
Timing belt Optibelt DS8M 1240
- Brand
- OPTIBELT
- Category
- Power transmission
- Subcategory
- Timing belts
- Series
- STD
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Description
OPTIBELT DS8M 1240 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 DS8M 1240 and any equivalents.
This Optibelt DS8M 1240 is a double-sided timing belt from the STD series. It measures 1240 mm in length. Double-sided timing belts are used where a drive needs synchronized power from both faces of the belt.
Confirm fit by checking the belt you are replacing. Look for the part number on the back of the belt. The marking should read DS8M 1240. Also check that the belt is double-sided, meaning teeth are on both sides. This matters because a single-sided belt of the same length will not work in a drive that requires teeth on both faces.
The 1240 mm length is the datum you need when comparing against the old belt. If the old belt is worn or the marking is unreadable, measure the length and confirm the profile. The DS8M profile is a specific tooth shape, so the replacement must match that profile as well as the length. Send the part number and any photos of the old belt for confirmation.
Double-sided timing belts are common in reversing drives, where the belt must engage pulleys on both sides. They are also used in some serpentine or multi-pulley layouts that require synchronized motion from both faces. If you are unsure whether your drive takes a double-sided belt, check the pulley arrangement. A drive that uses both sides of the belt will have pulleys or idlers contacting the toothed faces.
Dimensions
- Length
- 1240mm
Frequently asked questions
- How do I confirm this belt fits my drive?
- Check the part number on the back of your old belt. It should match DS8M 1240. Also confirm the belt is double-sided, with teeth on both sides. If the marking is missing, measure the length and compare the profile.
- What does the 1240 mm length refer to?
- It is the length of the belt as listed for this part number. Use it to compare against your old belt or the drive specification. Do not convert to another unit; use the value as given.
- Can I use a single-sided belt instead?
- No. If your drive requires a double-sided timing belt, a single-sided belt will not engage both faces. Confirm the drive layout before ordering. If you need help, send the part number and details of your application.

