
Timing belt Optibelt 100 / 8M 4000 AFX
- Brand
- OPTIBELT
- Category
- Power transmission
- Subcategory
- Timing belts
- Series
- Alpha Flex
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Description
OPTIBELT 100 / 8M 4000 AFX 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 100 / 8M 4000 AFX and any equivalents.
When the marking on a timing belt is worn or unreadable, matching the belt starts with the profile and length. This Optibelt Alpha Flex belt is identified as 100 / 8M 4000 AFX, an HTD 8M profile with a length of 4000 mm and a pitch of 8 mm. Use those details to confirm the belt on the drive before you request a quote.
The easiest way to read a timing belt is to look for the print on the back of the belt. The code 100 / 8M 4000 AFX tells you the profile and the length: HTD 8M, 4000 mm, 8 mm pitch. If the print is gone, measure the old belt or check the drive documentation for the same profile and length.
A timing belt is a synchronous belt, so the teeth must match the pulley grooves exactly. The HTD 8M profile and 4000 mm length are the key selection points for this Optibelt Alpha Flex belt. If the old belt shows a different profile or length, do not force a match; send us the numbers you have and we will help confirm the right belt or suggest an equivalent.
Dimensions
- Profile
- HTD 8M
- Pitch
- 8mm
- Length
- 4000mm
Frequently asked questions
- What should I send to request a quote for this Optibelt belt?
- Send the part number 100 / 8M 4000 AFX, or the profile and length from the old belt: HTD 8M, 4000 mm, 8 mm pitch. Photos of the back marking and the pulley grooves also help.
- Can I use this belt if the old marking is unreadable?
- Yes. Measure the length and check the profile against the pulley. This belt is HTD 8M with a 4000 mm length and 8 mm pitch. If you are unsure, send us what you have and we will help confirm.
- Is this a timing belt or a serpentine belt?
- This is a timing belt, also called a synchronous belt. It has teeth that mesh with pulley grooves, unlike a Poly-V or serpentine belt.

