Hougen Mag Drill Spindle Adapter 08186/10731 Keyed Chuck Kit (Slot Drive 3/8-16 UNC Steel Twist Bit Boring HMD904 HMD905 HMD927 Magnetic Press)

Hougen 08186 Slot Drive Spindle Adapter and 10731 Industrial Keyed Drill Chuck Kit

The Hougen 08186 Spindle Adapter and 10731 Keyed Drill Chuck Kit converts Hougen HMD904, HMD905, and HMD927 portable magnetic drills from proprietary annular cutter tooling to standard straight-shank twist drill bits. Precision-machined from heat-treated industrial tool steel with a 3/8-16 UNC threaded interface and Slot Drive arbor connection, this dual-component system secures twist drills to prevent bit slippage and eliminate runout during heavy structural steel boring. Engineered to handle high torsional loads across metal fabrication shops and field ironworking sites, this conversion assembly equips operators to drill smaller pilot holes, clean out existing fastener bores, and expand mag drill functionality without requiring additional power tools.

Best Used For:

• Small-Diameter Hole Drilling: Sinking straight-shank twist drill bits into structural I-beams, plate steel, and angle iron where large annular cutters are impractical.
• Fastener Bore Clean-Out: Re-drilling, deburring, and sizing out existing bolt holes on industrial machinery and commercial building frameworks.
• Field Fabrication Versatility: Transitioning between high-speed hollow core cutters and conventional jobber drill bits directly at the jobsite workpiece without changing magnetic drill units.

Key Performance & Safety Features

• Integrated Dual-Piece Architecture: Pairs the 08186 Slot Drive spindle adapter with the 10731 industrial keyed chuck for seamless alignment and minimal vibration.
• Precision Slot Drive Lock: Direct-mount engineering interfaces cleanly with HMD series magnetic drill spindles to transfer maximum rotational torque without slipping.
• Hardened Alloy Tool Steel: Resists severe torsional shear, surface wear, and runout distortion under sustained heavy-feed drilling pressures.
• Positive Manual Keyed Clamping: Heavy-duty chuck jaws clamp straight-shank bits with uniform pressure to eliminate spinning during sudden break-through torque spikes.
• Standard 3/8-16 UNC Threading: Provides rigid, concentric mounting between the spindle adapter shaft and the drill chuck body.

What's Included

• (1) Hougen 08186 Slot Drive Spindle Adapter
• (1) Hougen 10731 Industrial Keyed Drill Chuck
• (1) Heavy-Duty Steel Chuck Key
• (1) Factory Instruction & Installation Sheet

Technical Specifications

Pro-Tip: When using standard twist drill bits in a magnetic drill press, tighten the chuck key in all three gear pin holes sequentially; this ensures concentric jaw alignment and eliminates bit runout under heavy downward feed pressure.