BeltMatch: V-Belt FinderBeltMatch: V-Belt Finder
Find the exact V-belt you need in seconds.
Download on the App Store
Screenshots
Features
Calculate from pulley size or worn belt
Enter the reference diameter of both pulleys and the distance between their centers, and BeltMatch applies exact open-belt tangent geometry--no rough approximations. Alternatively, measure the top width and inside length of an existing belt and search by size.
See which belts fit and how far to move the shaft
Get a ranked list of catalog sizes from ISO/DIN standards (Z, A, B, C, SPZ, SPA, SPB, SPC). Each candidate shows exactly how much you need to move the motor--plus or minus a few millimeters--so you know the fit before you order.
Know the length basis, every time
Inside length, outside length, datum length, and effective length are all different. BeltMatch only compares like with like and always tells you which basis it used. This prevents the single most common reason for ordering the wrong belt.
Search by belt marking or dimensions
Type the marking from the belt itself--SPA1250, spa 1250, SPA-1250--and find it instantly. Cannot read it? Measure the width and inside length, and BeltMatch searches by size instead.
Keep a per-machine record with photos
Save each machine with a photo, model number, and location. Log which belt you installed, when, and how many. Next replacement takes seconds instead of reaching for the calipers again.
Offline, private, one-time purchase
Works completely offline once loaded--no account, no ads, no subscription. Your data never leaves your phone. Covers Optibelt's published ISO/DIN catalog (661 sizes).
Stop guessing which V-belt to order. BeltMatch turns pulley dimensions — or a worn belt you can still measure — into a shortlist of catalogue 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 a rough approximation
- See the required belt length, speed ratio and wrap angles
- Get the nearest catalogue 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
CATALOGUE COVERAGE
- Covers ISO/DIN sections: classical Z, A, B, C and narrow SPZ, SPA, SPB, SPC
- Sizes are from published Optibelt catalogue 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-off purchase. Nothing leaves your phone
- V-belts only. Timing, flat and serpentine belts are not covered
BeltMatch shows reference candidates from published catalogue 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.