CNC Lathe with 400 mm Guideway for Shaft Turning

Short Answer

A CNC lathe with a 400 mm guideway is designed for small-to-medium shaft turning where machine rigidity, workpiece support, and CNC repeatability are important. Compared with a narrower-bed machine, the 400 mm guideway provides a wider structural foundation for the carriage and cutting system, making it suitable for shafts, sleeves, rollers, and other cylindrical components. Depending on the model, Xinheng's 400 mm guideway CNC lathe series offers swing over bed from Φ400 to Φ800 mm, workpiece lengths up to 1500 mm, spindle bores up to Φ105 mm, and tailstock support. For shaft machining, buyers should consider not only guideway width, but also shaft diameter, length, weight, spindle bore, turning length, chuck size, tailstock, and steady-rest requirements.

What Is a 400 mm Guideway CNC Lathe?

The 400 mm guideway refers to the span or width of the machine bed guideway. It is different from swing over bed, turning diameter, or spindle bore.

Guideway width matters because the bed and guideways support the carriage and cutting forces generated during machining.

For shaft turning, a wider and suitably rigid machine structure is useful when the workpiece becomes longer, larger in diameter, or requires greater material removal.

However:

400 mm guideway ≠ 400 mm turning diameter.

For example, different machines using a 400 mm guideway can have very different swing and spindle specifications.

Applications

A 400 mm guideway CNC lathe can be used for general industrial shaft and cylindrical-part production, including:

This makes the machine suitable for machinery manufacturing, equipment maintenance, automotive components, pumps, motors, transmission parts, and general metalworking workshops.

Main Functions for Shaft Turning

A shaft rarely requires only one straight turning operation. A CNC lathe can combine multiple features in one machining program.

Typical operations include:

1. Facing – establishes the shaft end surface.
2. OD turning – machines the main shaft diameter.
3. Step turning – produces shoulders and different diameters.
4. Grooving – machines retaining-ring and relief grooves.
5. Taper turning – produces tapered shaft sections.
6. Threading – machines external or internal threads.
7. Boring and      drilling – produces axial      internal features.

CNC control is particularly useful when multiple shafts with the same geometry must be produced repeatedly.

Key Parameters: 400 mm Guideway Series

Xinheng's 400 mm guideway range provides several capacities rather than one fixed machine size.

*Exact specifications depend on the selected CKQ model and configuration.

One important point for buyers is the difference between maximum workpiece length and maximum turning length. A machine may physically accommodate a certain shaft length, but the actual length that can be continuously turned can be shorter.

Configuration for Long Shaft Machining

For shaft machining, the machine itself is only part of the setup.

A tailstock supports the free end of the workpiece and is especially important when the shaft extends significantly beyond the chuck.

For longer or more slender shafts, a steady rest or follow rest can provide additional support and help control deflection and vibration. Xinheng lists both steady rests and follow rests among the available options for this CNC lathe series.

The series can also be configured with different chuck types, hydraulic chuck, hydraulic tailstock, 6/8/12-position turrets, chip conveyor, and CNC systems including GSK, FANUC, and Siemens options.

How to ｓｅｌｅｃｔ the Right Model

Do not ｓｅｌｅｃｔ a shaft lathe based only on guideway width.

Start with the actual workpiece and confirm:

Shaft diameter → Shaft length → Shaft weight → Machining allowance → Required accuracy → Clamping method → Support method

For example, a short Φ100 mm shaft and a long Φ100 mm shaft may require very different support arrangements even though their diameters are identical.

For long shafts, pay particular attention to center distance, turning length, tailstock, steady rest, and workpiece rigidity.

FAQ

Is a 400 mm guideway suitable for long shafts?

Yes, within the capacity of the selected model. Xinheng's 400 mm guideway series provides workpiece-length options up to 1500 mm. Longer or slender workpieces may require tailstock and steady/follow-rest support.

Does 400 mm guideway mean Φ400 mm maximum workpiece diameter?

No. Guideway width describes the bed structure. The 400 mm guideway series includes models with swing over bed ranging from Φ400 to Φ800 mm.

Which parameters are most important for shaft turning?

Check swing over bed, swing over carriage, maximum workpiece length, maximum turning length, spindle bore, chuck, spindle speed, tailstock, and support requirements.

What information should I provide before ordering?

Send the shaft drawing, maximum diameter, total length, material, weight, machining allowance, tolerance, batch quantity, and required operations. These details allow the chuck, CNC system, turret, tailstock, and support configuration to be matched to the application. Xinheng also recommends selecting machines based on the actual workpiece drawing and machining requirements.

For product details, see Anyang Xinheng 260/312/400 mm Guideway CNC Lathe.