Sealey Quality MACHINERY SM521 Instructions Manual

INSTRUCTIONS FOR: BENCH GRINDER WET

AND DRY Ø200mm/Ø150mm 250W/230V

Model No.: SM521

Thank you for purchasing a Sealey product. Manufactured to a high standard this product will, if used according to these instructions and
properly maintained, give you years of trouble free performance.

IMPORTANT: PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL REQUIREMENTS, WARNINGS, AND
CAUTIONS. USE THIS PRODUCT CORRECTLY, AND WITH CARE FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY
CAUSE DAMAGE AND/OR PERSONAL INJURY AND WILL INVALIDATE THE WARRANTY.

1. SAFETY INSTRUCTIONS

1.1 ELECTRICAL SAFETY

 WARNING! It is the responsibility of the owner and the operator to read, understand and comply with the following:
You must check all electrical products, before use, to ensure that they are safe. You must inspect power cables, plugs, sockets and
any other connectors for wear or damage. You must ensure that the risk of electric shock is minimised by the installation of
appropriate safety devices. A Residual Current Circuit Breaker (RCCB) should be incorporated in the main distribution board. We also
recommend that a Residual Current Device (RCD) is used. It is particularly important to use an RCD with portable products that are
plugged into a supply which is not protected by an RCCB. If in any doubt consult a qualified electrician. You may obtain a Residual
Current Device by contacting your Sealey dealer.
You must also read and understand the following instructions concerning electrical safety.

1.1.1 The Electricity at Work Act 1989 requires that all portable electrical appliances, if used on business premises, are tested by a qualified
electrician, using a Portable Appliance Tester (PAT), at least once a year.

1.1.2 The Health & Safety at Work Act 1974 makes owners of electrical appliances responsible for the safe condition of those appliances
and the safety of the appliance operators. If in any doubt about electrical safety, contact a qualified electrician.

1.1.3 Ensure that the insulation on all cables and on the appliance is safe before connecting it to the power supply. See 1.1.1 and 1.1.2
and use a Portable Appliance Tester.

1.1.4 Ensure that cables are always protected against short circuit and overload.

1.1.5 Regularly inspect power supply cables and plugs for wear or damage and check all
connections to ensure that none is loose.

1.1.6 Important: Ensure that the voltage marked on the appliance matches the power supply
to be used and that the plug is fitted with the correct fuse - see fuse rating at right.

1.1.7 DO NOT pull or carry the appliance by the power cable.

1.1.8 DO NOT pull the plug from the socket by the cable.

1.1.9 DO NOT use worn or damaged cables, plugs or connectors. Immediately have any faulty
item repaired or replaced by a qualified electrician. When a BS 1363/A UK 3 pin plug is
damaged, cut the cable just above the plug and dispose of the plug safely.
Fit a new plug according to the following instructions (UK only).
a) Connect the GREEN/YELLOW earth wire to the earth terminal ‘E’.
b) Connect the BROWN live wire to the live terminal ‘L’.
c) Connect the BLUE neutral wire to the neutral terminal ‘N’.
d) After wiring, check that there are no bare wires, that all wires have been correctly connected, that the cable outer insulation extends
beyond the cable restraint and that the restraint is tight.

1.1.10 Products which require more than 13A are supplied without a plug. In this case you must contact a qualified electrician to ensure
that a suitably rated supply is available. We recommend that you discuss the installation of an industrial round pin plug and socket
with your electrician.

1.1.11 If an extension reel is used it should be fully unwound before connection. A reel with an RCD fitted is preferred since any appliance
plugged into it will be protected. The cable core section is important and should be at least 1.5mm², but to be absolutely sure that the
capacity of the reel is suitable for this product and for others which may be used in the other output sockets, we recommend the use
of 2.5mm² section cable.

1.2 GENERAL SAFETY

 Disconnect the grinder from the mains power before changing accessories, servicing or performing any maintenance.
 Maintain grinder and stones in good condition. Check moving parts and alignment. If necessary use an authorised service agent.
 Replace or repair damaged parts. Use genuine parts only. Unapproved parts may be dangerous and will invalidate the warranty.
 WARNING! Always work with the grinder safety guard in place.
 The grinding wheel or stone must only be changed by persons holding an appropriate grinding wheel certificate.
 Wear approved safety goggles, ear defenders, appropriate dust mask if grinder generates dust and safety gloves.
 Remove ill fitting clothing. Remove ties, watches, rings, and other loose jewellery, and contain long hair.
 Use grinder in a suitable work area, keep area clean, tidy and free from unrelated materials, and ensure adequate lighting.
 Maintain correct balance and footing. DO NOT over-reach and ensure the floor is not slippery. Wear non slip shoes.
 Use only approved grinding stones, and only use the normal grinding surface. Never use the side of the stone.
 Check grinding stones to ensure they are not split, cracked or damaged in anyway. See chapter 4. If in doubt DO NOT use the stone.
 Grinding stones must be securely attached before use, but not over tightened.
 Keep non essential persons away from the working area, use screens if necessary.
 DO NOT operate the grinder if any parts are missing or the grinder is damaged.
 DO NOT use the grinder for a task it was not designed to perform.
 DO NOT operate grinder where there are flammable liquids or gasses.
 WARNING! DO NOT grind any materials containing asbestos.
 DO NOT get the grinder wet or use in damp or wet locations.
 DO NOT switch the grinder on whilst the stone is in contact with the workpiece.
 DO NOT cover the grinder air vents situated beneath the motor. To do so will overheat the machine.
 DO NOT touch the workpiece immediately after grinding as it will be very hot.
 DO NOT try to cool the grinding stones with water or other lubricants.
 DO NOT hold unsecured work in your hand, and DO NOT touch the grinding stone whilst operating, or whilst plugged into the mains

power.

 DO NOT leave the grinder running unattended.
 DO NOT operate the grinder when you are tired or under the influence of alcohol, drugs or intoxicating medication.
 When not in use switch grinder off, remove plug from power supply.

© Jack Sealey Ltd

Original Language Version

SM521 Issue: 1 - 07/12/12



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

DANGER OF FIRE/EXPLOSION HAZARD

man-made fibres.

2. INTRODUCTION & SPECIFICATIONS

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 anges 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.

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

3. ASSEMBLY & INSTALLATION

Wet wheel (cannot
be turned by hand)

Eye shield

Remove 3 screws
to remove cover

Spark arrestor

Fig.3

Wet wheel removal

Blotter (both sides)

Fig.2

Rest adjustment

Fig.1

OFF

ON

Direction of rotation

Slide out coolant tray

Switch

Dry wheel

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.

4. GRINDING STONES

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).

 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.

© Jack Sealey Ltd

Original Language Version

SM521 Issue: 1 - 07/12/12