AMMCO 7700 Drum and Disc Brake lathe - Manual (Page 6)

2 • AMMCO Drum & Disc Brake Lathes
Operating Specifications
3000 4000 4100 7500
Overall lathe height 17.25” (438 mm) all models
Lathe shipping weight 325 lbs (147 kg) 385 lbs (175 kg) 410 lbs (186 kg) 367 lbs (167 kg)
Floor space requirements - width 48” (1219.20 mm) all models
Floor space requirements - deep 34.5” (901.70 mm) all models
Spindle to floor
(mounted on optional bench)
39.375” (1000 mm) all models
Electrical requirements Standard: 115 VAC, 60 Hz, single-phase, fused at 15 amps (all models)
(unless otherwise specified) Optional: 230 VAC, 60 Hz, single-phase, fused at 6.3 amps (all models)
Spindle motor 1 HP, 60 Hz, 115/230 VAC (all models)
Spindle travel 6.875” (175 mm) 6.875” (175 mm) 9.875” (251 mm) n/a
Spindle speed
Inner Groove 100 RPM 100 RPM 60 RPM 100 RPM
Middle Groove _ _ 80 RPM _
Outer Groove 200 RPM 200 RPM 115 RPM 200 RPM
Spindle feed speed Infinitely variable
Minimum 0.002 inch per revolution (0.05 mm/rev) except 7500 n/a
Maximum 0.020 inch per revolution (0.50 mm/rev) except 7500 n/a
Cross feed speed
Fine Manual 0.002 0.002 0.002
Course Manual 0.010 0.010 0.010
Handwheel graduations 0.002 (0.050 mm) all models
Maximum brake rotor diameter* 14.5” (368.3 mm) all models
Maximum brake rotor thickness 1.875” (47.63 mm) 4” (102 mm) 1.875” (47.63 mm)
Brake drum diameter
Minimum 6” (152 mm) (except 7500) n/a
Maximum 28” (711 mm) (except 7500) n/a
Maximum drum depth 6.875” (175 mm) 6.875” (175 mm) 9.875” (251 mm) 9.875” (251 mm) n/a
Maximum load
1” Arbor 100 lbs. (45.36 kg) all models
1.875” Arbor 200 lbs. (90.72 kg) all models
* The no. 906936 Cross Feed Extension – for use with the 4000, 4100 and 7500 lathes only
– increases the maximum rotor diameter to 19” (483 mm).