Sealey SM521 - Manual (Page 2)

4. GRINDING STONES
2. INTRODUCTION & SPECIFICATIONS
3. ASSEMBLY & INSTALLATION
Model No: SM521
Motor: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .230V/250W
Fuse rating: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A
Axle Diameter (Ø150 Wheel): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12.7mm
Axle Diameter (Ø200 Wheel): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20.0mm
Loaded With (Ø150 Dry Wheel Model Nos.):. . . . . . . BG 150/15 (Fine), BG150/16 (Coarse)
Loaded With (Ø200 Wet Wheel): . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . .SM521GW200W
No Load Speed (Ø150 Wheel): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2970rpm
No Load Speed (Ø200 Wheel): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135rpm
Worm/Wheel ratio: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22:1 Reduction
Weight: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12.3kg
Unpack the product and check contents. If there are any damaged or missing parts contact your supplier immediately.
 WARNING! Before assembly check to ensure grinder is unplugged from mains.
3.1 EYESHIELD
3.1.1 Adjust eyeshield so that the perspex shield provides maximum protection against debris being thrown from the wheel.
3.2 TOOL REST
3.2.1 Tool rest should be adjusted to provide no more than a 2mm gap between the wheel and rest.
3.2.2 Turn the dry wheel by hand to check that this distance remains true for the complete rotation.
3.3 SPARK ARRESTOR
3.3.1 Adjust spark arrestor to ensure that the lower edge is no more than 2mm from the surface of the wheel.
3.4 WHEEL DRESSING
3.4.1 The rotating toothed wheels of the wheel dresser should be placed in gentle contact with the grinding face of the wheel.

WARNING: Wheel dressing should only be carried out by a suitably trained and qualified person.
3.5 INSTALLATION
3.5.1 Bolt the grinder securely to a fireproof workbench using the base securing slots as a template. Check that all assembly
nuts and bolts are secure then read section 4 (grinding stones) before use.
DANGER OF FIRE/ExPLOSION HAzARD
 WARNING! The grinding process can produce streams of sparks which are a potential source of ignition.
 DO NOT use the grinder where there are flammable liquids, solids or gases.
 DO NOT allow grinder sparks to make contact with the operator’s clothing or any other fabric such as cleaning rags. Fabrics contaminated with
flammable materials such as petrol, oil, grease, paint and solvents are a particular fire hazard.
 To reduce the risk of clothing catching fire the operator should wear wool or cotton outer garments treated with a fire retardant in preference to
man-made fibres.
Original Language Version
Supplied with 230V Induction motor drive and fully guarded, suitable for workshop use. Suitable for sharpening fine blades. Supplied with
Ø200mm wet stone and Ø150mm dry stone, ready to use with adjustable eyeshield and spark arrestor. Equipped with fully CE approved
safety guards and wheel location flanges to meet current EU abrasive wheel regulations. Motor and switch gear meet CE low voltage and
EMC directives, double insulated for extra operator safety. Fitted with a BS approved safety plug.
4.1 MANDATORY SAFETY INSTRUCTIONS (The following instructions must be observed together with section 1 safety).
DANGER! Use of a damaged stone is dangerous and may cause damage and/or personal injury.
 WARNING! Ensure grinder is unplugged from the mains power supply before attempting to change grinding stones (or wheel).

Only persons qualified under the “Abrasive Wheels Regulations” and holding a current grinding wheel certificate are authorised
to change and dress grinding stones (wheels).
SM521 Issue: 1 - 07/12/12 © Jack Sealey Ltd
Fig.1
Fig.3
Fig.2
Wet wheel (cannot
be turned by hand)
Dry wheel
Eye shield
Switch
ON OFF
Rest adjustment
Remove 3 screws
to remove cover
Blotter (both sides)
Slide out coolant tray
Spark arrestor
Wet wheel removal
Direction of rotation

Grinding stones (wheels) used with this machine must be of an adequate speed rating and suitable for the material to be ground.

Ensure the grinding stone’s maximum speed specification is higher than that indicated on the machine data plate.
 Check grinding stone is secure, the stone is not worn or damaged and that there are no splits or cracks. If damaged replace
immediately.

Ensure replacement stone is not damaged in any way such as cracks, deformations or splinters etc. Also check the mounting flanges
to ensure they are not deformed, burred or chipped. Damaged items must NOT be used as they may cause irregular pressure on the
stone which may cause a stone to break. DO NOT over tighten a stone. Never tamper with a stone in order to adapt it to a different size
holder.

Install a new stone as in 4.2. Once mounted on the grinder test the stone before use by facing the grinder in a safe direction (point
away from yourself, others and vulnerable items) and run for a short time. Dress the stone if necessary.