Timing belt Optibelt 85 / 8M 4200 AFX
- Brand
- OPTIBELT
- Category
- Power transmission
- Subcategory
- Timing belts
- Series
- Alpha Flex
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Description
OPTIBELT 85 / 8M 4200 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 85 / 8M 4200 AFX and any equivalents.
This Optibelt Alpha Flex belt is a timing belt in the HTD 8M profile with a length of 4200 mm and a pitch of 8 mm. It is the type of synchronous belt used on drives where the belt teeth mesh with matching pulleys to keep the driven shaft in step with the driver. Confirming fit starts with the marking on the back of the belt you are replacing.
Timing belts of this size turn up on industrial drives rather than on light duty equipment: process machinery, plant conveying, and other lines where a positive drive is required and the pulley centers are long enough to take a 4200 mm belt. The HTD 8M profile is a curvilinear tooth form, so the belt runs on pulleys cut to the same profile. A belt from a different profile will not seat correctly even if the length is close.
To confirm the belt on your drive, read the marking on the back of the old belt and compare it with the Optibelt 85 / 8M 4200 AFX number. Check the profile and the length against the drive data, and inspect the pulleys at the same time for worn teeth, buildup in the grooves, and alignment between the two shafts. If the marking is worn off or unreadable, measure the outside length and count the teeth, and note the pulley part numbers.
When you request a quote, send the part number, the profile, and the length, along with a photo of the belt marking if you have one. Our team replies by WhatsApp or email and can help confirm the right belt or suggest an equivalent.
Dimensions
- Profile
- HTD 8M
- Pitch
- 8mm
- Length
- 4200mm
Frequently asked questions
- How do I confirm this is the belt on my drive?
- Read the marking on the back of the belt you are removing and compare it with the Optibelt 85 / 8M 4200 AFX number. Also check that the pulleys are cut to the HTD 8M profile with an 8 mm pitch and that the belt length matches the drive.
- What do I send to get a quote?
- Send the part number, the belt profile, and the length, plus a photo of the marking on the back of the belt if it is still readable. If the marking is gone, send the outside length, the tooth count, and the pulley part numbers.
- Should the belt be replaced on its own?
- Check the condition of the pulleys and the rest of the drive before you fit a new belt. Worn pulley teeth, buildup in the grooves, and misalignment will shorten the life of any replacement, so deal with those points while the drive is open.