-
>
Gears, Differentials, Racks & Pinions
- Spur Gears
- Bevel Gears
- Miter Gears
- Racks
- Helical Gears
- Internal Gears
- Worm Gear Pairs
- Screw Gears
- Differentials
- Gear and Dial Hubs
- Gear Blanks
- Gear Clamps, Precision & Commercial
- Pinion Shafts
- Pinion Wire
- Spur Gear Stock
- Splines
- Cluster Gears
- Designing with Plastic Gears
- Helical Gears Technical Information
- Internal Gear Technical Information
- Planetary Gear Design
- Spur Gears Technical Information
- > Synchronous Drive Belts, Pulleys, & Cables
- > Couplings, Flexible Shafts, & Universal Joints
- > Chains & Sprockets
-
>
Shafts & Shaft Accessories
- Shafts & Drill Rods
- Sleeves, Hexagonal Hole
- Sleeves, Plain, Square Hole
- Sleeves, Partially Threaded, Square Hole
- Bushings, Square Hole, with Slit
- Stocks
- Shaftloc® - Sleeves, Pulleys & Accessories
- Bushings, Locking Hub
- Collars, Shaft
- Reducers & Extenders, Shaft
- Supports, Shaft
- Bore Reducers
- Ball Splines, Telescoping
- Shaft Lock, Nut Type Potentiometers
- Shaft Bushings, Taper
-
>
Bearings & Linear Motion Components
- Ball Bearings
- Linear Bearings
- Press-Fit Bearings
- Needle Roller Bearings
- Sintered Bronze Bars
- Sleeve Bearings
- Spherical Bearings
- Thrust Bearings & Washers
- Bearing Blocks
- Rod Ends
- Bearing Spacers
- Hydro-Dynamic Pressure Bearings
- Bearing Housings
- Frelon® Lined Flanged Aluminum Sleeve Blocks
- Ball Bearing Technical Information
- Ball Bearing Lubrication and Surface Finishes
- Plastic and Non-Metallic Bearings
- Porous Metallic Bearings
- > Motors, Gearheads, & Motion Control
- > Speed Reducers & Right Angle Drives
- > Hardware
- > Miscellaneous Components
- > Linear Guide Systems
- > Clutches & Brakes
- > Vibration & Shock Mounts
Power-On & Power-Off Brakes


A "power-on" brake is an electromagnetic brake that engages and applies braking force when power is applied, while a "power-off" brake is a brake that engages and applies braking force when power is removed, typically utilizing a spring mechanism to activate the brake when power is lost; essentially, a power-off brake acts as a failsafe mechanism to hold a load in place when power is cut off.
Power-on brake:
Activates when power is supplied to the electromagnetic coil.
Used in applications where immediate braking is needed upon power activation.
May require a higher power supply to generate sufficient braking force.
Power-off brake:
Activates when power is removed from the electromagnetic coil, relying on a spring mechanism to apply the brake.
Considered a "fail-safe" brake as it automatically engages when power is lost.
Commonly used in applications where holding a load in position is crucial even during power outages.