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Welcome to the World of Coated Abrasives

The most common type of coated abrasives known to many is probably the individual sheets of sandpaper of which many home wood workers use in furniture, building or crafts painting. Nevertheless, the commercial terminology of “Coated Abrasives” in reality encompasses a much wider array of applications & products, right from common hand-held sheet applied in auto ancillaries, fabrication, furniture, metal & general engineering, auto OEM and flooring, etc. up to huge machine that uses a 300-horsepower electric motor to drive belts of several feet wide. While these products may come in many forms, they all are essentially a single layer of abrasive grit/grain attached to a flexible backing.

The scope of coated abrasives used in commercial and industrial applications is staggering. Considering the abrasive grain type, backing, grit size, coat type (open, semi-open or closed), flex and product form (disc, sheet, flap wheel, belt), thousands of engineered abrasives are available to practically meet the application needs of just about all industrial use.

Why Is Abrasive So Important?

Selecting the right type of high-performing abrasives is getting more critical in the demanding commercial and industrial applications. Abrasive belts with strong and high durability backings are desirable for industrial applications. Belt failures will not only destroy valuable workpieces, companies will suffer great loss if parts such as the contact wheels, platens and other machine components are faulty due to the poor performance of the joints. If replacements are not readily available, then the lost production resulting from costly & unplanned downtime will adversely affect the company’s productivity.


Sand Tech Industries Sdn. Bhd. is a one-stop abrasives & jointing services provider. All abrasives jointing services and processes are carried out in our own factory in Muar, Johor to uphold the highest belt standards. We have a team of highly-skilled and experienced workers, with vast experience in the industry of abrasive jointing and belts supply.  Sand Tech Industries Sdn. Bhd. - The name you can count on for top-quality belts even for the most demanding applications!

Why is Strong Joint is So Important?

Considering the right type & method of jointing on your sanding belts is extremely important. This is due to the nature whereas no matter how well the belt is made, the joints can sometimes contribute to issues in the sanding process, some of which include: Belt Breakage, shedding and deterioration of the overall performance of the abrasive.

Abrasive belt joints are the weakest link of an abrasive belt – Most belt failures or breakages will occur at the joint. This is why it’s important to choose the correct joint for your belt – and perhaps more importantly – To choose a supplier who can make very strong, durable belts with proper jointing methods and quality assurances.

The Importance of Strong Abrasive Joints

As abrasive joints are the weakest link of an abrasive belt, therefore having a strong & reliable joint performance to prevent belt failures & breakages at the joint is important. The joints must be as strong as the actual sanding material and should not be too thick or too thin compared to the sanding material. The belt should also have the right shape and dimension. Most of all, choosing the right supplier who can make very strong, durable belts with proper jointing methods and quality assurances is very crucial!

Overlap Joint     


Mostly applied in sanding belts made from paper. An A-joint is an overlapping joint without compensation on the sand side, e.g. without interruption in the coating. It produces a uniform sanding belt thickness, even across the joint, and results in an even sanding finish without chatter


The most common joint for sanding belts with cloth backing. The B-joint is an overlapping joint with compensation on the sand side, whereas the joint area is free of abrasive material. This allows the cloth to overlap without having the joint to be thicker than the rest of the belt.

Butt Joint


Typically used & applied in small cloth belts that require both strength and flexibility.  A bottom-joint is cut through the sanding belt without an overlap, and the joint is attached with tape on the backing side.


This is a special joint whereas the tape is applied on the sanding side making it suited to profile sanding with a sanding pad.

Finger Joint

Finger Joint is most commonly used for sanding belts with cloth backing. The sine wave inter connection helps to reduce the impact of the joint on workpiece.