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Silver metal straight pencil grinder with rear exhaust and non-slip grip

DYNABRADE

DYNABRADE 51810 Straight Pencil Grinder 0.1 hp 100000 RPM

SKU CH-VRJT-JPA3K

Straight pencil grinder delivers 0.1 hp at 100000 RPM with 1/8 in collet and rear exhaust

  • 1 hp motor delivers high-speed precision
  • 100000 RPM max speed enables fine detailing
  • 1/8 in collet accepts small accessories
  • 1/4 in NPT female inlet connects standard air lines
  • Rear exhaust directs airflow away from work

DYNABRADE 51810 Pencil Grinder

The DYNABRADE 51810 is a pneumatic straight pencil grinder built for precision deburring, grinding, and finishing in tight spaces. It suits metalworkers, toolmakers, and maintenance technicians who need lightweight, high-speed material removal. The bare tool design fits existing air systems without extra accessories. Operators seeking electric or cordless alternatives will not find that capability here.

0.1 hp at 100000 RPM capacity

A 0.1 hp motor drives the 1/8 in collet to a free speed of 100000 RPM for fine detail work on metal, composites, and hardened materials. The rear exhaust directs airflow away from the workpiece and operator. High-speed precision is the focus; heavy stock removal or large-diameter cutting tools exceed the spindle power and collet range.

Rear exhaust thermals and air consumption

Rear exhaust routing carries heat and oil mist away from the grip area during extended runs. The non-slip grip remains secure when vibration and temperature rise. No lock-on or lock-off switches are fitted, so the throttle lever controls runtime directly. Air flows through a 1/4 in NPT female inlet with a 1/4 in ID whip hose; supply pressure and volume determine actual power delivery.

How it compares

Measured against everything we stock in Air & Hydraulic Power Tools, at today’s prices. Recalculated every night.

Price $644.99
Pricier than about 90% of the 243 comparable items (median $61.99).

Specifications

Product
Brand nameDYNABRADE

Questions about this item

Will the 1/4 in NPT Female air inlet connect to the 1/4 in whip hose on my existing compressor line?

Yes, the 1/4 in NPT Female inlet matches the 1/4 in whip hose supplied, so it threads directly onto standard 1/4 in NPT male fittings.

How can I verify the grinder is reaching its 100000 RPM rating once installed?

Listen for the characteristic high-pitched turbine whine and confirm smooth, vibration-free operation at the rear exhaust; a drop in pitch indicates insufficient air pressure or flow.

Does the 51810 come with collets or bits, or do I need to purchase the 1/8 in collet separately?

The box contains the bare tool and a 1/4 in I.D. whip hose; the 1/8 in collet is factory-fitted, so no separate collet purchase is required.

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