
Timing belt Optibelt AT3 501
- Brand
- OPTIBELT
- Category
- Power transmission
- Subcategory
- Timing belts
- Series
- Alpha Power
We reply promptly.
Tell us the quantity you need and request a quote by WhatsApp or email.
Can't find the exact model? Tell us the part number or model you need. We'll track it down and quote it, whether or not it appears in our catalog.
Description
OPTIBELT AT3 501 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 AT3 501 and any equivalents.
The Optibelt Alpha Power AT3 501 is a timing belt with an AT3 profile, a 501 mm length, and a 3 mm pitch. When you are replacing a belt, matching those three markings is what keeps the drive running as designed. We carry this belt and quote it by part number.
Start with the belt you are taking off. Read the marking printed on the back and compare it with the Optibelt Alpha Power AT3 501: profile AT3, length 501 mm, pitch 3 mm. If the old belt shows the same profile and length, this is the correct match for the drive. Do not rely on a visual comparison alone, because similar profiles can look alike on a worn belt.
If the marking is unreadable, measure the old belt and check the drive pulleys. The profile must match the pulley groove, and the length must match the path around the pulleys. The AT3 profile and 501 mm length on this belt are the two dimensions to confirm before ordering. The 3 mm pitch is part of the same specification.
Send us the part number, AT3 501, along with the profile and length from your old belt. If the numbers on your belt differ, send those instead and we will help confirm the right Optibelt timing belt or suggest an equivalent. A clear photo of the back marking is often enough for our team to check it.
Dimensions
- Profile
- AT3
- Pitch
- 3mm
- Length
- 501mm
Frequently asked questions
- How do I match the Optibelt AT3 501 to the belt I am replacing?
- Compare the profile, length, and pitch on the old belt with the AT3 profile, 501 mm length, and 3 mm pitch of this belt. If all three match, it is the correct replacement.
- What should I send to request a quote for this belt?
- Send the part number AT3 501, or the profile and length marked on your old belt, by WhatsApp or email. If your old belt has different numbers, send those and we will help confirm the right belt or suggest an equivalent.
- Can you help if the marking on my old belt is worn off?
- Yes. Send the profile and length you measure from the old belt, or a photo of the drive and the belt. We will check it against the AT3 501 and help you confirm the match.

