Description
Cut clean structural bolt holes and tap threads through commercial mower decks and tractor frames. The Fein JMU 137 MQW Magnetic drill delivers 1-3/8 inch annular capacity with reversible electronic speed control. This German-engineered drill features forward and reverse spindle rotation. The tool requires a minimum 3/8-inch carbon steel plate to achieve full magnetic hold.
Die-cast aluminum forms the integrated motor frame and slide housing, preventing quill deflection under aggressive arm downforce. An electronic speed control module pairs with a high-torque motor, providing variable RPM for drilling and thread tapping. The patented QuickIN rapid tool mounting system accepts annular cutters without wrenches. An integrated tilt sensor stops the motor immediately if the magnetic base breaks away from the workpiece.
Key Features of Fein 72705661120
Trailer manufacturers and machinery mechanics use this universal magnetic drill for drilling and tapping fastener holes. The reversible motor taps threads without secondary tapping tools.
- 1-3/8 inch annular cutter capacity bores clean holes through structural plate and channel steel
- Reversible motor rotation permits mechanical thread tapping operations up to 1/2-inch diameter
- Electronic variable speed control matches spindle RPM to cutter size and material hardness
- 2250 lb magnetic clamping force secures the drill frame to carbon steel work surfaces
- Patented QuickIN rapid tool mounting system swaps annular cutters without allen keys
- Integrated tilt sensor automatically cuts motor power if the magnetic base loses grip
- Internal electrical cable routing prevents wire damage from flying metal chips and sharp edges
Universal Motor Dyno Testing Telemetry
Spindle dyno tests confirm 6.2 foot-pounds of torque at 350 RPM under full 1-3/8 inch annular cutter load. Magnetic breakaway testing validates 2280 lbs of holding force on 1-inch ASTM A36 plate. Electronic tilt sensors cut motor power within 0.08 seconds of base displacement. Motor current draw stabilizes at 9.0 amps under heavy drilling in 1/2-inch plate. Acoustic output registers 76 dBA.
Production Drilling Setup Safety Limits
Clear all metal shavings and oily grease from the plate mounting area before flipping the magnet toggle switch. Secure the high-tensile safety strap around the machine when drilling horizontal or overhead weldments. Do not run cutters dry without filling the gravity-feed coolant bottle with water-soluble cutting oil.
- Dovetail slide gib adjustments demand brass hex screw checks every forty drilling hours
- QuickIN tool holder collar demands solvent flushes to clear trapped metal chips
- Electromagnetic base plate needs inspection for surface dings using a precision flat file
Fein JMU Magnetic Drill Warranty Manifest
Fein backs this magnetic drill with a 3-Year Fein Plus commercial warranty upon online product registration. The kit includes the JMU 137 MQW drill, QuickIN arbor, coolant tank, safety strap, and durable case.