AMMCO® Brake Lathe 4000B The AMMCO® 4000B Combination Disc and Drum Brake Lathe has been professionals’ first choice for more than 50 years. The AMMCO® 4000SP Combination Disc and Drum Brake Lathe offers such legendary reliability and proven performance with one-pass finishing that we’re surprised it even requires an operator. 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 the AMMCO® 4000B, but pack it with an additional spindle travel of 9.875″ (250.83mm), and you’ll get the 4100B. The AMMCO® 4000E Combination Disc and Drum Brake Lathe is the ultimate in finish control, right at your fingertips, from the leader in brake service.