Simmons SWL-400 CNC Wheel Lathe

The Simmons SWL-400 CNC Wheel Lathe is a rugged and reliable above-floor wheel lathe for turning solid wheel or tired wheel treads of worn wheel sets of railway passenger and freight cars, diesel railcars, and locomotives.

The lathe removes flat spots, shelling, and restores the wheel profile to pre-programmed specifications. Feeding-in, centering, chucking, wheel contour turning, and feeding-out are automatically controlled by the CNC controller. In addition, all operations can be initiated by pushbutton control from the operator’s control pendant. An automatic probe system determines the wheel diameter, flange thickness, wheel width, and tread metal remaining with direct data input to the CNC control system.

Simmons CNC Wheel Lathe

Clamping and holding of the wheel set is accomplished hydraulically, while the profiling tools are controlled by ball screw drives and electric servo-motors. The lathe is a rear loading and unloading, in/out, dual drive design leaving the center bed open for options such as wheel set elevators and chip collection systems. The headstocks, tool carriages, and bed are heavily reinforced steel fabrications stress relieved and normalized after welding. The headstock and tailstock face plates are independently driven by belt drives and 75 HP gear motors to maintain the constant high torque required. The wheels are clamped between spring loaded driver dogs mounted to the face plates to ensure no slippage occurs during the machining process. The tailstock is guided by precision box ways.

Machine Specifications

Download the Simmons SWL-400 CNC Wheel Lathe product data sheet — for the full machine specification, please contact the Machine Sales team.


24-28 wheel sets per 8-hour shift

Wheel Diameter Parity

+/- 0.15 mm

Deviation From Nominal Profile

+/- 0.2 mm

Radial Runout At Tapeline

+/- 0.2 mm

Maximum Depth of Cut

13 mm

Feed Rate

0–2 mm/rev

Spindle Speed

0–25 RPM variable

Electrical Power

160 kW

Max. Compressed Air (Intermittent)

30 scfm @ 80–100 psi

Hydraulic Reservoir

378 liters

Maximum Wheel Diameter

1143 mm

Minimum Wheel Diameter

660 mm

Maximum Axle Length

2438 mm

Minimum Axle Length

1651 mm

Maximum Weight

3300 kg

We're here to help

The NSH USA Customer Service Center (CSC) is here to support you and your machine. As the original equipment manufacturer (OEM), we are ideally suited to keep your machine productive and operating safely.

We offer:

OEM Spare & Replacement Parts
New or Upgrade Services
Service & Inspections

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