WP Welding Chucks
Lightweight Large Through-Bore Self-Centering Welding Chucks
WP Welding Chucks are large through-bore self-centering chucks designed for efficient workpiece clamping in welding and cutting applications.
The WP Series features a compact and lightweight structure with convenient manual operation. A handle directly drives the scroll mechanism to move the jaws, allowing fast clamping and release of the workpiece.
The reduced chuck thickness helps lower the workpiece center distance and improve the effective load capability of the welding equipment. With high accuracy, flexible operation and a wide range of available sizes, WP Welding Chucks are suitable for welding positioners and a variety of welding and cutting applications.
Available Models: WP200 – WP900
Chuck Diameter: Ø200 – Ø900 mm
Load Capacity: Up to 1000 kg
Custom Jaws: Extended, 4-jaw, 6-jaw and irregular multi-jaw configurations available
WP Series Manual Welding Chuck Features
Large Through-Bore Design
The open-center design provides clearance for pipes and other cylindrical workpieces and makes the WP Series suitable for welding positioners and rotary welding applications.
Large Through-Bore Design
The open-center design provides clearance for pipes and other cylindrical workpieces and makes the WP Series suitable for welding positioners and rotary welding applications.
Quick Manual Clamping
The operating handle directly drives the scroll mechanism, reducing workpiece clamping and release time and helping improve productivity in repetitive welding and cutting operations.
Compact & Lightweight Construction
The WP Series is designed with a relatively thin chuck body. The catalogue states that overall chuck thickness is reduced by approximately 50%, helping lower the workpiece center distance and improve the effective load capability of the welding equipment.
Wide Range of Sizes
Seven standard models are available, from the compact WP200 to the larger WP900.
Custom Jaw Configurations
Extended jaws can be supplied to increase the clamping range. Custom 4-jaw, 6-jaw and irregular multi-jaw chucks are also available.
WP Welding Chuck Specifications
| Model | Allowable Clamping Force | Load Capacity | Standard Jaw Range | Reversed Jaw Range |
| WP200 | 200 kg | 30 kg | Ø20–130 mm | Ø110–210 mm |
| WP300 | 250 kg | 120 kg | Ø20–190 mm | Ø170–300 mm |
| WP400 | 350 kg | 240 kg | Ø120–250 mm | Ø250–400 mm |
| WP500 | 600 kg | 600 kg | Ø200–340 mm | Ø360–500 mm |
| WP600 | 1200 kg | 1000 kg | Ø60–410 mm | Ø400–700 mm |
| WP750 | 1400 kg | 1000 kg | Ø250–580 mm | Ø550–850 mm |
| WP900 | 1500 kg | 1000 kg | Ø400–700 mm | Ø550–950 mm |
These performance values are based on the supplied WP Series catalogue. Extended jaws can be customized to increase the available clamping range.
Important: Allowable clamping force and load capacity are different specifications. Workpiece weight, geometry, clamping position and operating orientation should all be considered when selecting a chuck.
Mounting Dimensions
| Model | D1 | D2 (H7) | D3 | D4 | H | H1 | H2 | L | Z-d1 | Z-d |
| WP200 | Ø80 | Ø100 | Ø120 | Ø200 | 67.5 | 39 | 21 | 200 | 6-M6 | 3-M8×35 |
| WP300 | Ø100 | Ø120 | Ø150 | Ø300 | 67.5 | 39 | 21 | 240 | 6-M6 | 3-M8×35 |
| WP400 | Ø170 | Ø220 | Ø250 | Ø400 | 95 | 45 | 25 | 300 | 6-M6 | 3-M10×40 |
| WP500 | Ø240 | Ø280 | Ø320 | Ø500 | 110 | 60 | 25 | 350 | 6-M6 | 3-M12×55 |
| WP600 | Ø360 | Ø395 | Ø425 | Ø600 | 170 | 105 | 40 | 425 | 6-M12 | 6-M12×110 |
| WP750 | Ø490 | Ø530 | Ø570 | Ø750 | 170 | 105 | 40 | 500 | 6-M12 | 6-M12×110 |
| WP900 | Ø580 | Ø640 | Ø680 | Ø900 | 170 | 105 | 40 | 600 | 6-M12 | 6-M16×110 |
Dimensions in mm.
The dimensions are provided as a selection reference. Actual dimensions should be confirmed against the order drawing before installation or manufacture.
Standard, Reversed & Custom Jaws
- Standard Jaws
The standard jaw position is suitable for the normal clamping range of each WP model.
Across the WP Series, standard jaw ranges cover workpiece diameters from Ø20 mm up to Ø700 mm, depending on model. - Reversed Jaws
Reversing the jaws increases the available clamping diameter. - For example:
- WP600
Standard jaws: Ø60–410 mm
Reversed jaws: Ø400–700 mm - WP900
Standard jaws: Ø400–700 mm
Reversed jaws: Ø550–950 mm - Extended Jaws
Custom extended jaws can be supplied when a larger clamping range is required.
The catalogue specifically notes that when the workpiece clamping position extends beyond the chuck body, the available clamping/load capability will decrease.
Custom Jaw Configurations
WP Welding Chucks are not limited to a standard three-jaw configuration.
Depending on the workpiece and application, available custom options include:
- 3-Jaw Self-Centering Chuck
- 4-Jaw Chuck
- 6-Jaw Chuck
- Irregular Multi-Jaw Chuck
- Extended Jaw Configuration
The WP catalogue explicitly states that extended jaws, 4-jaw, 6-jaw and irregular multi-jaw chucks can be customized.
Typical Applications
- Welding Positioners
WP Welding Chucks can be mounted on compatible welding positioners to hold and center the workpiece during rotation. - Pipe Welding
The large through-bore design is suitable for pipe and cylindrical workpiece clamping. - Welding & Cutting Equipment
Quick manual clamping and release make the WP Series suitable for repetitive welding and cutting operations. - Flange & Circular Component Fabrication
The self-centering chuck design can be used to position suitable circular components during fabrication. - Rotary Welding Systems
WP chucks can form part of a rotary welding setup together with a compatible positioner or rotating system.
How to Select a WPS Welding Chuck
1. Workpiece Diameter
Determine the minimum and maximum diameter that needs to be clamped.
2. Workpiece Weight
Check the rated load capacity of the selected model.
For example, WP200 is rated for 30 kg, while WP600, WP750 and WP900 are specified at up to 1000 kg load capacity.
3. Jaw Position
Determine whether standard, reversed or extended jaws are required.
4. Workpiece Geometry
Consider the shape, length and actual clamping position of the workpiece.
5. Welding Positioner
Check both the chuck and positioner capacities when the chuck is mounted on a welding positioner.
6. Mounting Interface
Compare D1, D2, D3 and the mounting-hole pattern with the equipment mounting table.
WPS Series Selection Guide
| Workpiece / Required Range | Model to Consider |
| Up to Ø210 mm | WP200 |
| Up to Ø300 mm | WP300 |
| Up to Ø400 mm | WP400 |
| Up to Ø500 mm | WP500 |
| Up to Ø700 mm | WP600 |
| Up to Ø850 mm | WP750 |
| Up to Ø950 mm | WP900 |
This table is intended for preliminary diameter selection only. Final model selection should consider the workpiece weight, standard or reversed jaw range, clamping force, mounting dimensions and actual operating conditions.
WP vs. WPS Welding Chucks
| Feature | WP Series | WPS Series |
| Main Positioning | Lightweight welding chuck | Higher-force welding chuck |
| Through-Bore | Large | Large |
| Self-Centering | Yes | Yes |
| Manual Operation | Yes | Yes |
| WP Size Range | WP200–WP900 | WPS600–WPS1250 |
| Max. Specified Clamping Range | Ø950 mm | Ø1250 mm |
| Max. Load Capacity | 1000 kg* | Not specified in catalogue |
| Max. Clamping Force | Listed in kg in catalogue | 100 kN |
| Mechanism Highlight | Handle directly drives scroll | Bevel gear + scroll |
| Typical Focus | General welding positioner applications | Larger/high-clamping-force applications |
Request a Quote
Looking for a WP Welding Chuck?
Send us your workpiece and equipment information for model selection and quotation.
WP Model: __________
Workpiece Type: __________
Minimum Diameter: __________ mm
Maximum Diameter: __________ mm
Workpiece Length: __________ mm
Workpiece Weight: __________ kg
Jaw Configuration: 3 / 4 / 6 / Custom
Welding Positioner Model: __________
Mounting Dimensions: __________
Quantity: __________
For replacement applications, please send us photos, drawings or dimensions of your existing chuck and welding positioner.
Frequently Asked Questions
A WP Welding Chuck is a manual large through-bore self-centering chuck designed for workpiece clamping in welding and cutting applications. The handle directly drives the scroll mechanism for quick clamping and release.
The catalogue includes WP200, WP300, WP400, WP500, WP600, WP750 and WP900.
WP600, WP750 and WP900 are specified with load capacities up to 1000 kg. Smaller models have lower rated capacities.
Yes. In addition to the standard configuration, the catalogue states that extended jaws, 4-jaw, 6-jaw and irregular multi-jaw configurations can be customized.
Yes. The catalogue specifically shows WP Series chucks installed with welding positioners. The mounting dimensions and equipment capacity should be checked for the actual application.
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