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Technical Support

Please direct your service related queries and questions to the following email address:


+4141761 5922


Please read through the questions. Some of the answers may provide you with the support you are looking for.

Q: Where may I buy B&J products?

A: Through your local tyre and retread supplies distributor. If you are not aware of our local distributor in your country, please contact B&J:


Q: How long should rasp blades last?

A: There is no set number of tyres you can buff with one change of blades. The most consistent part of your buffing operation is the quality and life of the B&J blades you are using. The most inconsistent part of your operation is the tyre you’re buffing. Different rubber compounds, how well the tyre is cleaned of foreign materials (stones, nails, etc.), the condition and amount of rubber remaining on the tyre and various operator techniques. All or any one of these will affect your total tyres buffed per rasp. Over time and many tyres, you’ll be able to ascertain and an average number of tyres per rasp for your particular operation.


Q: What is the correct finished texture for retreading?

A: The Rubber Manufacturers Association (RMA) recommends a texture of 3-4, as shown on their texture mat.


Q: How do I get a finer texture?

A: Changing to finer tooth blades and/or narrower spacers between blades may attain a finer texture. For example in R115-16 the 16 indicates that there are 16 teeth per segment. If you want a finer texture, you simply switch to R115-20 or even 25. However, a finer tooth might influence refill lifetime when buffing hard rubber. A good reference is to use R115-16 for OTR / Deep Lug Pattern, R115-20 for truck tyres used in construction and R115-25 for truck tyres used for long distance. Certainly B&J offers also multi purpose refills as well as specialized refill types. Contact us for a detailed recommendation.


Q: How do I get a courser texture?

A: Changing to a larger tooth blade with fewer teeth and/or increasing the spacer size betweens blades may lead to a courser texture.


Q: How many blade sets are in box?

A: 50, in most cases.


Q: How many blades are in a set?

A: This will vary depending on blade size and model number. Most blades have between 25-30 blades/set.


Q: When should I change my spacers?

A: If you are experiencing rough texture or tooth/blade breaking, please first be sure the rasp is properly tightened. If your used blades show an outline of the spacer, this can be an indication of worn spacers and/or pins. Check the dimension of each end of the spacers. Always replace all spacers at the same time.


Q: When should I replace pins?

A: Pins should be inspected each time you replace the rasp blades. If you find pins with cut marks on the backside, the pins should be replaced. If the pins are loose, the hub should be returned to B&J for possible rebuilding or replaced altogether for safety reasons. Never operate a rasp with loose pins.


Q: Can I replace pins myself on a convex, curved pin rasp?

A: No, all convex type rasps, such as Matteuzzi, must be returned to B&J to have the pins properly aligned during installation.


Q: Is it safe to use other blade brands in my B&J rasp?

A: No, it is not safe! All B&J parts are made to the highest quality standards to assure maximum usage and safety. Use of non-B&J component parts in a B&J rasp assembly may cause breakage and serious injury from flying parts. Non- B&J blade usage will void any and all B&J warranties.


Q: May I buy my rasp blades directly from B&J?

A: No, B&J maintains a large network of distributors for sale of our rasp blades. Please contact us under if you have difficulties finding a local source.


Q: If I am using a competitive blade, how will I know what model B&J blade to order?

A: Contact your distributor or B&J and the product will be cross-referenced on a blade chart.


Q: What is a detreader blade?

A: A detreader blade has the entire teeth bend on an angle. It is primarily, but not exclusively, used on Bandag buffers on the outside rows, 4 blades on each side. Detreaders are used when very fast, aggressive buffing is desired in a high production shop.