Power transmission
Frequently asked questions
Should I choose a belt drive, a chain drive or a direct coupling?
When the two shafts are in line, a shaft coupling gives the highest efficiency and needs little maintenance. Over a longer centre distance, belts run quietly and tolerate overloads through slight slip, while roller chain carries high torque at low speed without slip but needs regular lubrication. Synchronous belts are used where exact timing is needed without lubrication.
What information does KIT need to match a replacement power transmission part?
Send the code printed on the old part, measured dimensions (shaft diameter, pitch, length), motor power and speed, and a photo of the installation. For belt or chain drives, include the data of the mating pulley or sprocket, since the two parts must match. Quote requests go to sales@kit.com.vn.
Can I replace just one part of a worn drive?
New chain should not run on sprockets with worn teeth, and a new belt should not go into a sheave with worn grooves, because the new part wears to the old profile and fails early. Multi-belt drives need the whole set replaced at once so the belts share load evenly. For bearings and couplings, check alignment before replacing so the original cause of failure is not repeated.
How accurately must the motor shaft be aligned with the driven shaft?
Misalignment multiplies the load on bearings and wears belts, chains and couplings much faster. For belt and chain drives, both pulleys or sprockets must lie in the same plane, checked with a straight edge or a laser tool. For direct couplings, measure both parallel and angular offset with a dial indicator or laser shaft alignment system and adjust within the coupling maker's limits.
What safety measures are needed before servicing a drive?
Isolate and lock out the power source with a tag before removing guards, then confirm the machine cannot start. Release stored energy such as suspended loads, belt tensioner springs or hydraulic pressure in the drive train. After the work, refit belt, chain and coupling guards before any test run.
How should spare drive components be stored?
Rubber belts should be kept dry, cool, out of direct sunlight and away from ozone produced by electric motors, and not hung on small pegs that kink them. Bearings stay in their original packaging, stored flat and unopened until fitting to keep out dust and moisture. Chain, sprockets and sheaves should carry a rust preventive oil and be issued first in, first out.
