Indexable Insert Grinding Machine Magnetic Chuck 150 Inserts Per Load 410mm

Indexable inserts are bought by the box and thrown away when they chip. But a chipped insert is usually chipped on one corner — the other edges are still good. On a cutter head running dozens of inserts, replacing the chipped ones every few weeks is a consumables line that nobody stops to question.

The MF-400B is an indexable insert grinding machine. The bed is a 410 * 110 mm magnetic chuck with a water trough beneath it, and it holds up to 150 inserts in a single loading. A whole cutter head's worth of inserts goes on at once and comes off ground to the same height — which is what stops one proud insert from taking the whole cut.

The grinding head carries a ∅150 * 32 mm wheel on a 3 kW spindle turning at 2840 r/min, and travels along a rail above the bed. Travel speed is set by a variable-frequency drive rather than by a belt and pulley, so the pass can be matched to the size of insert being ground. The chuck is driven by a 250 W motor.

Coolant is pumped to the grinding point by a 40 W pump, and setup is on a touchscreen with a mushroom emergency stop, a start button and a stop button below it. The machine stands 1500 * 600 * 1480 mm on a painted steel cabinet.

The two numbers that matter here are 150 and 410: how many inserts go on at once, and how long the bed is that they go on.

• Holds 150 inserts in one loading — a whole cutter head's worth goes on the bed at once.
• Magnetic chuck 410 * 110 mm — the inserts are held magnetically, so loading and unloading is a sweep of the hand rather than 150 clamps.
• Grinding length 410 mm — the full length of the chuck face is ground in one pass.
• Water trough under the work bed — the wheel grinds wet, so the insert edges do not burn.
• 3 kW spindle — enough spindle power to take a full pass over a loaded bed.
• 2840 r/min spindle speed — a controlled wheel speed for a fine, even face.
• ∅150 * 32 mm grinding wheel — a wheel sized for touching up small carbide inserts.
• Grinding head on a rail — the head is carried along a rail above the bed instead of the work being moved under it.
• Variable-frequency travel — the pass speed is set electrically rather than by changing pulleys.
• 250 W chuck motor — drives the magnetic chuck.
• 40 W coolant pump — delivers coolant to the grinding point.
• Touchscreen with emergency stop — start, stop and a mushroom emergency stop, on a column beside the work.
• 1500 * 600 * 1480 mm — a compact footprint for a 410 mm chuck and a 3 kW spindle.

If your shop runs indexable tooling, the MF-400B turns inserts from a consumable back into a part.

• 150 inserts per load, not one at a time. A 410 * 110 mm magnetic chuck swallows a full cutter head's worth of inserts, so the batch is ground in one setting rather than in 150.
• Every insert comes off the same height. Because the whole batch is on the chuck and ground under the same pass, the inserts match — which is what stops one proud insert from taking the whole cut.
• Magnetic holding, not clamps. The magnetic chuck grips the inserts directly, so there is nothing standing up on the bed for the wheel to hit.
• Wet grinding keeps the hardness. The water trough under the bed means the edge is not burnt, so a touched-up insert holds its edge instead of going soft in service.
• The pass matches the insert. A variable-frequency drive on the travel lets the speed be set to the size of the insert, rather than to whatever a fixed pulley gives.
• Wheel and spindle sized together. A 3 kW spindle at 2840 r/min driving a ∅150 * 32 mm wheel — enough to take a full pass over a loaded bed without loading up.