NTB system (new band saw cutting system)

New type band saw

Conventionally, saw blade requires roll tensioning and processing on the back to fit saw wheel during manufacturing by skilled mechanic. also he needs to provide the  maintenance work during use.

Our NTB band saw is designed to have a  processing on back evenly by simple grinding and joining the curved material custom-ordered to a special steel maker into an arch shape in our factory. this technology is already patented. 

in addition, during manufacturing we only apply special treatment on the blade which suppresses warping of saw blade instead of applying roll tensioning. 

we have succeeded in developing a band saw, which is extremely unlikely to be deformed during use and whose performance does not vary from one band saw to another. 

The band saw machine is a special cutting device in which a thin blade, which is band saw is not fixed with screws. the  required function of the band saw machine is to keep the band saw running stable and　prevent the blade from coming off. we have newly developed a high performance band saw machine that best matches NTB band saw which does not require roll tensioning. by using both as one set, it has become possible to realize ultra-high speed  lumbering that far exceeds conventional methods. The NTB band saw machine incorporates many new designs and know-how such as vibration characteristics, saw wheel surface shape and durability, saw wheel rotation performance, consideration for saw guide and sawdust.

High speed band saw machine

The NTB system facilitates faster sawmilling speeds and improves sawmill production. For example, if a single 3m lumber runs four times at a sawmilling rate of 35 m/min and the cycle time is 54 seconds, the cycle time will be 44 seconds if the sawmill runs at a high speed of 70 m/min, resulting in a drastic increase in output of more than 22%. ( In the running test, the saw is replaced once per shift.) In addition, by increasing the number of cuts of the head machine, we can expect to reduce the number of machines in the next process and save costs by leaving space and manpower out. Furthermore, the occurrence of saw cracks and the appearance of poorly performing saws are extremely reduced, and the production interruption time is also reduced.

In conventional band saws, plastic deformation is partially applied to adjust the waist insertion amount and back amount, so if the width of the saw blade decreases due to re-grinding, the balance will be lost and the shape will be changed. Also, there are problems such as saw cracks that are likely to occur depending on the way the waist is put in, which requires troublesome correction work for saw doctors. This technic requires long study, rich experience, good sense and is really a process where one can show his best abilities. We can say, this technic is highly depending on the personality of the saw doctor. The NTB band saw frees you from this cumbersome work, allowing the mechanic to concentrate on the finishing work, making it easier to consistently supply high-performance band saws, which enables consistent and stable lumber production.