Power Mechanics Study Guide

Adjustable Reamer

Reamers feature replaceable blades that slide along a taper, allowing user to manually dial in various hole sizes within a specific range.

Expansion Reamer

Adjustable reaming tool with tapered cutting blades and expansion mechanism that compensates for wear by slightly increasing diameter (up to 0.010 inches) for precision hole finishing.

Compression Gauge

Dial-type pressure gauge with threaded fitting, measuring fluid or air compression from 0–300 psi, used for testing pressure levels.

Impact Wrench

Power tool with pistol-grip body and square drive anvil (3/8", 1/2", 3/4") that delivers high-torque impacts to quickly loosen or tighten fasteners.

Power Timing Light

Handheld pistol-grip diagnostic tool with trigger, cables, and strobe lamp that connects to 6V or 12V ignition systems to flash timing marks for adjustment.

Spark Plug Gauge Set

Set of wire or feeler gauges used to measure and adjust spark plug electrode gaps, typically ranging from 0.020 to 0.040 inches.

Tachometer

Handheld measuring instrument with dial or digital display used to measure rotational speed (RPM) of engines, tools, or machinery during operation.

Torque Wrench

Precision hand tool with long metal handle, ratcheting or beam-style head, and 1/4", 3/8", 1/2", or 3/4" drive used to tighten fasteners to a specified torque.

Pneaumatic Grease Gun

Portable pneumatic grease gun that connects to an air line, using compressed air to deliver grease under pressure for lubricating fittings and machinery.

Lever Action Grease Gun

Hand-operated grease gun with lever mechanism, filled by hand, cartridge, or pump, used to manually apply lubricant under pressure.

Zerk Grease Fitting

High-pressure grease fitting with ball check valve that allows grease gun to snap on securely, enabling controlled lubrication of mechanical components without backflow.