Larry on Lake Superior
Hot Rolled
- Joined
- Jan 11, 2005
- Location
- Duluth, MN
Just bought a 14-1/2 inch South Bend made in 1965. This lathe came from a trade school and seems to be in good shape. All original-3J-4J-telescoping taper attachment-L-00 spindle nose-2 HP 3 phase motor-Hand Wheel 5C collet setup. Purchased lathe from the course instructor. The school now has mostly Haas equipment.
Vintage Machinery has a full line 1966 South Bend catalog. The catalog shows 3 HP motor as an option. Catalog also shows optional maximum speed of 1200 RPM instead of 845 stock. I'd like to run insert tooling and thus the interest in more power and speed. According to the catalog the lathe with motor is right at a ton.
Stock drive line configuration has 4ea. narrow V belts driving the shaft that carries the lower cone pulley. The motor pulley is quite small. If I go to a 3 horse I could change the two pulleys and achieve the desired spindle speed. I could also go to 2 groove pulleys and wider V belts.
Conversely, I can use the VFD to achieve the same speed by dialing in about 85 HZ. Is one method appreciably better than the other?
Is it easy to wire in an emergency stop button?
Thanks,
Larry
Vintage Machinery has a full line 1966 South Bend catalog. The catalog shows 3 HP motor as an option. Catalog also shows optional maximum speed of 1200 RPM instead of 845 stock. I'd like to run insert tooling and thus the interest in more power and speed. According to the catalog the lathe with motor is right at a ton.
Stock drive line configuration has 4ea. narrow V belts driving the shaft that carries the lower cone pulley. The motor pulley is quite small. If I go to a 3 horse I could change the two pulleys and achieve the desired spindle speed. I could also go to 2 groove pulleys and wider V belts.
Conversely, I can use the VFD to achieve the same speed by dialing in about 85 HZ. Is one method appreciably better than the other?
Is it easy to wire in an emergency stop button?
Thanks,
Larry