SEW-Eurodrive Brake BMG1 10Nm – Part No: 08671427

Overview

SEW-Eurodrive part number 08671427 is a SEW-Eurodrive BMG1 brake, a spring-applied disc brake with 10 Nm braking torque, supplied in the BMG1 HF version with a coil for 400 V AC supply (167 V DC at the coil after rectification). The BMG1 is one of the smaller sizes in the SEW-Eurodrive BMG brake range. It fits on the non-drive end of SEW AC motors and gearmotors and holds the load whenever the motor is stopped or the supply is lost.

The brake works on the fail-safe principle. Compression springs press the brake disc against the friction surface when the coil is de-energised. When DC voltage reaches the coil through the SEW brake rectifier, the brake releases so the motor can run. Because the brake applies automatically when power is removed, it holds position during normal stops, emergency stops and power failures.

Key Features

• BMG1 spring-applied, electromagnetically released disc brake
• 10 Nm braking torque
• Coil for 400 V AC supply, 167 V DC operating voltage via SEW brake rectifier
• Fail-safe: applies automatically when the coil is de-energised
• HF variant designation per SEW order data
• Friction disc and air gap serviceable during routine maintenance

Technical Specifications

Applications

• Holding brakes on belt and roller conveyors, including inclined conveyors
• Small hoists, lifting tables and vertical axes where the load must not drift
• Positioning drives and gate or door drives
• Material handling and packaging lines in oil & gas, water, cement and logistics facilities

SEW-Eurodrive BMG1 Selection Notes

In the SEW operating instructions for DT/DV motors, the BMG1 is the brake assigned to motor size 80, with a maximum braking torque of 10 Nm. The torque is set by the spring combination: six standard springs give 10 Nm, four standard plus two red springs give 7.5 Nm, and three of each give 6.0 Nm. A replacement brake should therefore be checked against the torque on the motor nameplate, not only against the brake size.

The coil is matched to the supply voltage. For the 400 V AC range (370-414 V) the corresponding DC value is 167 V, and the holding current is 0.15 A measured in the supply lead to the rectifier. For 24 V DC supply on brake sizes BMG05 to BMG4, the standard control unit is the BS24; with AC supply it is a BG rectifier. In SEW type codes, HF stands for the lockable manual brake release and HR for the self-reengaging manual release.

SEW-Eurodrive BMG1 Inspection and Maintenance Notes

SEW specifies inspection of BMG05-BMG8 brakes at least every 3000 operating hours when the brake is used as a working brake, and every 2 to 4 years, depending on conditions, when it is used as a holding brake. The inspection covers brake disc thickness, lining, working air gap, pressure plate, carrier and pressure rings, and removal of abraded material.

The working air gap must stay between 0.25 and 0.6 mm. The brake disc is replaced when its thickness is down to 9 mm on brake motors up to size 100. On versions with manual release, the floating clearance between the conical springs and the setting nuts must be set to 1.5 mm so that the pressure plate can follow lining wear.

How the SEW-Eurodrive BMG1 Brake Works

The SEW-Eurodrive BMG1 brake is a DC-operated electromagnetic disc brake. The brake disc is keyed to the motor shaft through a carrier and sits between the pressure plate and the friction surface on the motor end shield. With the coil de-energised, the compression springs push the pressure plate against the disc and the friction linings transmit the braking torque to the motor housing. When the brake rectifier supplies DC voltage to the coil, the magnetic field pulls the pressure plate back against the spring force, the disc runs free and the motor can turn.

Because braking torque comes from the springs rather than from the electrical supply, the brake holds the load when the supply fails. This is why spring-applied brakes are used on vertical axes, inclined conveyors and other drives where an uncontrolled movement would be unsafe.

Typical Signs That a BMG1 Brake Needs Service

• The brake does not release: check the rectifier, coil supply voltage, coil continuity and air gap.
• The brake slips or stopping distance increases: check lining wear, the air gap and the spring set against the torque on the nameplate.
• Delayed application: check the switching arrangement (AC-side or DC-side switching) of the brake circuit.
• Noise or heat at the non-drive end: check for worn linings, abraded material or a dragging disc.

Typical Applications in Oman & the GCC

SEW brake motors are widely installed on conveyor systems, bagging and palletising lines, water and wastewater plant drives, cement and building material handling, and utility equipment in oil and gas facilities. High ambient temperatures and dust in the region make regular checks of air gap and lining wear particularly important, and keeping a correct spare BMG1 brake on site shortens downtime when a brake has reached its wear limit.

Why Seven Star LLC

Seven Star LLC supplies SEW-Eurodrive BMG brakes and matching brake rectifiers for maintenance programmes across Oman and the GCC. Before we quote, we check the brake size, torque and coil voltage against your motor and brake nameplate data. A brake of the wrong size or voltage will not hold the load correctly.

Also available: SKF 6206-2RS1 Deep Groove Ball Bearing

Request a Quote for SEW-Eurodrive Brake BMG1 10Nm – Part No: 08671427

Submit a formal inquiry through our RFQ page with part number 08671427, the quantity, the complete SEW motor nameplate data (type and serial number), the brake coil voltage and the type of brake rectifier fitted. We will confirm the correct SEW-Eurodrive BMG1 brake configuration and respond with a formal quotation.

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