BeltMatch: V-Belt Finder

Stop guessing which V-belt to order. BeltMatch turns pulley dimensions — or a worn belt you can still measure — into a shortlist of catalog belt sizes, and tells you exactly how far to move the motor to fit each one.

FROM PULLEY SIZES TO A BELT YOU CAN ORDER
- Enter both pulley reference diameters and the centre distance
- BeltMatch uses the exact open-belt tangent geometry, not the rough approximation
- See the required belt length, speed ratio and wrap angles
- Get the nearest catalog sizes ranked by how little you have to move the shaft

KNOW HOW FAR TO MOVE THE MOTOR
- Every candidate shows the real centre distance for that exact belt
- "+6.2 mm wider" or "-4.8 mm closer" — no trial and error at the machine
- Belts that cannot physically fit are never suggested

IDENTIFY A BELT YOU ALREADY HAVE
- Search by the marking printed on the belt — SPA1250, spa 1250 and SPA-1250 all find the same thing
- Worn off? Measure the top width and inside length instead and search by size
- Clear guidance on how to measure so your numbers mean something

GET THE LENGTH BASIS RIGHT
- Inside, outside, datum and effective length are not the same number
- BeltMatch only ever compares like with like, and always tells you which basis it used
- This is the single most common reason people order the wrong belt

KEEP A RECORD PER MACHINE
- Save each machine with a photo, model and location
- Log which belt went on, when, and how many
- Next replacement takes seconds instead of another trip with the calipers

CATALOG COVERAGE
- Covers ISO/DIN sections: classical Z, A, B, C and narrow SPZ, SPA, SPB, SPC
- Sizes are from published Optibelt catalog data
- North American sections (3V/5V/8V, 3L/4L/5L) are not included yet

BUILT FOR THE FIELD
- Works completely offline — no account, no ads, no subscription
- One-time purchase. Nothing leaves your phone
- V-belts only. Timing, flat and serpentine belts are not covered

BeltMatch shows reference candidates from published catalog data. It does not guarantee fit, stock or load rating. Always confirm against the machine maker's specification, and stop and isolate the machine before measuring.