Suitable Replacement Stihl 021 Crankshaft and Bearings Parts
Here is some general information about the purpose and function of these parts that may include the Stihl 021 crankshaft and bearings. The connecting rod can be either forged
or cast. The rod can be one piece or made from two pieces. The
connecting rod has needle bearings so that the connecting rod rides
on the crankshaft rod journal. The piston is fastened to the
connecting rod by a wrist pin supported by a needle bearing.
Performance Parts Supply air filters meet or exceed OEM specifications for Stihl 021 crankshaft and bearings and they cost less than OEM replacement parts
while maintaining excellent quality and durability. Extremely high chain saw RPMs drive the need for ball bearings and needle bearings on the crankshaft, connecting rod and wrist pin. At full throttle, the RPM of the engine can be nearly 15,000 [depending on the saw and manufacturer]. This equates to 250 revolutions per second.
The Stihl 021 crankshaft has two other purposes. It provides a fastening point for the flywheel which controls inertia, spark timing, and cooling. The second purpose involves transmitting power from the crankshaft to drive the chain via a sprocket. The crankshaft will have a centrifugal clutch that is usually screwed into the crankshaft, keyed on, or tapered fit.
The Stihl 021 bearings used on the crankshaft are rated for high speed and are a close tolerance bearing. The needle bearings are designed for high speed and close tolerance and can be either a caged needle bearing or a loose needle bearing.
The crankshaft has seals that ride on the crankshaft to keep outside air from entering the crankcase and to keep the fuel charge in the crankcase for the engine.
Important Notice - We are not affiliated with any chainsaw manufacturers and we do not attempt to make any affiliations with them. Any manufacturer logos, model names and numbers are the sole property of their respective owners and are used here for the sole purpose of reference. We do not sell OEM chainsaw parts for any brand. We do however, offer high quality suitable replacement parts guaranteed to meet or beat OEM part specifications like our suitable replacement Chainsaw Stihl 021 Crankshaft & Bearings we offer for sale for you to buy and put into their brand of chainsaws.