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* Using the face of a clamp-type collar as a bearing surface in a rotary application. The saw slot can quickly abrade the surface rotating against it.Doug/Zero-Max: Improper tightening of multiple screws can cause bushing slippage. Axial movement of the bushing on the shaft when tightening can cause some alignment loss. Some connections feature a single tightening screw flint can be torqued if necessary for proper clamping force.Best practicesWhat are considered "best practices" when designing with locking devices?Carl/Ringfeder: Aside from the obvious design parameters, engineers should ask the following questions:* What are the application requirements of the device?* Is the locking device only used to simplify installation or is adjustment, removal, or maintenance necessary? Component interactionsHow do locking device choices affect other areas of the machine or system?Andrew/Whittet-Higgins: The precision and life expectancy of a bearing, power transmission, or modern assembly is only as good as the precision of the individual components and the care in which they are put together.Blair/Ruland: It''s important to look at where and how the locking device is being used and whether adjustments may cause problems. Locking devices in general are not easy to remove and replace. Because of this, it may be advantageous to have necessary adjustments done from another section of the machine.Doug/Zero-Max: When using keyless locking devices, there are fewer application problems because there is no keyway failure or fatigue. Connections without keyways also have smaller shaft diameters, translating into shaft material cost savings. The single screw type can be tightened and repositioned many times without component wear or machine downtime. Total balanced braking is a product of torque or foundation balance, pneumatic pressure balance, pneumatic timing balance, and temperature balance.Torque balance. This deals with the hardware parts of a brake system. Factors that affect torque balance include: different angles between slack adjusters and brake chamber push rods, improper lining-to-drum contact, different size brake drums, mismatched brake return springs, different friction values of lining on the same axle, and improper brake adjustments. For a five-axle vehicle combination, a proper torque balance would have 20% of braking effort on the steer axle, 40% on the drive axles and 40% on the trailer axles. Pneumatic pressure balance. This pertains to the proper air pressure delivered equally to all wheels so that each wheel does its share of braking based on the proportion of weight being carried.
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