Article by: BIG DAISHOWA SEIKI CO., LTD.
Tool holding system has been developed continuously in order to meet the demands in the quality of workpiece surface, the accuracy, the precision as well as the quality of machines and tools used so that the operation is done in a suitable manner with the maximum benefit.
BIG-PLUS® Spindle System is exclusively licensed by BIG DAISHOWA SEIKI CO., LTD. It is a tool holding technology worth the attention of the industry because this system can contribute to the maximum efficiency in the manufacturing process. It received 23rd Invention Grand Prize/Ikemoto Award for distinguished Invention.
Big-Plus® Spindle System: Dual contact system
BIG -PLUS® Spindle System is special and unique in that this system creates simultaneous dual contact between the taper and flange face by establishing a complete gauging system. It has been used by 67 manufacturers in Japan and by 96 companies from overseas.
Here are the advantages of using BIG-PLUS:
* Improved surface finish and dimensional accuracy
* Extended tool life
* Prevention of fretting corrosion caused by heavy cutting
* Improvement of ATC repeatability
* Elimination of Z-axial movement at high speeds
* Improved roundness of boring operations
Draw-in amount of the holder is the key to perfect face contact
Before the holder is clamped, there is a slight clearance at the flange face. Axial movement of the clamping equipment causes the taper of the spindle to expand, achieving perfect face contact. Therefore, draw-in amount of the holder is essential to achieve perfect face contact.
Increased contact diameter provides more rigidity
A conventional BT tool holder is supported on a reference diameter called the gauge face. On the contrary, a BIG-PLUS tool holder is supported on the flange face which brings remarkable improvement to rigidity.
Strict gauge control through established gauge system
BIG-PLUS spindles are produced by licensed machine manufacturers or spindle builders which are strictly controlled in dimensions by the BIG MASTER GAUGE. Only the trademarked BIG-PLUS HOLDERS can achieve the optimal performance of these spindles fully and safely.
MEGA CHUCK SERIES PAT. uses BIG-PLUS technology
MEGA CHUCK SERIES PAT. is a tool holder for high speeds and its used dual contact technology by BIG-PLUS to achieve ultimate tool balance and reduce run-out. The periphery has been thoroughly polished. Moreover, the balance inspection has been done by using a high-precision dynamic balancer.
Notch-free design MEGA NUT prevents vibration and reduces noise. Moreover, the unique Mega wrench makes nut fastening work easier with a one-way clutch system which can apply force evenly to the entire nut periphery for safe and secure tightening. In addition, the ratchet feature offers outstanding workability and reduces the burden of nut tightening work.
Using high technology is an important strategy to be at an advantage in a competitive climate which is likely to become fiercer. Big-Plus® Spindle System is the technology to support tool holding operations to achieve efficiency and to keep up-to-date with the current machining trend.