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NMTG’s Product Solutions for Industrial Gearboxes
Gearboxes serve to the transmission and conversion of motion and energy in the form of speeds, torques, directions of rotation and forces. What provides for an precise and reliable execution of these functions are mainly the high-quality, high-performance locking device/Shrink Disc, Keyless Rigid Coupling, Holdback/backstop & Overrunning clutch design by NMTG.
Consistently designed to meet the requirements, our solutions are the preferred choice of leading gearbox manufacturers globally, for whom maximum precision, reliability and efficiency are the highest priority objectives.
NMTG Freewheel one-way clutch / Backstop Device / Holdback Device are designed to transmit torque in one direction, and overrunning (Freewheeling) in opposite direction.
The NMTG keyless rigid coupling consists of two connecting flanges: Male-female type, which together make up the NKF coupling as an assembly. Each coupling is locked onto its respective shaft by means of the keyless locking element. All parts of the Keyless locking element have splits and also have self-locking tapers. No fretting corrosion will occur on the locked contact surfaces.
NMTG Keyless Flange Coupling consists of two connecting flanges: Male-female type, which together make up the N5571 coupling as an assembly. The main function of the flange coupling is the safe and backlash-free connection of two shafts by means of friction. The flange coupling is simply pushed onto the shaft and fastened so it is frictionally engaged by tightening the screws in the shrink disc. They transfer torque and bending moments as well as axial and radial forces.
Application Example
Dual drive systems often have two drives that rotate at different speeds; these are referred to as two speed drive systems. In a two speed drive system, it is common to operate at two different speeds; high speed and low speed.
The overrunning clutch engages machines or machine parts and automatically interrupts their contact as soon as the driven part of the overrunning clutch is turned faster than the driving part.
The overrunning clutch / Coupling can be used to connect dual drives where there are two alternative motors driving a common gearbox input shaft, for example. The inner/Outer race should normally be mounted on the shaft which will be running for long periods at a relatively high speed, while the outer/Inner race is stationery. A clutch should be used when higher over running speeds are required and / or maintenance will be infrequent. With overrunning clutches the engagement takes place in the driving operation (torque transmission), while in freewheeling operation the torque transmission between the inner and outer ring is interrupted. In driving operation the speeds of the inner and outer ring are equal, while in free - wheeling operation they are different.
NMTG offers Sprag type Freewheel one-way clutch for SMSR Gearbox (Shaft Mounted Speed Reducer) to prevent reverse rotation of the shaft. This Holdback clutch mainly located on opposite end of the drive shaft. SMSR Gearbox is used in bucket elevator or inclined conveyor application where requirement of Holdback clutch is essential.
