Big bell universal with flexible joint and drive shaft to connect into a gear or motor. Drive shaft is square. It has a zinc plate with 4 holes to be fixed in the roller shutter housing. Can also be used for inside operation of exterior mounted security rolling shutters. Requires crank handle #6408. If you are looking to replace an existing part and are unsure if you are using a small or big bell; measure the thickness of the bullet that your crank handle grabs onto. This universal is a big bell; the bullet should be 13.9mm. Small bells are 11.9mm and will not use the same crank handle.
Product Codes:
6242-8MM SQ
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