
Timing belt Optibelt 3M 129
- Brand
- OPTIBELT
- Category
- Power transmission
- Subcategory
- Timing belts
- Series
- Omega
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Description
OPTIBELT 3M 129 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 3M 129 and any equivalents.
The Optibelt Omega 3M 129 is a timing belt with an HTD 3M profile, a 129 mm length and a 3 mm pitch. When you read the marking on the back of the old belt, these are the values to match. If the marking is worn or unreadable, send what you can read to MR for help confirming the right belt.
A timing belt marking usually shows the profile and the length. On this Optibelt Omega belt, the profile is HTD 3M, the length is 129 mm and the pitch is 3 mm. Compare those figures with the old belt before you order. If the belt has been running in a drive with little clearance, the marking may be faint, so check both the back of the belt and any drive documentation you have.
When you request a quote, include the part number 3M 129 and the profile HTD 3M. If the old belt carries a different marking or you are unsure which value is the length, send a photo of the belt back and the drive. The MR team replies by WhatsApp or email and can help confirm the right belt or suggest an equivalent.
Dimensions
- Profile
- HTD 3M
- Pitch
- 3mm
- Length
- 129mm
Frequently asked questions
- How do I read the marking on an Optibelt Omega timing belt?
- The marking on the back of the belt identifies the profile and the length. For this belt, the profile is HTD 3M and the length is 129 mm. The pitch is 3 mm. Match those values to the old belt before ordering.
- What should I send to request a quote for the 3M 129?
- Send the part number 3M 129, the profile HTD 3M and the length 129 mm. If the old belt marking is hard to read, include a photo of the belt back and the drive so the team can help confirm the right belt.
- Can MR help if the marking on my old belt is unreadable?
- Yes. Send the part number you have, any partial marking and a photo of the belt and drive. The team can help confirm the profile and length and suggest an equivalent where one applies.

