Fastener Types - Xerox Phaser 3140 Service Manual

Fastener Types

Phaser 3140/3155/3160 Printer Service Manual
The following table lists the primary types of Posi-Drive screws used to assemble
the printer. The procedures provide dimensional specifications for screws being
removed.
Posi-Drive Screw Types used in the Printer
Type Application
Self-tapping,
plastic, black
Parts etc.
Self-tapping,
plastic, silver
Parts etc.
Self-tapping,
plastic with
flange, silver
Parts etc.
Sheet Metal,
silver
Parts etc.
Caution
Use care when installing self-tapping screws in plastic. To properly start the
screw in plastic, turn the screw counter-clockwise in the hole until you feel the
screw engage the threads, then tighten as usual. Always use the correct type
and size screw and properly align the screw to prevent damaging the tapped
holes. Do not use excessive force to remove or install either a screw or a printer
part.
Shape Characteristics
1. Black colored.
2. Screw thread is coarse
Coarse
3. Screw tip is thin.
Plastic
1. Silver colored.
2. Screw thread is coarse
Coarse
3. Screw tip is thin.
Plastic
1. Silver colored.
2. Screw thread is coarse
Coarse
3. Screw tip is thin. Screw has
Plastic
1. Silver colored.
2. Diameter is uniform.
Sheet
Metal
Service Parts Disassembly
compared to metal screw.
compared to metal screw.
compared to metal screw.
a flange.
8-5