V-belt Optibelt B 138
- Brand
- OPTIBELT
- Category
- Power transmission
- Subcategory
- V-belts
- Section
- B
- Series
- VB / Red Power
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Tell us the quantity you need and request a quote by WhatsApp or email.
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 →
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Description
OPTIBELT B 138 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 138 and any equivalents.
The Optibelt B 138 is a classical V-belt from the VB / Red Power series, built to profile B with a 3581 mm length. Before you fit it, take a few minutes on the drive: worn sheave grooves will shorten the life of any new belt, regardless of make.
Inspect each sheave for groove wear, scoring, and buildup of rubber dust or debris. A groove that has worn wide lets the belt sit too deep, so it slips and runs hot. Check that the sheaves are aligned and that the grooves are free of burrs or sharp edges that can cut the belt sidewalls. Confirm the belt sits at the correct height in the groove rather than bottoming out.
Check the rest of the drive while it is down: keys and keyways, bushing tightness, bearing play, and the condition of the guards. Verify the take-up range so the new belt can be tensioned correctly and re-tensioned after run-in. If the old belt failed early, look for the cause before installing the replacement.
The B 138 carries a 17 mm top width, 11 mm height, and 40 degree angle, with a 3581 mm length. The same size is also listed under Stark as B 138. Send the part number and the quantity you need by WhatsApp or email, and we will confirm the right belt or suggest an equivalent.
Dimensions
- Section
- B
- Length
- 3581mm
Frequently asked questions
- What are the dimensions of the Optibelt B 138?
- It is a profile B classical V-belt with a 3581 mm length, 17 mm top width, 11 mm height, and 40 degree angle.
- How do I quote this belt?
- Send the part number B 138, the brand Optibelt, and the quantity you need by WhatsApp or email. We reply promptly and can help confirm the right belt or suggest an equivalent.
- What should I check on the drive before fitting it?
- Check sheave groove wear, alignment, and cleanliness, plus keys, bushings, bearings, guards, and the take-up range for correct tensioning.