MF-207 Manual Straight Knife Grinder For Carbide And HSS Planer Blades

A hand-ground planer knife only repeats if the blade goes back to the same stop every time. Without a stop, the bevel shifts each time the knife is re-clamped, and after three sharpenings the cutting angle is no longer the angle the knife was made with.

The MF-207 is a manual straight knife grinder for carbide and HSS planer knives up to 700 mm long, with a water trough under the table. Its knife holder carries the four parts that make a bevel repeatable: a blade locator that sets the knife against a stop, a clamp plate that holds it down, an angle-adjusting handle, and a locking screw that keeps the angle once it is set.

Feed is manual, and that is the point of the machine. There is no controller and no program to write: the operator controls the feed rate directly, which is what a small shop sharpening a few sets of knives a week actually needs. Grinding is wet — the trough sits under the table and the wheel runs in it, so the edge comes off cool rather than burned and softened.

A 1.5 kW motor turns the spindle at 2840 r/min. The machine is built to GB12557-2000, measures 1100 * 500 * 1300 mm, and sets the table at waist height. Stroke and direction are selected on the front panel.

What the specification fixes, and what it leaves to the operator:

• Knife holder — blade locator, clamp plate, angle handle and locking screw on one carriage, so a bevel can be repeated.
• Blade locator — the knife is pushed against a stop, so it returns to the same position on the table each time.
• Angle handle — sets the bevel angle on the holder itself, not by tilting the grinding head.
• Locking screw — holds the angle once it is set, so it does not drift as the wheel loads up.
• Water trough — sits under the table; the wheel grinds wet, so the edge is not burned and keeps its hardness.
• Manual feed — the operator sets the feed rate; no controller, no program, no setup parameters to get wrong.
• Carbide and HSS — woodworking carbide and high-speed-steel planer knives are ground on the same bed.
• 0–700 mm grinding length — covers the knife lengths used on planers and moulders.
• 1.5 kW at 2840 r/min — spindle power and wheel speed for an even bevel across the full knife.
• 380 V supply — confirm it against your shop supply before ordering.
• GB12557-2000 — built to the published Chinese machinery standard, not to a shop-floor guess.
• 1100 * 500 * 1300 mm — compact footprint for a 700 mm grinding length, standing on four levelling feet.

What changes in a small shop that sharpens its own planer knives:

• It pays for itself on a few sets of knives. A small woodworking shop that sends planer knives out for sharpening recovers the cost of the MF-207 on a few sets, then keeps the turnaround in-house.
• The same bevel, twice. The blade locator puts the knife back on the stop and the angle handle returns the holder to the same setting, which is the difference between grinding and guessing.
• The angle stays where it was set. The locking screw holds the holder through the pass, so the bevel does not creep as the wheel loads up.
• Wet grinding keeps the hardness. The trough under the table keeps the contact point wet, so a freshly ground knife stays sharp instead of going soft after the first shift.
• Nothing to configure. Manual feed means no controller, no program and no parameters to get wrong; the operator reads the cut and adjusts by hand.
• Carbide and HSS on one table. The machine is built for both carbide and high-speed-steel planer knives, so a shop that runs both does not need two grinders.
• Built to a published standard. GB12557-2000 — the machine is made to a standard rather than to what felt right on the day.