Brake Lathe 4100B Combination Disc and Drum – Ammco

The 4100B expands on the 4000B, initially introduced four decades ago. Since then, it has been the primary choice for brake technicians who manage a large quantity of medium-duty trucks. And for good reason. It’s simple. It’s fast. It’s very precise. The speed control allows technicians to fit in more customers each day without loss of quality finish. And the added 9.875″ of drum capacity doesn’t hurt.


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Brake Lathe 4100B Combination Disc and Drum – AMMCO®

Model #
– 4100B

Part #
– 904100B

Medium-Duty Lathe for Brake Drums and Rotors, Less Adapters, 110V, 60Hz (Must be Purchased with a Bench Lathe Adapter Kit)

Product Details:
The AMMCO® 4100B Combination Disc and Drum Brake Lathe is the top pick for wider brake assemblies. Take the same basic design and features of theAMMCO® 4000B, but pack it with an additional spindle travel of 9.875″ (250.83mm), and you’ll get the 4100B.

Simplicity, Speed, and Precision

Key Features
– Ideal for medium-duty truck service.
– Extended spindle increases drum capacity to 9.875″.Three adjustable spindle speeds (if desired)
allow for fast turning of small pieces and high-quality turning of larger ones.
– Two feed rates allow for quick rough-cut and finer finish-cut settings.
– Speed control gives operators a quality finish in less time.
– Adjustable-bar twin cutter provides the greatest range of settings from small cars to 5-ton

Part Number
– 904100B

Shipping Weight
– 422 lbs.

– High

– Rotor & Drum

Tool Bits (shipped with)
– Negative Rage

– Car & Medium Truck

Standard Max Arbor Capacity
– 100 lbs.

Spindle Speed
– 60,80,115 RPM

Spindle Bearings
– Bronze Sleeve

Rotor Feed Rate
– .002″/.010″/REV

– Yes

– 1 HP

Max Rotor Thickness
– 4″

Max Rotor Face Width
– 3-3/4″

Max Rotor Diameter
– 19″

Max Drum Diameter
– No

Max Drum Depth
– 9.875″

Double Taper Arbor
– Yes

Flywheel Service Capable
– Yes

– Yes

Drum Feed Rate
– .002″ to .020″/REV

Heavy Duty Max Arbor Capacity
– 200 lbs


Additional information

Weight 6752 oz


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