




The STD S5M Timing Belt series is engineered for high torque, high power transmission, and precise motion control in industrial machinery. With a 5mm pitch and robust synthetic rubber construction, these belts incorporate glass fiber tension cords and wear-resistant fabric coating for long-lasting durability. Models such as STD365-S5M (73 Teeth) to STD420-S5M (84 Teeth) are available in multiple widths from 10mm to 40mm, allowing full compatibility across a wide range of machines.
This belt series is ideal for demanding applications including packaging machines, 3D printers, automotive production lines, CNC equipment, and more. Compared to standard STS belts, the STD S5M series offers up to 1.8× improved power transmission, better noise reduction, and extended service life—making it the smart choice for high-performance synchronous drives.
Key Features:
Profile: STD S5M (5mm pitch, arc-tooth)
Materials: Synthetic rubber with fiberglass core + abrasion-resistant outer layer
Models: STD350–STD420 (70–84 teeth)
Widths: 10mm, 15mm, 18mm, 20mm, 25mm, 30mm, 35mm, 40mm
Advantages:
1.4–1.8× higher torque capacity vs. regular STS belts
Vibration damping and reduced operating noise
Long service life with minimal maintenance
Compatible with standard STD pulleys
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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