Timing belt Optibelt 10 AT3 / 639 AP

OPTIBELT 10 AT3 / 639 AP belongs to timing belt, part of our Power transmission range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for 10 AT3 / 639 AP and any equivalents.

This page covers the Optibelt 10 AT3 / 639 AP timing belt from the Alpha Torque series. It has an AT3 profile, a 639 mm length and a 3 mm pitch. Use the details below to confirm it matches your drive before you request a quote.

When you send a quote request for this belt, include the full part number: 10 AT3 / 639 AP. Also state the profile (AT3), the length in millimeters (639 mm) and the pitch (3 mm) so we can check the specification against your application. If you are replacing a belt, the marking on the back of the old belt is the most reliable reference, so copy it exactly as it appears.

The 10 AT3 / 639 AP is a timing belt, also called a synchronous belt, used where tooth engagement and precise positioning are required. The AT3 profile and 3 mm pitch define the tooth shape and spacing. The 639 mm length is the datum length for this belt. These three values are the key dimensions to verify before ordering.

If you do not have the part number, send clear photos of the old belt and any drive details you have. Our team can help confirm the right belt or suggest an equivalent. We serve maintenance, engineering and purchasing professionals across the United States, Canada, Mexico and South America, and we reply promptly by WhatsApp or email.