V-belt Optibelt B 51
- Brand
- OPTIBELT
- Category
- Power transmission
- Subcategory
- V-belts
- Section
- B
- Series
- VB / HVAC Power
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Other brands for this category
Ask us for alternatives. We check every equivalent against the part number and your application.
GATES and OPTIBELT: matching part numbers →OPTIBELT and STARK: matching part numbers →MITSUBOSHI and OPTIBELT: matching part numbers →
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Description
OPTIBELT B 51 belongs to v-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 B 51 and any equivalents.
The Optibelt B 51 is a classical V-belt with a B profile and a 1372 mm length. It measures 17 mm across the top, 11 mm in height, and has a 40° angle. This page helps you match it to the belt you are replacing.
Start by reading the marking on the back of the old belt. Look for the profile letter and the length number, such as B 51. If the marking is worn, measure the top width and height with a caliper and compare them to the 17 mm top width and 11 mm height of this belt. Also confirm the 40° angle where the belt sits in the pulley groove.
If the old belt is a B profile and the length matches 1372 mm, the Optibelt B 51 is the correct replacement. The same size is also listed under Stark B 51 and Mitsuboshi B 51. When replacing a belt on a multi-belt drive, install a full set of belts from the same brand and production run to keep loads even across the grooves.
Before installing, inspect the pulleys for wear, rust, or debris in the grooves. Check the alignment of the drive and the tension according to the equipment manual. A belt that runs hot, slips, or turns over often points to a worn pulley or incorrect tension rather than a belt problem.
Dimensions
- Section
- B
- Length
- 1372mm
Frequently asked questions
- How do I confirm the Optibelt B 51 is the right belt for my drive?
- Read the marking on the old belt. If it shows a B profile and a 51 length, this belt matches. If the marking is gone, measure the top width and height and compare them to 17 mm and 11 mm, and check the length against 1372 mm.
- What should I send to get a quote for this belt?
- Send the part number B 51, the brand Optibelt, and the quantity you need. If you are replacing a belt from another brand, include the old belt's marking and a photo of the drive if possible.
- Can I use this belt with other brands on the same drive?
- For drives with multiple belts, it is best to replace the full set with belts from the same brand and production run. Mixing brands or worn and new belts can cause uneven tension and premature failure.