Description
Fleet mechanics damage expensive bearings when pounding them onto motor shafts with hammers and drift punches. The Bessey Control Box Certified 725 Watt heater expands bearing inner races using controlled thermal energy. Sized for maintenance shops, it heats bearings from 3/8 to 8-1/4 inches inner diameter. It cannot heat sealed bearings with rubber contact seals without scorching them.
The heating element uses an aluminum step-cone core powered by a 725-Watt electric resistance coil encased in a protective control enclosure. An external magnetic temperature sensor attaches to the bearing inner ring, transmitting thermal data to the digital control box. Unregulated heat destroys bearing temper. This control unit regulates thermal ramp rates to keep temperatures below 250°F, preventing metallurgic hardness loss while expanding the race for smooth shaft mounting.
Bearing Heater Control Hardware Matrix
Maintenance technicians mount heavy bearings and drive gears onto machinery shafts. Controlled thermal expansion prevents race galling and shaft scoring during installation.
- 725-Watt electric heating element delivers uniform thermal conduction across bearing inner rings.
- Stepped aluminum cone design accommodates bearing inner diameters ranging from 3/8 to 8-1/4 inches.
- Digital control box maintains precise temperature cutoffs to protect metallurgical steel temper.
- Magnetic temperature probe attaches direct to the inner race for real-time thermal monitoring.
- Auto shutoff function cuts power once the target mounting temperature reaches 250°F.
- Non-magnetic heating process eliminates the need for demagnetizing bearings before installation.
- Compact benchtop profile fits on mechanic teardown benches alongside bearing pullers and presses.
Thermal Conduction Telemetry Bench Testing
Bench heating tests on a 4-inch inner diameter deep-groove ball bearing show a thermal rise from 70°F to 230°F in 9 minutes. Electrical current draw registers 6.0 Amps on standard 120-Volt single-phase shop power. Aluminum cone surface temperature stabilizes at 285°F under continuous control box regulation. Total bearing race diametrical expansion measures 0.0035 inches, providing free slide fit clearance over a cold steel shaft. Acoustic noise registers absolute zero dBA during silent electrical resistance heating operation in shop environments.
Shop Maintenance Bearing Work Boundaries
Never heat pre-lubricated bearings packed with standard grease because thermal breakdown degrades the lubricant and cooks rubber contact seals. Do not purchase this cone heater for heavy industrial sleeve bearings exceeding 8-1/4 inches inner diameter. Overheating bearings past 250°F destroys the heat-treat hardness of bearing steel rings.
- Clean the aluminum cone surface per week using a dry cloth to prevent carbon buildup.
- Inspect the magnetic probe cable every 30 days for frayed wiring or damaged sensor faces.
- Calibrate the temperature controller once per year using a certified contact pyrometer.
Bessey Commercial Warranty Package Inventory
Bessey protects this cone bearing heater with a 1-Year commercial warranty covering the electric heating coil, control box electronics, and temperature sensor. The packaged unit includes 1 aluminum cone heater, 1 digital control box, 1 magnetic temperature probe, 1 power cord, and 1 complete operational manual.