Timing belt Optibelt 8 AT3 / 639 AP

OPTIBELT 8 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 8 AT3 / 639 AP and any equivalents.

This Optibelt Alpha Power timing belt carries the part number 8 AT3 / 639 AP. It is a synchronous belt with an AT3 profile, a 639 mm length and a 3 mm pitch. It suits drives where a compact, positive-engagement belt is required and the original specification calls for this profile and length.

Where this type of belt is used: AT3 profile synchronous belts are common on small, precise drives in industrial equipment, packaging machinery, automation and similar applications. The 3 mm pitch and 639 mm length make this a specific fit, so confirm the drive accepts the AT3 profile before ordering.

How to confirm fit: read the marking on the back of the old belt. It should show the profile and length, in this case AT3 and 639 mm. Also check the pulley grooves are clean and undamaged, and that the belt width matches the pulley face. If the marking is worn or missing, measure the pitch length and count the teeth to cross-check against the 639 mm length and 3 mm pitch.

We carry the Optibelt Alpha Power 8 AT3 / 639 AP timing belt. To request a quote, send the part number 8 AT3 / 639 AP by WhatsApp or email. If you are unsure this is the correct belt, include the old belt marking and a photo of the drive, and our team can help confirm the right belt or suggest an equivalent.