3-Direction Clamping Foam Drilling Machine with Automatic Center Positioning

The C518 is a foam drilling machine with 3-direction clamping and automatic center positioning. Bore hole length is 500-2300 mm, hole diameter is 50-80 mm, sponge diameter is 1200-1500 mm, motor power is 3.7 kW, machine weight is 2000 kg and the overall dimension is 6500*2000*2500 mm.

A round roll is the hardest workpiece to hold. Clamping from one direction pushes the roll out of line, and the bore follows the roll. Three-direction clamping holds the roll from above and both sides, so the centre stays where it was set before the cutter enters.

• Model: C518
• Bore length: 500-2300 mm
• Hole diameter: 50-80 mm
• Sponge diameter: 1200-1500 mm
• Motor power: 3.7 kW
• Weight: 2000 kg

1. Load the roll. Bring the roll onto the support and against the end stop.
2. Close the clamps. The three-direction clamps close on the roll from above and both sides.
3. Locate the centre. Automatic centring sets the centre line for the bore.
4. Bore. The cutter advances through the roll at the set feed.
5. Withdraw. The cutter retracts and the clamps release.
6. Check. Measure the bore at the entry and the exit.

Check the bore at the exit as well as the entry. A roll that was not clamped square shows a difference between the two ends.

A cylindrical roll has no flat face to register against. A single clamp pushes it away, and a two-direction clamp still lets it rotate. Three-direction clamping holds the roll on both sides and from above, which fixes the position before the cutter starts.

Automatic centring builds on that. Once the roll is held, the machine locates the centre line, so the operator does not judge the centre by eye. That removes the variation between one roll and the next, which is what matters on a batch.

The result is a bore that is in the same place on every roll. Shafts fit consistently, and the peeling line receives rolls that sit straight rather than rolls that rock on the shaft.

• Three-direction hold: the roll cannot move or rotate.
• Automatic centring: the centre is set by the machine.
• Batch consistency: the same bore position on every roll.

• Stable clamping: three directions stop the roll moving during the bore.
• Automatic centring: the centre line is set by the machine, not by eye.
• Roll range: 1200-1500 mm sponge diameter covered without adapters.
• Full-length bore: 500-2300 mm in one pass.
• Repeats between rolls: the same centre position every cycle.
• Compact frame: 6500*2000*2500 mm on the line.
• CE certified: export-ready guarding and electrics.

• Cylindrical foam rolls: centre holes for shaft insertion.
• Peeling line feed: rolls bored ahead of the peeling machine.
• Mattress cores: centre holes for shaft-based handling.
• Filter foam: axial holes through cylindrical parts.
• Roll foam conversion: bored rolls for further cutting.
• Contract boring: repeated roll sizes on one machine.

Boring faults on a clamped drilling machine are usually set-up faults. Check clamping, centre height and cutter condition before adjusting the machine, because those three cause most rejects.

Keep hands clear of the clamps when they close. Three-direction clamping closes from several sides at once, and the gap between the roll and the pad is small.

Stop the spindle before releasing the clamps. A roll that is released while the cutter is turning can move against the cutter.

• Confirm the roll diameter is within 1200-1500 mm.
• Check the end stop before clamping.
• Keep hands clear of the clamp path.
• Stop the spindle before releasing the clamps.
• Measure the bore at both ends.

The clamp pads and the centring system are what hold accuracy. Check the pads for wear monthly and verify the centring position against a known roll after any adjustment.

The cutter head and spindle need the usual checks. A dull head tears the bore wall and loads the spindle, which shows up as vibration before it shows up as a dimension error.

• Inspect cutter heads daily.
• Check clamp pads for wear monthly.
• Verify centring position monthly.
• Check spindle bearing play and belt tension monthly.
• Lubricate clamp slides and guides monthly.

The machine ships in a reinforced export crate with the frame and clamping units braced for transport, sized to the 6500*2000*2500 mm envelope.

The shipment includes the clamping specification, layout drawing and a commissioning checklist, with remote support during installation.