Automatic Circular Saw Blade Sharpening Machine 100-800mm 0-25 Teeth Per Minute

A blunt TCT blade burns the cut and pulls the saw off line. Sending blades out means keeping spares in rotation and paying freight on every batch — and for a shop that runs large blades the problem is worse, because an 800 mm blade is not something you keep three of in the rack.

The NC-688 is a compact automatic circular saw blade sharpening machine. The blade is carried on a horizontal arbor with a support arm, indexed automatically and ground by a 150 * 32 * 10 mm TCT wheel. Blade capacity runs ∅100 mm to ∅800 mm, in a machine that stands only 750 * 700 * 1200 mm.

The work is held and indexed pneumatically from a ≥0.6 MPa air supply. The control arm carries its own filter-regulator and pressure gauges, so the operator can see the air pressure that indexing depends on instead of walking to a wall regulator. Teeth are indexed at 0–25 a minute.

A 0.55 kW motor turns the wheel at 2800 r/min, and coolant is delivered through segmented hoses to the grinding point. Setup is on a touchscreen, with start, pause and emergency stop below the screen on the same arm. The machine runs on 220 V / 50 Hz.

The NC-688 is the compact one in the range that still takes a large blade — 800 mm of blade in a 750 mm machine.

• Saw blade capacity ∅100 – ∅800 mm — the large end of that range is what the machine is bought for.
• Tooth indexing 0 – 25 teeth per minute — the tooth is fed past the wheel by the machine rather than by hand.
• 0.55 kW wheel motor — turns the TCT wheel through the tooth tips.
• 2800 r/min wheel speed — a controlled wheel speed for a fine, even tooth.
• 150 * 32 * 10 mm TCT wheel — grinds carbide tips rather than only HSS teeth.
• Tooth pitch 0 – 40 mm — covers the pitches used on panel and cross-cut blades.
• Pneumatic clamping and indexing — the blade is held from a ≥0.6 MPa air supply, not by a hand clamp.
• On-board filter-regulator and pressure gauges — the air the indexing depends on is visible at the machine.
• Touchscreen control — start, pause and emergency stop sit below the screen on the same arm.
• Coolant through segmented hoses — coolant is delivered to the grinding point rather than sprayed at the work area.
• Compact footprint — 750 * 700 * 1200 mm, which is small for a machine that takes an 800 mm blade.
• 220 V / 50 Hz supply — confirmed against your supply before the order is placed.

If your rack holds blades that other compact sharpeners cannot take, this is the machine in the range built for them.

• 800 mm of blade in a 750 mm machine. Blade capacity runs to ∅800 mm at a footprint of 750 * 700 * 1200 mm, so a large blade does not need a large bay.
• The air supply is on the machine. A filter-regulator and pressure gauges are carried on the control arm, so the pressure the pneumatic indexing depends on is visible where the operator is standing.
• Blades back in service the same shift. Keeping spares in rotation stops being the plan — the blade is sharpened and put straight back on the saw.
• Coolant at the tooth, not in the air. Segmented hoses deliver coolant to the grinding point, so the tip is not burnt during sharpening.
• Setup on a touchscreen. Start, pause and emergency stop sit below the screen, so nothing is reachable only from the back of the machine.
• A compact machine that still takes carbide. A 150 * 32 * 10 mm TCT wheel at 2800 r/min grinds carbide tips rather than only touching up HSS.