearture range goes form -40°C to +100°C, fine for most industrial environments.
We've been making these for years, and one thing you don't always think about is the compression set — it's under 10% after 22 hours at 70°C, so the spider won't lose its shape and start slipping on you over time, and with abrasion resistance under 0.05 cm³ per 1.61 km, these things outlast a lot of the cheaper polyurethane alternatives you'll find floating around.
Sizes run from T40 up to T210 (check lead time on the larger ones, we usually have stock on T40 through T100), and you can get them in black or natural finish — untreated surface, so no coating to wear off, which is actually better for oil and ozone resistance in most cases, and our company can do OEM/ODM if you need custom dimensions or a different color.
MOQ varies by size and material blend. For standard T40 to T210 sizes in NBR, it's typically 50 pieces. Custom CPU/TPU blends or OEM orders may require a higher minimum—just let us know your qty and we'll confirm.
Yes, we can share test reports for oil immersion (per ASTM D471) and ozone exposure (per ASTM D1149) showing the <0.05cm³/1.61km abrasion and <10% compression set. Just request them with your order.
Custom TPU orders with hardness adjustments typically take 15-20 working days after sample approval. That includes tooling if needed for non-standard sizes. We'll give you a firm timeline once we review your spec.
Store in a cool, dry place away from direct sunlight and ozone sources like motors. Keep the original packaging or use a sealed bag to prevent surface dust. Proper storage keeps the NBR or TPU elastic properties stable for years.
The spider insert itself is sold separately from the flanges. We can supply matched flange hubs for your T40-T210 size, just specify your shaft bore and keyway dimensions. If you need a full assembly, we'll bundle it for you.
