Overview
The Stearns 104816101BP brake assembly is a standard motor brake designed for direct mounting to NEMA 48C frame motors. Manufactured by Stearns Division (Regal Rexnord), this spring-set brake delivers holding and stopping torque for motor brakes in industrial automation and machinery applications requiring safe load holding and controlled stopping.
Key Features
- Spring-set, electrically released design—proven fail-safe braking for emergency stops
- Manual wear adjustment—maintains consistent torque output as friction discs age
- Adjustable torque—allows field tuning to match load requirements
- Side manual release lever with automatic reset—provides manual override capability
- Class B coil installation—standard induction brake coil assembly
- NEMA 2 enclosure rating—protects against dripping or splashing water (IP23)
- Lead wire 24″ long—simplifies integration into motor enclosures or control panels
Technical Specifications
- Part Number: 104816101BP (also listed as 1-048-161-01-BP or 48BK6101BP)
- Torque Rating: 3 ft-lbs (holding/stopping torque)
- Voltage: 115/208/230 V AC, 60 Hz
- Motor Frame Size: 48C (direct-mount brake)
- Shaft Bore Diameter: 0.625 inch
- Outer Diameter: 5.50 inches
- Housing Length: 3.92 inches
- Enclosure Type: NEMA 2 / IP23
- Maximum Horizontal Speed: 5000 rpm
- Mounting: Horizontal mounting, direct C-face mount to 48C motors
- Release Mechanism: Manual lever release with automatic reset
- Lead Wire Length: 24 inches
Typical Applications
- Conveyor and material handling equipment—load holding and emergency stops
- Hoists and lifts—safe load suspension and controlled lowering
- Fans and blowers—controlled shutdown without coast-down
- Machine tool spindles—holding loads during power loss
- Pump drives—preventing reverse flow and siphoning
- Industrial motors requiring safe fail-safe braking
Compatibility & Replacements
Compatible With
- NEMA 48C frame motors (direct-mount configuration)
- 48C frame motor enclosures and motor starters
- Standard 115/208/230V, 60 Hz industrial motor control circuits
- Horizontal motor shaft configurations up to 5000 rpm
Replaces / Drop-In Replacement For
- 48BK6101BP (equivalent Stearns model designation)
- 1-048-161-01-BP (alternate Stearns numbering system)
Works With
- Stearns motor brake control circuits and electromagnetic braking systems
- Standard AC industrial motor starters and soft-starters
- Programmable logic controller (PLC) output circuits for brake energization
- Variable frequency drives (VFDs) with brake control outputs
