Lathe - Weight Limits for the Workpiece


This document tells you the workpiece weight limits. This refers to Haas lathes.

The weights do not include the weight of the workholding.

These weights are estimates. They do not make a safe setup.

The chuck and jaw have a weight capacity. The weight of the workpiece must be less than the capacity. The operator must make sure that the setup and operation of the machine is safe.


Put 1/3 or more of the workpiece into the chuck if you have this condition: The workpiece has less than a 3-to-1 length-to-diameter ratio.

Support the workpiece with a tailstock or steadyrest if you have this condition: The workpiece has more than a 3-to-1 length-to-diameter ratio.

Turning speed and holding force are related. As the speed increases, the holding force decreases.

Y Axis, Live Tooling, and other options have no effect on weight capacity.

Lathe Work Piece Weight Limits

Machine Model Maximum Weight On ChuckMaximum Weight With Tailstock
Office Lathe OL-115 lb (6.8 kg)N/A
Toolroom LatheTL-170 lb (32 kg)140 lb (64 kg)
TL-270 lb (32 kg)140 lb (64 kg)
TL-3250 lb (113 kg) 500 lb (227 kg)
TL -3W250 lb (113 kg) 500 lb (227 kg)
TL-3B1000 lb (453 kg)2000 lb ( 907 kg)
Standard LatheST-1070 lb (32 kg)140 lb ( 64 kg)
ST-10Y70 lb (32 kg)140 lb ( 64 kg)
ST-20150 lb (68 kg)300 lb (136 kg)
ST-20SS100 lb (45 kg)200 lb (91 kg)
ST-25200 lb (91 kg)400 lb (181 kg)
ST-30250 lb (113 kg)500 lb (227 kg)
ST-30SS125 lb (57 kg)250 lb (113 kg)
ST-35500 lb (227 kg)1000 lb (454 kg)
ST-40 / ST-40L500 lb (227 kg)2000 lb (907 kg)
ST-45 / ST-45L1000 lb (454 kg)3000 lb (1361 kg)
Dual Spindle LatheDS-30 (Main Spindle)100 lb (45 kg)N/A
DS-30 (Secondary Spindle)100 lb (45 kg)N/A
DS-30SS (Main Spindle)75 lb (34 kg)N/A
DS-30SS (Secondary Spindle)75 lb (34 kg)N/A

Machine Model Maximum Weight per Chuck Maximum Weight between Centers or between Chucks
Front and Rear Spindle Nose Lathe ST-50 / ST-55 2000 lb (907 kg) 3000 lb (1361 kg)
TL-3B 1000 lb (453 kg) 2000 lb (907 kg)

Be aware: Many service and repair procedures should be done only by authorized personnel. The service technicians at your Haas Factory Outlet (HFO) have the training, experience, and are certified to do these tasks safely and correctly. You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes.

Danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not completely understand. Contact your Haas Factory Outlet (HFO) and schedule a service technician visit if you have any doubts about doing a procedure.