metabo BS 175 Combo Bench Grinder Instruction Manual

PROFESSIONAL POWER TOOL SOLUTIONS
Instruction Manual

BS 175/ DS 125/ DS 150/ DS 175
DS 200/ DSD 200/ DSD 250
TNS 175

Original instructions
www.metabo.com 

| BS 175| BS 175
*1) Serial Number: 01750| DS 150| DS 175| DS 200| DSD 200| DSD 250| TNS 175
---|---|---|---|---|---|---|---|---
D min x B| mm (in)| 131×25 (5 5/32 x 1)| 87×20 (3 7/16x 25/32)| 84×20 3 5/16x 25/32)| 131×25 (5 5/32 x 1)| 150×25 (5 29/32 x 1)| 150×25 (5 29/32 x 1)| 200×40 (7 7/8 x 1 9/16)| 131×25 (5 5/32 x 1)
D max x B| mm (in)| 175×25 (7 x 1)| 125×20 (5 x 3/4)| 150×20 (6 x 3/4)| 175×25 (7 x 1)| 200×25 (8 x 1)| 200×25 (8 x 1)| 250×40 (10 x 1 1/2)| 175×25 (7 x 1)
d| mm (in)| 32 (1 1/4)| 20 (3/4)| 20 (3/4)| 32 1 1/4)| 32 (1 1/4)| 32 (1 1/4)| 51 (2)| 32 (1 1/4)
D N, max x B| mm (in)| –| –| –| –| –| –| –| 200×40 (8 x 1 1/2)
d N| mm (in)| –| –| –| –| –| –| –| 20 (3/4)
B max| mm (in)| 25 (1)| 20 ( 25/32)| 20 ( 25/32)| 25 (1)| 25 (1)| 25 (1)| 40 (1 9/16)| 25 (1)
A| mm (in)| 1020×50 (40 1/6 x 2)| –| –| –| –| –| –| –
n 0| min-1(rpm)| 2980| 2980| 2980| 2980| 2980| 2980| 1490| 2980
v 0| m/s| 18| –| –| –| –| –| –| –
P 1| W| 500| 200| 350| 500| 600| 750| 650| 500
P 2| W| 310| 130| 200| 310| 420| 550| 490| 310
M K| Nm| 2,3| 0,9| 1,1| 2,3| 2,6| 7,2| 10| 2,3
m| kg (lbs)| 14,9 (32.8)| 7,5 (16.5)| 9,5 (21)| 14,9 (32.8)| 16,6 (36.6)| 17,2 (37.9)| 33,8(74.5)| 15,2 (33.5)
L pA /K pA| dB(A)| 71 / 3| 52 / 3| 58 / 3| 61 / 3| 70 / 3| 72 / 3| 57 / 3| 61 / 3
L WA /K pA| dB(A)| 85,9 / 3| 77,6 / 3| 75,7 / 3| 82 / 3| 78,7 / 3| 82,8 / 3| 75,3 / 3| 81,1 / 3
L pAI /K pA| dB(A)| 73,8 / 3| 66,4 / 3| 63,6 / 3| 69,8 / 3| 66,8 / 3| 70,4 / 3| 62,8 / 3| 68,9 / 3

2) 2014/30/EU, 2006/42/EC, 2011/65/EU
3) EN 62841-1:2015, EN 62841-3-4:2016+A11:2017, EN 50581:2012.

2020-08-12, Bernd Fleischmann
Direktor Produktentstehung & Qualität (Vice President Product Engineering & Quality) *4) Metabowerke GmbH – Metabo-Allee 1 – 72622 Nuertingen, Germany

Declaration of Conformity

We declare under our sole responsibility: These bench grinders, identified by type and serial number 1), comply with all relevant requirements of the directives 2) and tandards 3). Technical file at 4) – see page 4.

Specified Use

The grinders are suitable for dry, peripheral grinding of metals – only in dry rooms and for occasional grinding. The workpiece is guided by hand.
The belt sander (BS 175) is also suitable for dry sanding of metal and derived wood products.
The dry/wet grinder (TNS 175) can also be used for sharpening knives, chisels, shears and other cutting tools, in addition to processing small metal workpieces on the wet grindstone.
The grinders are not suitable for grinding aluminum, magnesium or other materials associated with a risk of fire or explosion.  ot suitable for polishing.
Not suitable for grinding materials that could produce dust harmful to health. The user bears sole responsibility for any damage caused by improper use.
Generally accepted accident prevention regulations and the enclosed safety information must be observed.
Operating mode S2 (30 min) refers to short-term operation with a maximum operating time of 30 minutes. The unit must be switched off after 30 minutes and cool down.

General Safety Instructions

For your own protection and for the protection of your electrical tool, pay attention to all parts of the text that are marked with this symbol!
WARNING – Reading the operating instructions will reduce the risk of injury.
WARNING – Read all safety warnings, instructions, illustrations, and specifications provided with this power tool.
Failure to follow all instructions listed below may result in electric shock, fire, and/or serious injury.
Save all warnings and instructions for future reference. Pass on your electrical tool only together with these documents.

Special Safety Instructions

**** For your own protection and for the protection of your power tool, pay attention to all parts of the text that are marked withthis symbol!
a) Do not use a damaged accessory. Before each use, inspect the accessory such as the abrasive wheel for chips and cracks. After inspecting and installing an accessory,
position yourself and bystanders away from the plane of the rotating accessory and run the power tool at maximum no-load speed for one minute. Damaged accessories will normally break apart during this test time.
b) The rated speed of the accessory must be at least equal to the maximum speed marked on the power tool. Accessories running faster than their rated speed can break and fly apart.
c) Never grind on the sides of a grinding wheel. Grinding on the side can cause the wheel to break and lfy apart.
The grinding wheel must match the machine. Observe the maximum grinding wheel diameter and thickness. The hole diameter must match the back flange without play. Do not use adapters or reducers.
Do not drill grinding wheels.
Do not trim grinding wheels.
The grinding wheels must be fitted perfectly and turn freely.
Prior to using the grinding wheels, ensure that they are free from defects. A sound inspection has to be carried out to detect cracks.
Damaged, eccentric or vibrating or deeply furrowed sanding discs must not be used.
When clamping the grinding wheels, only the flanges included in the delivery must be used. The intermediate layers between the flange and grinding tool must be made of elastic materials, e.g. soft cardboard etc.
Protect grinding wheels against shocks, bumps and grease.
Grinding discs must be stored and handled with care in accordance with the manufacturers instructions.
Do not touch the rotating grinding wheel!

Always use the guard (7), the workpiece support(8), the transparent guard/Eye preservers (9) and the spark deflector (10) as required for the tools;
Only work when the safety cover (1) and sanding belt cover (16) is fitted.
Swivel the eye preservers (9) downwards before grinding.
Use the perimeter (not the sides) of the grinding wheels for grinding.

Do not reduce the speed of the grinding wheel by pressing on the sides.
The workpiece to be processed must be large enough, or small enough, to be held safely with both hands.
Only work when the grinding wheels are fitted to minimize the risk of coming into contact with the rotating spindle.
High temperatures can result after a long-term operation.

WARNING
**** Always wear eye goggles, and hearing protection protective gloves. Use other available personal protective equipment, e.g. suitable otective work clothing. Ensure that sparks roduced during work do not constitute a risk to the user or other personnel and are not able to ignite inflammable substances. Endangered areas must be protected with flame-resistant covers. Make sure that fire-risk areas are always provided with suitable fire extinguishers.

The workpiece can become hot during grinding. Do not allow water within the vicinity of electric machine parts or close to people in the working area.
If a grinding material blockage occurs, switch off the grinder immediately, allow the motor to stop and unplug the grinder. Identify the cause and remove the blockage.
Clean, check and perform maintenance work on the machine and guard devices regularly. Regularly clean the inside of the grinding wheels and belt grinder housing. The grinding wheels and sanding belt must be able to rotate freely within the housing.
Unplug when the grinder is not in use, before making any adjustments or carrying out modifications, repairs or maintenance.
Regularly check the power cable on the grinder and have it repaired by an approved expert if damaged. Regularly check extension cables and replace if damaged.
Check the grinder for possible damage: Before using the grinder, protective devices or slightly damaged components must be carefully checked to ensure they are operating perfectly and as intended. Check that moving parts are in perfect working order and do not jam and check whether parts are damaged. All parts must be correctly installed and fulfill all conditions necessary to ensure perfect operation of the grinder. Damaged protective devices and parts must be repaired or replaced according to specifications by an authorized specialist workshop.

Reducing dust exposure:

WARNING – Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to cause cancer, birth defects, or other reproductive harm. Some examples of these chemicals are:
– Lead from lead-based paints,
– Crystalline silica from bricks and cement and other masonry products, and
– Arsenic and chromium from chemically treated lumber.

Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well-ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles.
This also applies to dust from other materials such as some timber types (like oak or beech dust), metals, and asbestos. Other known diseases are e.g. allergic reactions, and respiratory diseases. Do not let dust enter the body.
Observe the relevant guidelines and national regulations for your material, staff, application, and place of application (e.g. occupational health and safety regulations, disposal).
Collect the particles generated at the source, and avoid deposits in the surrounding area.
Use suitable accessories for special work. In this way, fewer particles enter the environment in an uncontrolled manner.
Use a suitable extraction unit.
Reduce dust exposure with the following measures:
– do not direct the escaping particles and the exhaust air stream at yourself or nearby persons or on dust deposits,
– use an extraction unit and/or air purifiers,
– ensure good ventilation of the workplace and keep it clean using a vacuum cleaner. Sweeping or blowing stirs up dust.
– Vacuum or wash the protective clothing. Do not blow, beat or brush.

Overview

See pages 2 and page 3.

1 Safety guard cover
2 Clamping nut
3 Clamping flange
4 Sanding disc
5 Back flange
6 Dust extraction connection
7 Safety guard
8 Workpiece support
9Eye preservers
10 Spark deflector| 11 On/Off switch
12 Lever (sanding belt replacement)
13 Screws for securing the sanding belt cover
14 Rotary knob for adjusting the belt run
15 Arrow (direction of circulation of sanding belt)
16 Sanding belt cover
17 Screws for securing the water container
18 Water container
19 Rubber stopper
20 Handling points for transport

• depending on equipment/not in the scope of delivery
  ---|---

Initial Operation

6.1 Transport
During transport (20), the bench grinder must be lifted and carried from the handling points marked on page 3.

6.2 Power supply
Before plugging in, check that the rated mains voltage and mains frequency, as stated on the rating label, match with your power supply. The grinder complies with protection class I and must therefore only be connected to sockets earthed according to specifications.

Always install an RCD with a maximum trip current of 30 mA upstream.

DSD 200, DSD 250 (three-phase version):
Ensure that the grinding wheels have the correct direction of rotation (the correct direction of rotation is indicated by an arrow on the side safety guards).If a grinding wheel is rotating in the wrong direction plug the grinder. The plug comprises of two-phase conducting pins that are mounted on a rotating socket (phase changing switch). Use a Phillips screwdriver to rotate this socket.

6.3 Installing workpiece support
Install workpiece support (8) as shown in illustrations A, page 2.

6.4 Fitting spark deflector and eye preservers
Install the spark deflector (10) and eye preservers (9) as shown in illustrations B, page 2.

6.5 Installing machine safely
Place the machine on a stable workbench. Ensure that the machine is securely seated.
The machine can also be bolted down (screws not included in the scope of delivery). To do this, fasten the securing screws through the holes in the rubber feet.
If a stand or wall bracket is used (see Accessories chapter): bolt down the machine.

6.6 Dust extraction connection (depending on equipment)
If your machine is not equipped with a dust extraction connection (6), fit an extraction device that is suitable for double-wheeled bench grinders. The inner diameter of the extraction connection piece: 35 mm. Before switching on the machine, ensure that the extraction device is connected and being used correctly.

6.7 Test run
Check the grinding wheels before initial use.
Test run
A test run of approx. 5 min without load must be carried out before initial use. All persons must stay clear of the danger zone when this is performed.

 Use

7.1 Adjusting the workpiece support
Adjust the workpiece supports (8) frequently to compensate for wear of the grinding wheels (4).
The workpiece support must always be adjusted in such a way that the angle between the workpiece support and the tool is always greater than 85°.
The distance between the workpiece support and grinding material must be as small as possible and never greater than 2 mm (see illustration C, page 2).
If the grinding wheel is so badly worn that the maximum distance of 2 mm can no longer be maintained, the grinding wheel must be replaced.

7.2 Adjusting the spark deflector
Adjust the spark deflectors (10) regularly to compensate for wear on the grinding wheels (4). Release the 2 screws on the spark deflector and shift the spark deflector.
The distance between the spark deflector and grinding wheel must be as small as possible and never greater than 2 mm (see illustration C, page 2). If the grinding wheel is so badly worn that the maximum distance of 2 mm can no longer be maintained, the grinding wheel must be replaced.

7.3 Switching On and Off
Press the switch (11) (see illustrations D, page 2).
I =Switch on
0 =Switch off

DS 125, DS 150: Avoid inadvertent starts: always switch the grinder off when the plug is removed from the mains socket or if there has been a power cut.

Restart protection (not in DS 125, DS 150): When power is restored after a power failure, the machine – which is still switched on – will not start automatically for safety reasons. Switch the machine on and off again.

7.4 Dry grinding, belt sanding
– Stand in front of the grinder.
– Holding the workpiece with both hands, place the workpiece on the workpiece supports (8) and gently press it against the dry grinding wheel/ sanding belt. For optimum grinding/sanding results, move the workpiece gently to and fro. This also helps to distribute wear evenly on the grinding material.

7.5 Wet grinding (TNS 175 only)

Only use the wet grinding wheel for grinding when there is water in the water container. (18). Roughly 1/3 of the wet grinding wheel should be immersed in water. grinding results may be impaired if the water level is either too low or too high.
– Stand to the left of the grinder, in front of the wet grinding wheel.
– Holding the workpiece with both hands, lower it onto the wet grinding wheel. You can also support the workpiece on the levels on the water container (18) and then lower the workpiece onto the wet grinding wheel.

7.6 Adjusting the belt run (BS 175 only)
Unplug. Rotate the sanding belt manually. Use the rotary knob (14) to adjust the sanding belt so that it runs centrally on the sanding belt roller.

7.7 Setting the angle of the belt sanding arm (only BS 175) (see page 3 fig. E)
– Loosen the screw at the belt sanding arm
– Put the belt sanding arm in the desired position
– Tighten again the screw at the belt sanding arm

Maintenance, cleaning

Clean, check and perform maintenance work on the machine and guard devices regularly. Regularly clean the inside of the grinding wheels and beltgrinder housing. The grinding wheels and sanding elt must be able to rotate freely within the housing.
Disconnect the mains plug before starting any setting, cleaning, maintenance or repair work.

8.1 Grinding wheel change
Use only original Metabo grinding wheels.
The permissible rotational speed specified on the grinding wheel must be equal to or greater than the maximum idling speed specified on the identification plate of the machine.
Grinding wheel check: suspend the grinding wheel on a thread.
Knock lightly with a piece of hardwood. You will hear a clear tone if the grinding wheel is in perfect condition. If you hear a clattering, dull or hollow sound, the grinding wheel is damaged.
Do not use damaged grinding wheels.
Test run
A test run of approx. 5 min without load must be carried out after the grinding wheel has been changed. All persons must stay clear of the danger zone when this is performed.

Dry grinding wheel:
– Release the screws on the safety guard cover (1), twist and remove the cover (1) (bayonet catch).
– Hold the grinding wheel (4) firmly in position as shown. Caution! Risk of injury! Wear protective gloves!

– Remove adjusting nut (2) with an open-ended spanner.
Caution! Left-hand thread on the left machine side, i.e. to release the adjusting nut (2)on the left machine side, turn clockwise!
– Remove clamping flange (3) and grinding wheel (4).
– Secure new grinding wheel (4) in the reverse order.
– Remount the safety cover (1). Tighten screws.
– Adjust the spark deflector (10) and workpiece support (8) as described in chapters 7.2 and 7.1.

Replacing the wet grinding wheel (TNS 175 only):
– Empty the water container (18): hold a collecting pan under the container and remove the rubber stopper (19). Re-insert the rubber stopper.
– Loosen the 3 screws (17) adequately and lower the water container.
– Using one hand, hold the grinding wheel (4) secure. Caution! Risk of injury! Wear protective gloves!
– Remove the adjusting nut with an open-ended spanner. (Loosen by turning anti-clockwise).
– Remove clamping flange and grinding wheel (4).
– Secure new grinding wheel (4) in the reverse order.
– Replace the water container (18). (17) Tighten screws. Fill the water container with the correct amount of water (see chapter 7.5)

8.2 Replacing the sanding belt (BS 175 only)
Remove the side sanding belt cover (16): release the 2 screws (13), slide the sanding belt cover (16) (bayonet catch) and remove.
Swivel out lever (12) as far as it will go. This relieves sanding belt tension and it can now be removed from the rollers.
Place the new sanding belt on the rollers so that its direction of circulation (arrows on the inside of the sanding belt) matches the arrow (15) (16)on the side sanding belt cover.
Return the lever (12) to the original position to tension the sanding belt.
Place the side sanding belt cover (16) on the 2 screws (13) and slide (bayonet catch). Tighten the two screws.
Adjust the belt run (see chapter 7.6).
For sanding belts, see Accessories chapter 9.

8.3 Water container (TNS 175 only)
Regularly replace the water in the water container (18). To do this, hold a collecting pan under the container and remove the rubber stopper (19).
Dismantle the water container for cleaning purposes, as described in chapter 8.1. Use water and a brush (no metal bristles) to clean the inside of the container.

Accessories

Use only genuine Metabo accessories.
If you need any accessories, check with your dealer.
For dealers to select the correct accessory, they need to know the exact model designation of your power tool.

A Grinding wheels……………… Order No.:
D= 125 mm:
36 P: ………………0900025181
60 N: ………………0900025190
D= 150 mm:
36 P:…………………….6.30632
60 N:…………………….6.30633
D= 175 mm:
36 P: …………………….6.30657
60 N: …………………….6.30656
D= 200 mm:
36 P: …………………….6.30784
60 N: …………………….6.30785
D= 250 mm:
36 P: …………………….6.30636
60 N: …………………….6.30637
Wet grinding wheel
D= 200 mm: ………………0900025653
Staind
Order No.: ………………………. 6.23867
Wall bracket
Order no: ……………………6.23862
Descending belts

3 x P 40
3 x P 60
3 x P 80
3 x P 100
3 x P 120
3 x P 180
3 x P 240
3 x P 400| 0900025777
0900025688
0900025696
0900025785
0900025700
0900025807
0900025823
0900025840
---|---

For a complete range of accessories, see www.metabo.com or the main catalog.

Repairs

**** Repairs to electrical tools must be carried out by qualified electricians ONLY!
A defective mains cable must only be replaced with a special, original mains cable from Metabo, which is available only from the Metabo service.
If you have Metabo electrical tools that require repairs, please contact your Metabo service center.
For addresses see www.metabo.com.
You can download spare parts lists from www.metabo.com.

Environmental Protection

Metabo’s packaging can be 100% recycled.
Scrap power tools and accessories contain large amounts of valuable resources and plastics that can be recycled.
These instructions are printed on chlorine-free bleached paper.
Only for EU countries: Never dispose of power tools in your household waste! In accordance with European Guideline 2012/19/EU on used electronic and electric equipment and its implementation in national legal systems, used power tools must be collected separately and handed in for environmentally compatible recycling.

Technical Specifications

Explanatory notes on the specifications on page 4. Changes due to technological progress are reserved.

Dmin = minimal diameter of the sanding disc
Dmax = maximum diameter of the grinding wheel
D N, max = maximum diameter of the wet grinding wheel
d= Hole diameter of the grinding wheel
d N = Hole diameter of the wet grinding wheel
Bmax = maximum thickness of the sanding disc
A = Sanding belt (length x width)
n0 =Idle speed
v0 =Belt speed in idling
P1 = Nominal power input
P2 = Power output
MK =Breakdown torque
m=Weight
A-effective perceived sound levels:
LpA =Sound pressure level
LWA =Acoustic power level
LpA = Emission sound pressure level
K… = Uncertainty (sound level)

During operation, the noise level can exceed 80 dB(A).

Wear ear protectors!
Measured values determined in conformity with EN 62841.
~ Alternating current

Emission values
Using these values, you can estimate the emissions from this power tool and compare these with the values emitted by other power tools. The actual values may be higher or lower, depending on the particular application and the condition of the tool power tool. In estimating the values, you should also include work breaks and periods of low use. Based on the estimated emission values, specify protective measures for the user – for example, any organizational steps that must be put in place.

The device was tested with S2 (30 min).
The technical specifications quoted are subject to tolerances (in compliance with the relevant valid standards).

Metabowerke GmbH
Metabo-Allee 1
72622 Nuertingen Germany
www.metabo.com 

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