Automatic Threading Foam Drilling Machine with 500-2300 mm Bore Length

The C518 bores a shaft hole and threads it in one cycle. 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 and machine weight is 2000 kg. The machine uses 3-direction clamping with automatic center positioning.

A bored roll that still needs a thread is a roll that has to be handled twice. Moving it to a second station costs a lift, a re-clamp and another chance to lose the centre line. The C518 bores and threads in the same clamping, so the thread follows the bore that was just cut.

• 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. Clamp the roll. Three-direction clamping holds the roll in position.
2. Centre. Automatic positioning sets the centre line.
3. Bore. The cutter advances to the required depth, up to 2300 mm.
4. Thread. The threading unit follows the bore in the same clamping.
5. Withdraw. The tool retracts and the clamps release.
6. Check. Confirm bore diameter, depth and thread condition.

Check the thread at the entry, not only the bore depth. A thread that starts damaged will fail at assembly even if the bore is perfect.

Two operations on two machines mean the roll is lifted, moved and clamped twice. Each move is a handling cost, and each re-clamp is a chance to lose the centre line that was set at the first station.

Boring and threading in one clamping removes the second move. The thread is cut in the bore that was just made, so the thread axis and the bore axis are the same by construction rather than by alignment.

That shows up in the finished part. A threaded roll from a two-station process can have a thread that is slightly off the bore axis, which is enough to make a shaft bind at assembly. A single-cycle roll does not have that failure mode.

• One handling: the roll is lifted once.
• Shared axis: the thread follows the bore by construction.
• Fewer rejects: no second alignment to lose.

• One clamping: the roll is not moved between boring and threading.
• Thread follows the bore: no second alignment to lose the centre line.
• Less handling: one lift instead of two.
• Deep capability: 500-2300 mm bore with the thread in the same cycle.
• Consistent results: the same position on every roll in the batch.
• Operator saving: one station instead of two.
• CE certified: export-ready guarding and electrics.

• Shaft-ready rolls: rolls bored and threaded for handling shafts.
• Peeling line feed: threaded rolls ready for the peeling machine.
• Mattress cores: centre holes with threads for shaft mounting.
• Foam rollers: threaded cores for converting lines.
• Specialty foam parts: threaded bores for inserts.
• Contract work: complete boring and threading 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 both the cutter and the threading unit. Two tools work in the same zone, and the threading unit moves after the bore is complete.

Stop the spindle before releasing the clamps. The roll must not move while either tool is in the bore.

• Check the threading tool before each batch.
• Confirm the bore depth against the order.
• Keep hands clear of the cutter and threading unit.
• Stop the spindle before releasing the clamps.
• Check bore, depth and thread at the start of the batch.

The threading tool wears faster than the cutter and is the part that decides whether the thread passes inspection. Check it at the start of each batch and replace it on condition rather than on a fixed calendar.

The clamping and centring system needs the same attention as on the boring-only version. Check the pads monthly and confirm the centre position after any work on the clamps.

• Inspect the threading tool before each batch.
• Inspect the cutter head daily.
• Check clamp pads monthly.
• Check spindle bearing play monthly.
• Lubricate clamp slides and guides monthly.

The machine ships in a reinforced export crate with the frame, clamping units and threading head braced for transport.

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