Long oil pipes, casing and tubing
Feed the pipe through the spindle and grip close to the end. Use this arrangement for pipe-end threading, facing and chamfering.
Pipe-end chuck for oil pipe threading, casing, tubing and front-mounted pneumatic workholding.
Oil Pipe Thread Chuck
The K53 front-mounted pneumatic chuck holds long tubular workpieces for pipe-end threading. Its air cylinder is built into the chuck body. The pipe passes through the central bore, and three jaws grip its outside diameter. Long-pipe lathes can use one chuck at the front of the spindle and another at the rear.
What Is an Oil Pipe Thread Chuck?
An oil pipe thread chuck holds a tubular workpiece on a pipe-threading lathe. The jaws grip the outside of the pipe. The pipe end stays clear for threading, facing and chamfering. The K53 uses a front-mounted pneumatic design.
This design is also called a pneumatic front-end chuck or an air-operated self-contained chuck. The cylinder sits inside the chuck body and drives the clamping movement there. The central bore leaves room for the pipe to pass through the spindle.
Workshop photos: See the finished K53 chucks and customer batch
Customer Video: Pipe-End Machining
This customer video shows the K53 installed on a lathe. You can see the three-jaw chuck, the tubular workpiece and the cutting operation at the pipe end. Use the video to understand the setup, then check the drawings and model tables below.
A Newly Produced Customer Batch
These workshop photos show finished chucks from the same series. The central bore, three jaws and chuck body are easy to see. Open the production blog for more photos of the batch.
Workshop photos: See the finished K53 chucks and customer batch
Technical Data and Dimensions
Use the drawing and parameter tables to check chuck size, pipe clamping range, mounting dimensions, pneumatic pressure, clamping force, speed, inertia and matching machine conditions.
Use this drawing to confirm installation dimensions and technical parameters.
| Model | A | A1 | B | C (H6) | D | E | F | M |
|---|---|---|---|---|---|---|---|---|
| 350 | 380 | 315 | 192 | 235 | 275 | 7 | 115 | 6-M12 |
| 400S | 467 | 400 | 194 | 310 | 374 | 8 | 152 | 9-M12 |
| 400 | 223 | 150 | ||||||
| 460 | 238 | 181 | ||||||
| 500 | 510 | 313(338) | 325(300) | 360(330) | 10.5 | 205 | 12-M16 | |
| 570 | 570 | 500 | 280 | 415 | 474 | 8 | 12-M12 | |
| 570A | 230 | |||||||
| 600 | 605 | 535 | 450 | 508 | 280 | |||
| 630 | 685 | 610 | 305.5 | 510 | 580 | 325 | ||
| 730 | 730 | 658 | 301.5 | 560 | 630 | 10.5 | 355 | 12-M16 |
| 850 | 850 | 755 | 352 | 700 | 745 | 8 | 375 | |
| 900 | 900 | 440 | ||||||
| 1000 | 1000 | 850 | 330 | 815 | 10 | 560 | ||
| 1150 | 1150 | 1060 | 352 | 800 | 1000 | 660 |
Use this drawing to confirm installation dimensions and technical parameters.
| Model | Single Jaw Stroke (mm) | Clamping Force (Air Pressure 0.5 MPa) kN (kgf) | Max. Speed (r/min) | Moment of Inertia (kg·m2) | Weight (kg) | Pressure MPa (kgf/cm2) |
|---|---|---|---|---|---|---|
| 350 | 13+7 | 62(6326) | 3000 | 1.62 | 110 | 0.2-1(2-10) |
| 400S | 7 | 130(13265) | 1700 | 5.6 | 154 | |
| 400 | 13+7 | 1300 | 6.5 | 200 | ||
| 460 | 110(11220) | 9.8 | 190 | |||
| 500 | 17+7 | 140(14286) | 15.5 | 298 | ||
| 570 | 17+8.5 | 160(16326) | 16.4 | 340 | ||
| 570A | 140(14286) | 16.1 | 325 | |||
| 600 | 160(16326) | 1100 | 19 | 360 | ||
| 630 | 180(18367) | 900 | 28 | 520 | ||
| 730 | 15+10 | 190(19388) | 800 | 44.2 | 583 | |
| 850 | 13.4+12 | 200(20408) | 750 | 71.2 | 970 | 0.3-1(3-10) |
| 900 | 190(19388) | 700 | 105 | 980 | ||
| 1000 | 15+10.4 | 170(17347) | 450 | 150 | 960 | |
| 1150 | 230(23470) | 400 | 194 | 1890 |
How the Front-Mounted Pneumatic Chuck Works
- Supply air
Compressed air enters the built-in cylinder and moves the piston.
- Move the jaws
The internal drive transfers the piston movement to the three jaws. They move radially towards the pipe.
- Grip the pipe
The jaws contact and grip the outside diameter. The exposed pipe end leaves room for the cutting tool.
- Release the workpiece
After machining, stop the spindle. Switch the air circuit to retract the jaws, then remove or reposition the pipe.
Air operates the clamping mechanism. The machine spindle rotates the chuck and workpiece during cutting. These are separate functions.
Why Use a Chuck at Both Ends of the Spindle?
Rear chuckSpindle passageFront chuckPipe-end tool
The long pipe passes through the spindle. The front chuck grips near the cutting end. The rear chuck grips the pipe behind the spindle. Two gripping points help control the pipe axis and reduce movement compared with holding the pipe only at the front.
Align the centres of both chucks during installation. Set the gripping positions and the exposed pipe length. Use rollers or a support stand for the pipe extending outside the machine.
Rapid Approach, Then Slower Clamping
The jaws first travel quickly across the open gap. This reduces the time spent approaching the pipe. As the jaws get close to the workpiece, they slow down and complete the grip.
The two stages are rapid approach and slower clamping. They describe jaw movement, not spindle speed. When changing pipe sizes, check the outside diameter, jaw position and available single-jaw stroke together.
The model table below lists the stroke for each size. Size 350 is listed as 13+7 mm; 400S is listed as 7 mm. Use the row for the chosen model rather than assuming every model has the same stroke.
Workpieces and Threading Jobs
Long oilfield couplings
Grip the coupling outside diameter and leave the bore accessible. Set the gripping length so the internal threading tool has room to enter and withdraw.
Drill rods and other long tubular parts
Hold drill rods and long tubes for threading at their ends or connection areas. Choose the chuck around pipe diameter, wall thickness and length. Then arrange the front and rear grips and external supports.
How Does It Differ from a General Pneumatic Chuck?
| Item | K53 front-mounted pipe chuck | General pneumatic chuck selection |
|---|---|---|
| Workpiece | Long oil pipes, couplings, drill rods and other tubes. | Usually selected around the size and gripping method of a general turning job. |
| Cylinder | Built into the chuck body. | Internal and external cylinder designs exist; check the actual product. |
| Machine layout | Can use front and rear spindle chucks for long pipe. | A single chuck is common; long workpieces need additional support. |
| Pipe passage | Large through-bore and spindle passage are central to selection. | Bore size depends on the product. Pneumatic actuation alone does not mean a large bore. |
| Jaw movement | Long travel, rapid approach and slower clamping; check the model row. | Check stroke and movement stages. They cannot be inferred from the word pneumatic. |
Oil Pipe Thread Chuck Selection Notes
Three Checks Before Choosing a Model
Workpiece
Send the outside diameter, wall thickness, length and thread drawing. Mark the gripping position and exposed pipe-end length.
Machine
Send the spindle bore, spindle nose or flange dimensions and space at both ends. Include photos of both mounting positions for a dual-chuck setup.
Movement and cutting
Give the air pressure, required jaw travel, machining speed and cutting operations. State whether rapid approach and slower clamping are needed.
- Confirm pipe outside diameter, wall thickness and thread type.
- Check whether the machine layout requires a front-mounted chuck structure.
- Review pneumatic pressure, clamping force and pipe-end holding length.
- Confirm speed, inertia, mounting dimensions and machine compatibility.
- Select this product for pipe-end thread workholding and verify the pipe range, wall thickness, thread form, air pressure, jaw travel and machine interface.
Related Application-Specific Power Chuck Pages
FAQ
What is an oil pipe thread chuck used for?
It is used for clamping oil pipes, casing, tubing and other pipe ends during pipe threading, thread machining or related pipe-end operations.
How is it different from a standard hydraulic chuck?
The K53 uses compressed air and a cylinder built into the chuck body. A conventional hydraulic chuck uses hydraulic actuation. For long pipes, the K53 can be fitted at the front and rear of the spindle.
What pipe or tube information should be confirmed?
Confirm the pipe outside diameter, wall thickness, length, material and whether the workpiece is oil pipe, casing, tubing or another tubular part.
What machine or spindle interface should be checked?
Check the machine model, spindle through-hole, spindle nose or mounting interface, available front-side space and the actuation layout before selection.
What clamping range or pipe-end condition should be provided?
Provide the required clamping range, the pipe-end condition, the clamping position and whether the threading process changes the exposed pipe-end length.
Can it be used for pipe-end threading production?
Yes. It is commonly used for pipe-end threading production where the workpiece must pass through the spindle and be held securely at the pipe end.
What should be checked before installation?
Check the mounting dimensions, spindle through-hole, pneumatic pressure, pipe support condition, target speed and available installation space before installation.
What information is needed for quotation?
Provide the pipe outside diameter, wall thickness, length, thread type, machine model, spindle through-hole, clamping position, pneumatic pressure and any photos or drawings of the current setup.
Why use chucks at the front and rear of the spindle?
The front chuck grips near the cutting end. The rear chuck grips behind the spindle. These two points help control the long pipe axis. The pipe outside the machine also needs rollers or a support stand.
Does the two-stage movement change spindle speed?
No. The jaws approach quickly, then slow down to clamp. The lathe controls spindle speed.
What does the built-in cylinder do?
Compressed air moves the piston inside the chuck body. The internal drive transfers this movement to the jaws. The clamping movement takes place inside the chuck.