VONROC BG501AC Bench Grinder Instructions

BENCH GRINDER
BG501AC / S_BG501AC
Original Instructions

BG501AC Bench Grinder

SAFETY INSTRUCTIONS

Read the enclosed safety warnings, the additional safety warnings and the instructions. Failure to follow the safety warnings and the instructions may result in electric shock,  fire and/or serious injury.
Save the safety warnings and the instructions for future reference.
The following symbols are used in the user manual or on the product:

| Read the user manual.
---|---
|  Denotes risk of personal injury, loss of life or damage to the tool in case of non  observance of the instructions in this manual.
|  Risk of electric shock.
|  Immediately remove the mains plug from the mains if the mains cable becomes damaged
and during cleaning and maintenance.
|  Wear safety goggles.
Wear hearing protection.
| Wear a dust mask.
|  Wear safety gloves.
|  Risk of flying objects. Keep bystanders away from the work area.
| Variable electronic speed.
|  Class II machine – Double insulation You don’t need any earthed plug.
|  Do not dispose of the product in unsuitable containers.
|  The product is in accordance with the applicable safety standards in the European directives.

GENERAL POWER TOOL SAFETY WARNINGS
WARNING! Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury.

GENERAL POWER TOOL SAFETY WARNINGS
WARNING! Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury.
Save all warnings and instructions for future reference.
The term “power tool” in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.

Work area safety
a) Keep the work area clean and well lit. Cluttered or dark areas invite accidents.
b) Do not operate power tools in explosive atmos­ pheres, such as in the presence of flammable liquids, gases or dust. Power tools create sparks which may ignite the dust or  fumes.
c) Keep children and bystanders away while opera­ ting a power tool. Distractions can cause you to lose control.

Electrical safety
a) Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and  matching outlets will reduce risk of electric shock.
b) Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and refrigerators. There is an increased risk of elec- tric shock if your body is earthed or grounded.
c) Do not expose power tools to rain or wet condi­tions. Water entering a power tool will increase the risk of electric shock.
d) Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep cord away from heat, oil, sharp edges or moving parts. Damaged or  entangled cords increase the risk of electric shock.
e) When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
f) If operating a power tool in a damp location is unavoidable, use a residual current device (RCD) protected supply. Use of an RCD reduces the risk of electric shock.

Personal safety
a) Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use a power tool while you are tired or under the influence of drugs,  alcohol or medication. A moment of inattention while operating power tools may result in serious personal injury.
b) Use personal protective equipment. Always wear eye protection. Protective equipment such as dust mask, non-skid safety shoes, hard hat, or hearing protection used for  appropriate conditions will reduce personal injuries.
c) Prevent unintentional starting. Ensure the switch is in the off­position before connecting to power source and/or battery pack, picking up or carrying the tool. Carrying  power tools with your finger on the switch or energising power tools that have the switch on invites accidents.
d) Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left attached to a rotating part of the power tool may result in personal injury.
e) Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
f) Dress properly. Do not wear loose clothing or jewellery. Keep your hair, clothing and gloves away from moving parts. Loose clothes, jewellery or long hair can be caught in  moving parts.
g) If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. Use of dust collection can reduce dust  related hazards.
h) Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles. A careless action can cause severe injury within a fraction of a second.

Power tool use and care
a) Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at the rate for which it was designed.
b) Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with the switch is dangerous and must be repaired.
c) Disconnect the plug from the power source and/or the battery pack from the power tool before making any adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of starting the power tool accidentally.
d) Store idle power tools out of the reach of child­ ren and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool. Power tools  are dangerous in the hands of untrained users.
e) Maintain power tools. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tool’s operation. If  damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools.
f) Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.
g) Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into account the working conditions and the work to be performed. Use of  the power tool for operations different from those intended could result in a hazardous situation.
h) Keep handles and grasping surfaces dry, clean and free from oil and grease. Slippery handles and grasping surfaces do not allow for safe handling and control of the tool in unexpected situations.

Battery tool use and care
a) Recharge only with the charger specified by the manufacturer. A charger that is suitable for one type of battery pack may create a risk of fire when used with another  battery pack.
b) Use power tools only with specifically design­ ated battery packs. Use of any other battery packs may create a risk of injury and fire.
c) When battery pack is not in use, keep it away from other metal objects, like paper clips, coins, keys, nails, screws or other small metal objects that can make a connection  from one terminal to another. Shorting the battery terminals together may cause burns or a fire.
d) Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally occurs, flush with water. If liquid contacts eyes, additionally seek  medical help. Liquid ejected from the battery may cause irritation or burns.
e) Do not use a battery pack or tool that is dama­ ged or modified. Damaged or modified batteries may exhibit unpredictable behaviour resulting in fire, explosion or risk of  injury.
f) Do not expose a battery pack or tool to fire or excessive temperature. Exposure to fire or temperature above 130 °C may cause explosion.
NOTE The temperature „130 °C“ can be replaced by the temperature „265 °F“.
g) Follow all charging instructions and do not charge the battery pack or tool outside the temperature range specified in the instructions. Charging improperly or at  temperatures outside the specified range may damage the battery and increase the risk of fire.

Service
a) Have your power tool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained.
b) Never service damaged battery packs. Service of battery packs should only be performed by the manufacturer or authorized service providers.

SPECIAL SAFETY INSTRUCTIONS
When using the machine for the first time:

• Check the following:

• Does the voltage rating of the bench grinder correspond to the power supply?

• Is an earthed mains power socket available?

• Are the power cord and plug in good condition (solid, without fraying or other damage)?

• Avoid the use of long extension cords. The extension cords you use  must always be earthed.

• A grinding wheel is a brittle tool piece. The stone is not resistant to knocks.

• Always grind on the front edge of the grinding wheel, and never on the side of the grinding wheel. Never fit a cracked grinding wheel. Replace it immediately, as the high  rotational speed could cause the stone to fly apart, causing a serious accident.

• Always wear safety glasses when grinding.

• Never grind without the cover fitted over the grinding wheel.

• Always fit the grinding wheel cover and tool rest tightly, and with the correct clearance.

• Never allow more than 1-1.5 mm clearance between tool rest and grinding wheel.

• Only use the grinding wheel for the work it was designed for (for example sharpening tools), and NOT for heavy construction work.

• The following information must be available, before you fit any new grinding wheel:

• Details about the manufacturer.
  • Binding material.
  • Dimensions.
  • Permissible rotational speed.

• Never ream out the hole in a grinding wheel to a larger diameter.

• The maximum rotational speed of the grinding wheel should never be allowed to exceed the maximum speed given for the wheel.

• Never use any grinding wheel that is damaged or deformed.

• In order to be able to grind safely, the machine must be firmly bolted to a workbench.

• The tool rest should be replaced whenever the width of the tool rest measures less than 20 mm.

• The recommended depth of the recess in the flange (T) is 2 mm and the diameter of the spindle hole is 10 mm (see Fig. B).

• Always keep the cord away from the moving parts of the machine.

• In the case of locking, switch the machine off immediately and remove the plug from the mains.

• Compare the maximum number of revolutions allowed of the accessories with the number of revolutions of the machine.

• When you put the machine away the engine must be switched off and moving parts must have reached a standstill.

• Never attach an assembly spanner to your machine with a piece of string or anything similar.

• Never use the axle locking button if the machine is operating.

• Make sure that the spring chuck diameter is the same as the axle diameter of the accessory.

• Use a clamping device for securing the work piece.

• Keep your hands away from the work piece.

Whenever using the machine

• Check that the switch is NOT in the ‘ON/1’ position before connecting the machine to the power supply.
• Always keep the power cord out of the way of the tool’s moving parts.

Immediately switch off the machine when:

• The plug or power cord is defective or damaged.
• The switch is defective.
• You smell smoke or burning insulation.

Electrical safety
When using electric machines always observe the safety regulations applicable in your country to reduce the risk of fire, electric shock and personal injury. Read the following safety instructions.
Always check that the voltage of the power supply corresponds to the voltage on the rating plate label.

Replacing cables or plugs
Immediately throw away old cables or plugs when they have been replaced by new ones. It is dangerous to insert the plug of a loose cable in the wall outlet.
Using extension cables
Only use an approved extension cable suitable for the power input of the machine. The minimum conductor size is 1.5 mm
When using a cable reel always unwind the reel completely.

MACHINE INFORMATION

Intended use
The bench grinder is a combination tool for the grinding and polishing of metals, plastics and other materials using the appropriate grinding wheels.
The flexible shaft is intended to function as a grinder, sander, wire brush, polisher, carving or cut-off tool. This rotary multi tool is great for editing of materials like wood, plastic, stone, shell aluminium, brass and steel. Always use the proper accessories and speed setting.

TECHNICAL SPECIFICATIONS

Load factor
A load factor of S2 = 5 min (intermittent periodic duty) means that you may operate the motor continuously at its nominal power level for no longer than the time stipulated on the specifications label (5 minutes ON period). If you fail to observe this time limit the motor will overheat. During the OFF period the motor will cool again to its starting temperature.

Vibration level
The vibration emission level stated in this instruction manual has been measured in accordance with a standardized test given in EN 62841; it may be used to compare one tool with another and as a preliminary assessment of exposure to vibration when using the tool for the applications mentioned.

• Using the tool for different applications, or with different or poorly maintained accessories, may significantly increase the exposure level.
• The times when the tool is switched off or when it is running but not actually doing the job, may significantly reduce the exposure level.

Protect yourself against the effects of vibration by maintaining the tool and its accessories, keeping your hands warm, and organizing your work patterns.

DESCRIPTION
The numbers in the text refer to the diagrams on pages 2-3.

1. On/Off switch
2. Spark guard
3. Spark guard bracket
4. Safety guard
5. Grinding wheel
6. Polishing wheel
7. Tool rest adjustment knob
8. Tool rest
9. Mounting holes
10. Spark guard adjusting screw
11. Speed adjustment knob
12. Flexible shaft
13. Locking pin
14. Wrench

ASSEMBLY

The grinder must be firmly bolted to a workbench.
The length of the fixing bolts will depend on the thickness of the workbench. If the workbench is made of steel, it is advisable to use a wooden block or plank between the  grinder and the bench, to insulate it and prevent vibration.
Assembly and adjustment of spark guard bracket and spark guard (Fig. C & D)
The spark guard bracket and spark guard should only ever be assembled/adjusted with the grinding wheel stationary, and the machine disconnected from the power supply.

• Fix the spark guard bracket (3) to the grinding wheel cover, using the screws provided (10).
• Set the spark guard bracket at the correct height. The clearance between the wheel and the spark guard bracket should be 1 to 1.5 mm.
• Next tighten the screws (10) firmly.
• Fix the spark guard (2) to the spark guard bracket (3).
• Position the spark guard to give maximum protection when working.
• Always wear safety glasses.

Fitting and adjusting tool rest (Fig. E)
The tool rest should only be adjusted when the grinding wheel is completely stationary, and the machine is disconnected from the power supply (the wall socket).

• Fit the tool rest (8) as shown in Fig. E.
• Fix it as tightly as possible in position, with a maximum clearance of 1 to 1.5 mm between the tool rest (8) and the grinding wheel (5).

Replacing the grinding wheel (Fig. F, G & H)
Required tools:

• 17 mm spanner

• Screwdriver
  Only ever replace the grinding wheel when the motor is at a standstill and the power is completely disconnected.

• Remove the grinding wheel guards (4) using the tools listed above. The spindle nut on the righthand side has a right-handed thread.
  The spindle nut on the left-hand side has a left-handed thread. Keep this in mind when you are replacing the grinding wheels.

• Loosen the nut using the correct spanner. Remove the old wheel from the spindle.

• Clean the flanges. Place one flange (A) back on the spindle, with the hollow side facing the grinding wheel. Slide the new wheel onto the spindle. Place the second flange (A) on the spindle, again with the hollow side facing the grinding wheel. Now tighten the nut on the spindle. Do not overtighten! Now refit the grinding wheel cover, and again adjust the tool rest correctly. Run the motor briefly, without grinding.

Flexible shaft (Fig. I)
Mount the flexible shaft (12) on the bench grinder.
The ring of the flexible shaft (12) can then be fastened onto the bench grinder.
To mount an accessory in the flexible shaft (Fig. J)
Lock the spindle by putting the pin (13) in the pin opening. Then loosen the chuck with the chuck spanner (14) and place the accessory. Keep the pin (13) in place and tighten  the chuck. Make sure to remove the pin (13) before operating the machine.
Accessories for the Rotary multi tool
Always check that the maximum rpm of the accessory is suitable for the maximum speed of the Multi tool.

OPERATION

Selecting the grinding wheel
Coarse grinding wheels will in general remove the most material, and fine grinding wheels are used for finishing. If the surface is uneven, begin by using a coarse grinding  wheel, and grind the workpiece until it is smooth. Next use a fine grinding wheel to remove the grooves and scratching left by the coarse wheel, and finish off the workpiece.

How to grind (Fig. A)
To prevent the grinding surface from blocking up, avoid holding wood, lead or any other soft material or metal against the grinding wheel. To avoid crea- ting grooves, do not  press the workpiece too firmly on the grinding wheel. Use water to regularly cool the workpiece being ground. Wood chisels and the like should never be sharpened  ‘blue’. Take care not to lose your grip on the object being ground, as it may suddenly become jammed between the tool rest and the grinding wheel. This can cause the stone to shatter, the motor to seize, or the workpiece to fly off, all of which can cause injury and damage. Whenever the machine has been in use for 30 minutes, it should be switched off. Allow the machine to cool down to room temperature.

Switching the machine on

• Check that the switch (1) is in the “OFF/0” position before connecting the machine to the power supply.
• Press the power switch (1) into the “ ON/1” position to start your bench grinder.
• Always keep the power cord out of the way of the tool’s moving parts.

Speed Adjustment (Fig. A)
The required speed can be adjusted by using the Speed adjustment knob (11). Also during running the rotational speed can be adjusted.

• To increase the speed, turn the Speed adjustment knob (11) clockwise.
• To decrease the speed, turn the Speed adjustment knob (11) anti-clockwise.

The required speeds depends on the material and can be determined by practical testing.

MAINTENANCE

Always disconnect the machine from the main power supply before carrying out any maintenance work.
Clean the machine casings regularly with a soft cloth, preferably after each use. Make sure that the ventilation openings are free of dust and dirt. Remove very persistent dirt using a soft cloth moistened with soapsuds. Do not use any solvents such as gasoline, alcohol, ammonia, etc. Chemicals such as these will damage the synthetic components.

ENVIRONMENT
Faulty and/or discarded electrical or electronic apparatus have to be collected at the appropriate recycling locations.
Only for EC countries
Do not dispose of power tools into domestic waste.
According to the European Guideline 2012/19/EC for Waste Electrical and Electronic Equipment and its implementation into national right, power tools that are no longer  usable must be collected separately and disposed of in an environmentally friendly way.

WARRANTY

VONROC products are developed to the highest quality standards and are guaranteed free of defects in both materials and workmanship for the period lawfully stipulated  starting from the date of original purchase. Should the product develop any failure during this period due to defective material and/or workmanship then contact VONROC  directly.
The following circumstances are excluded from this guarantee:

• Repairs and or alterations have been made or attempted to the machine by unauthorized service centers;
• Normal wear and tear;
• The tool has been abused, misused or improperly maintained;
• Non-original spare parts have been used.

This constitutes the sole warranty made by company either expressed or implied. There are no other warranties expressed or implied which extend beyond the face hereof, herein, including the implied warranties of merchantability and fitness for a particular purpose. In no event shall VONROC be liable for any incidental or consequential damages. The dealers remedies shall be limited to repair or replacement of nonconforming units or parts.

The product and the user manual are subject to change. Specifications can be changed without further notice.

DECLARATION OF CONFORMITY
BG501AC / S_BG501AC – BENCH GRINDER

We declare under our sole responsibility that this product is in conformity with directive 2011/65/EU of the European parliament and of the council of 8 June on the  restriction of the use of certain hazardous substances in electrical and electronic equipment is in conformity and accordance with the following standards and regulations:
EN 62841-1, EN 62841-3-4, EN ISO 12100, EN 55014-1, EN 55014-2,
EN 61000-3-2, EN 61000-3-3, 2006/42/EC, 2012/19/EU, 2014/30/ EU, 2011/65/EU VONROC
Lingenstraat 6
8028 PM Zwolle
The Netherlands ©2022 VONROC
WWW.VONROC.COM
2206-22

References

• VONROC Gereedschap & Tuin artikelen

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