Timing belt Optibelt 12 AT3 / 639
- Brand
- OPTIBELT
- Category
- Power transmission
- Subcategory
- Timing belts
- Series
- Alpha Torque
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Description
OPTIBELT 12 AT3 / 639 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 12 AT3 / 639 and any equivalents.
This Optibelt Alpha Torque timing belt is identified by the code 12 AT3 / 639. It has an AT3 profile and a length of 639 mm, with a pitch of 3 mm. Before you fit it, inspect the drive and the sheaves so the new belt runs true and lasts.
Check the sheaves for wear, burrs, or debris in the grooves. Any roughness or buildup can damage the belt teeth and shorten service life. Confirm that the sheaves are aligned and that the bearings turn freely. If you see unusual wear on the old belt, correct the cause before installing the new one.
Verify that the drive is clean and that all components are in good condition. A worn tensioner or a misaligned pulley will affect how the new belt seats and tracks. Once the drive is ready, fit the Optibelt 12 AT3 / 639 and set the tension according to your equipment requirements.
For a quote, send the part number 12 AT3 / 639 by WhatsApp or email. If you need help confirming this belt or finding the right one for your drive, include the profile and length from the old belt. Our team responds promptly.
Dimensions
- Profile
- AT3
- Pitch
- 3mm
- Length
- 639mm
Frequently asked questions
- What are the profile and length of this belt?
- The Optibelt 12 AT3 / 639 has an AT3 profile and a length of 639 mm. Its pitch is 3 mm.
- How do I request a quote for this belt?
- Send the part number 12 AT3 / 639 by WhatsApp or email. Our team will reply promptly with a quote.
- What should I check before installing a new timing belt?
- Inspect the sheaves for wear or debris, confirm alignment, and make sure the bearings and tensioner are in good condition. Correct any issues before fitting the new belt.