CNC punch and pin grinding from 1 mm up to 150 mm, internal and external.
The WK22 is a CNC punch grinder for internal and external grinding of punch pins and small precision components. It clamps from 1 mm to 150 mm diameter, swivels the workhead plus or minus 45 degrees and carries an internal spindle running between 10000 and 20000 rpm on ER11 collets. External wheel speed is variable from 0 to 8000 rpm.
Who it is for: Stamping and progressive die shops, press tool makers, connector and terminal manufacturers, and maintenance teams that keep presses running on their own tooling.
Pilot pins, punches, die buttons and small bushes all go on the same machine, internal or external.
Small bores need surface speed, not just rotation. 10000 to 20000 rpm on ER11 collets delivers it.
Angled lands, chamfers and tapered forms are ground by setting the head rather than building a fixture.
Long blanks feed through the spindle instead of cantilevering out of the chuck, which keeps deflection out of the ground diameter.
A punch grinder in the tool room turns a week of outside service into a same day job.
Once the machine is on site, standard punch blanks become finished punches in your own tool room.
A swivelling workhead grinds the land instead of leaving it to a file and a magnifier.
Cast iron base and column with ground slideways, CNC controlled axes and a high frequency internal spindle. Wheel type is specified for the punch material, including diamond wheels for carbide.
Figures below are taken from the machine data sheet. Anything not documented is marked as to be confirmed rather than estimated.
| Clamping working diameter (ID and OD) | 1 to 150 mm |
|---|---|
| Horizontal travel of worktable | 150 mm |
| Longitudinal stroke of worktable | 150 mm |
| Work head rotation speed | 0 to 1000 rpm |
| Working head rotation angle | +/- 45 degrees |
| T slot of worktable | 14 mm x 1 |
| Internal spindle speed | 10000 to 20000 rpm |
| Internal spindle collets | ER11 |
| Grinding wheel speed (external) | 0 to 8000 rpm |
| External spindle motor speed | 8000 to 10000 rpm |
| Grinding wheel size | 125 to 150 mm |
| Spindle through hole | 25 mm |
| Machine overall dimensions (L x W x H) | 1200 x 500 x 1500 mm |
| Machine weight | 1280 kg |
Six stages, each of them completed in our own hall in Shenzhen before the machine is crated.
Against the universal WK1420x500, the WK22 trades workpiece size for control and spindle speed.
| Model | Key Specification | Best Suited To |
|---|---|---|
| WK22 | 1 to 150 mm clamping, CNC, 20000 rpm internal spindle, 1280 kg | Punch pins, small bores and precision tooling |
| WK1420x500 | 200 mm OD, 500 mm length, 14000 rpm internal spindle | Longer shafts and larger bushes |
| FX-12S | 0.5 to 40 mm through feed centerless | High volume repeat diameters, no clamping |
1 mm diameter is the bottom of the clamping range, and the same range covers internal and external work up to 150 mm.
Your choice of FANUC, SIEMENS, SYNTEC or GSK. We normally recommend matching whatever your maintenance team already supports.
With a diamond wheel and a rigid setup, yes. Send the punch material and geometry and we will confirm the wheel specification before you order.
10000 to 20000 rpm on ER11 collets, which is the range small bores need to keep surface speed up.
1200 x 500 x 1500 mm and 1280 kg, so it installs in a tool room rather than needing a dedicated bay.
We supply documentation and remote engineer support as standard, and our engineers stay reachable on WhatsApp through commissioning.
OD and ID grinding on one machine, for shafts, bushes, needle valves and plungers.
Servo vertical feed and hydraulic table traverse on a 300 x 600 mm table.
Built for small parts, where high volume and tight size control meet.
Tell us your supply voltage and frequency, the parts you intend to grind and the accessories you need. We reply with a configured quotation and a dated schedule.
