CHESTER 812 Manuel utilisateur

812 Bandsaw

Instruction Manual

Chester UK Ltd

Clwyd Close, Hawarden Industrial Pk

Hawarden, Nr Chester

Flintshire. CH5 3PZ

Tel: 01244 531631

Email: sales@chesteruk.net

www.chesteruk.net

IMPORTANT

SAFETY FIRST

ALL MACHINES ARE DANGEROUS

1. Use the correct tool for the job at hand never make a machine do a job it was not designed

for.

2. Never force the tool in the machine it will do the quicker and safer at the correct rate.

3. Always use clamps or vices to secure work – your hand is not strong enough!

4. When changing tools or work pieces always disconnect the machine first.

5. Service the machine regularly; a correctly operating machine is a safer machine.

6. Always replace belt covers before starting the machine.

7. Understand the machine fully before operation and always read the manual.

8. Get to know the machines limitations and applications.

9. Ensure that the machine is securely bolted to the bench and that the bench is securely

bolted to the ground.

TAKE GREAT CARE WHEN OPERATING THIS MACHINE TO PROTECT

YOUR BODY

1. Always wear safety glasses – everyday glasses are not suitable.

2. Dust can be caused when machining certain materials, always wear a mask.

3. Make sure you are not wearing any loose clothing such as ties, rings, bracelets that may get

caught in the moving parts of the machine.

4. Keep a proper footing and balance whilst operating the machine.

5. Never leave cleaning rags, etc on or near the machine.

SAFETY FIRST

ELECTRICS

1. All electrical tools must be earthed.

2. Never use electrical tools in damp or wet environment.

3. Make sure the machine is in the off position before switching on at the mains.

4. Always immobilise the machine before servicing or setting up work in the machine.

5. Great care should be taken when using coolant fluid with machine tools.

6. Ensure the machine is correctly connected and a fuse of the proper rating is used.

CHILDREN

1. Keep children away from machines, if necessary fit safety locks to the machine and mains

switches.

2. Never use machinery whilst talking to visitors, always concentrate on the job in hand!

REMEMBER ALL MACHINES

ARE

DANGEROUS IF NOT

USED CORRECTLY!

CONTENTS

1. General Guidelines for Use..........................................................................................4

2. Specification..................................................................................................................7

3. Delivery & Installation..................................................................................................7

4. Minimum Space for Machine Operation.....................................................................8

5. Tooth Selection.............................................................................................................8

6. Bi-Metal Speeds & Feeds............................................................................................10

7. Telltale Chips...............................................................................................................11

8. Assembly.....................................................................................................................11

9. Operation....................................................................................................................12

10. Blade Guide Bearing Adjustment..............................................................................17

11. Trouble Shooting........................................................................................................18

12. Circuit Diagram...........................................................................................................19

13. Part Diagrams & Part List...........................................................................................21

GENERAL GUIDELINES FOR USE

As with all machinery there are certain hazards involved with the operation and use of the

bandsaw. Using the machine with respect and caution will considerably lessen the possibility

of person injury. However, if normal safety precautions are overlooked or ignored, personal

injury to the operator may result.

This machine was designed for certain applications only. We strongly recommend that the

machine is not modified, and / or used for any application other than which it was designed. If

you have any questions relative to its application do not use the machine, until you

have first been in contact with the supplier or manufacturer.

The bandsaw may not arrive with a power socket or plug. In the event of this happening,

please inform Chester UK on Tel: (01244) 531 631.

SAFETY RULES FOR ALL TOOLS

USER

1. Wear correct apparel

No loose clothing, gloves, rings, bracelets or other jewellery to get caught in moving

parts. Non-slip footwear is recommended. Wear protective hair covering to contain long

hair.

2. Always wear eye protection

Refer to ANSLZ87.1 standard for appropriate recommendations. Also use face and / or a

dust mask if the cutting operation is dusty.

3. Don’t overreach

Keep a proper footing and balance at all times.

4. Never stand on a tool

Serious injury could occur if the tool is tipped or if the cutting tool is accidentally

contacted.

5. Never leave the tool running unattended

Turn power off. Leave tool until it comes to a complete stop.

6. Drugs, alcohol and medication

Do not operate the tool while under the influence of drugs, alcohol or any medication.

7. Make sure the tool is disconnected from the power supply

While motor is being mounted, connected or reconnected.

8. Always

Keep hands and fingers away from the blade.

9. Stop

The machine before moving chips.

10.Shut-off

Power and clean the bandsaw and work area before leaving the machine.

USE OF THE MACHINE

1. Remove adjusting keys and wrenches

Form a habit of checking to see that keys and adjusting wrenches are removed from the

tool before turning it ‘on’.

2. Don’t force the tool

It will do the job better and be safer at the rate for which it was designed.

3. Use the right tool

Don’t force the tool or attachment to do a job for which it was not designed.

4. Secure work

Use clamps or a vice to hold work when practical. It’s safer than using your hands, and

frees both to operate the machine.

5. Maintain tools in top condition

Keep tools sharp and clean for the best and safest performance. Follow instructions for

lubricating and changing accessories.

6. Use recommended accessories

Consult Chester UK for recommended accessories. The use of improper accessories

may cause hazards.

7. Avoid accidental starting

Make sure the switch is in the ‘OFF’ position before plugging in power cord.

8. Direction of feed

Feed work into a blade or cutter against the direction of rotation of the blade or cutter

only.

9. Adjust and position

The blade guide arm before starting the cut.

10. Keep the blade guide arm tight

A loose blade guide arm will affect the sawing accuracy.

11. Make sure

The blade speed is set correctly for material being cut.

12. Check

For proper blade size and type.

13. Stop

The machine before putting material in the vice.

14. Always

Have stock firmly clamped in the vice before starting the cut.

15. Ground all tools

If the tool is equipped with a three-prong plug, it should be plugged into a three-hole

electrical receptacle. If an adapter is used to accommodate a two-prong receptacle, the

adapter plug must be attached to a known ground. Never remove the third prong.

ADJUSTMENT

Make all adjustments with the power off. When assembling follow the manuals

instructions, this will ensure correct instruction and a safe structure.

WORKING ENVIROMENT

1. Keep the work area clean

Cluttered areas and benches invite accidents.

2. Don’t use in a dangerous environment

Don’t use power tools in damp or wet locations, or expose to rain. Keep the work area

well lit.

3. Keep children etc at a safe distance.

All children etc should be kept at a safe distance from the work area.

4. Don’t

Install & use this machine in an explosive dangerous environment.

MAINTENANCE

1. Disconnect

Machine from the power source when making repairs.

2. Check damaged parts

Before further use of the tool, a guard or other part that is damaged should be carefully

checked to ensure that it would operate properly and perform its intended function

check for alignment of moving parts, binding of moving parts, breakage of parts,

mounting and any other conditions that may affect its operation. A guard or other part

that is damaged should be properly repaired or replaced.

3. Disconnect tools

Before servicing and when changing accessories such as blades bits, cutters, etc.

4. Make sure

That the blade tension and blade tracking are properly adjusted.

5. Re-check

Blade tension after the initial cut with a new blade.

6. To prolong the blade life

Release the blade tension at the end of each working day.

7. Check the coolant level daily

A low coolant level can cause foaming and a high blade temperature. Dirty or weak

coolant can clog the pump, cause a crooked cast, low cutting rate and permanent blade

failure. Dirty coolant can cause the growth of bacteria with ensuing skin irritation.

8. When cutting magnesium never

Use soluble oils or emulsion (oil-water mix) as water will greatly intensify any accidental

magnesium chip fire. See your industrial coolant supplier for specific coolant

recommendations when cutting magnesium.

9. To prevent

The corrosion of machined surfaces when a soluble is used as coolant, pay particular

attention to wiping dry the surfaces where fluid accumulates and does not evaporate

quickly, such as between the machine bed and vice.

SPECIFIED USAGE

The machine is used only for general metals cutting within the range of cutting capacity.

NOISE

A weighted sound pressure level: 80 dB.

SAFETY DEVICE

1. Interlock switch on pulley cover. As soon as the pulley cover is open, the machine

will come to a stop with the function of this switch. Do not remove this switch from

the machine for any reason, and check it’s function frequently.

2. Interlock switch on cutting area. As soon as the pulley cover is open, the machine

will come to a stop with the function of this switch. Do not remove this switch from

the machine for any reason, and check it’s function frequently.

SPECIFICATION

Motor

0.55KW (3/4HP), 1HP (Option)

Blade Size

19.05 x 0.8 x 2362 (Carbon Blade)

60Hz

(FPM)

98 164 246 328

121 197 265

Saw Blade

(MPM)

29 50 75 100

37 60 81

Speed

50Hz

(FPM)

81 135 203 270

101 164 220

(MPM)

24 41 61 82

31 50 67

Model No. Cutting Capacity

812

812N

812G

90º

Ο (mm)

200 (8")

 (mm)

178 x 305 (7" x 12")

Ο (mm)

127 (5")

45º

 (mm)

120 x 125

(4 3/4" x 4 7/8")

Dimension LxWxH (mm)

1235 x 430 x 1100

N.W. / G.W. (kgs)

110 / 130

120 / 145

145 / 170

Packing Measurement

LxHxW (mm)

1270 x 470 x 1140

DELIVERY & INSTALLATION

UNPACKING

1. Transport to the desired location before unpacking, use lifting a lifting jack (Fig. B).

2. Transport after unpacking; please use a heavy-duty fibre belt in order to lift the

machine.

FIG. B

TRANSPORT RECOMMENDATIONS

1. Tighten all locks before operating.

2. Always keep a proper footing & balance while moving the bandsaw.

3. Disconnect the power supply, and make sure the machine is properly grounded.

4. Check the blade making sure that it is running in a counter-clockwise direction

5. Keep the bandsaw out of direct sunlight, dust, wet or water.

INSTALLATION

1. The saw may be mounted on a work bench or stand using six bolts.

2. The rear end of the base must be mounted on the rear of the stand or bench to

permit the vertical operation for this bandsaw.

INSTALLATION STEPS FOR THE PLASTIC COVER

1. Open the plastic moulded belt cover. Inlay the left indentation to the bottom of the

pulley. If the gap is too small, loosen the fixing screws of the pulley, then, move the

pulley out slightly.

2. Turn the belt cover counter clockwise, set the indentation into the pulley. Then

adjust the pulley until correct.

3. Set the indentation completely into the pulley, and then adjust the pulley until level

with the surface. You can now fix all the related screws into place.

MINIMUM ROOM SPACE FOR MACHINE OPERATION

TOOTH SELECTION

For maximum cutting efficiency and lowest cost per cut, it is important to select the blade with

the right number of teeth per inch (TPI) for the material being cut. The material size and shape

dictate tooth selection.

You need to consider:

1. The width of the cut. That is, the distance in the cut that each tooth must travel from

the point it enters the work piece until it leaves the work piece, and

2. The shape of the work piece.

•Squares, Rectangles, Flats (Symbol:

∎

)

Locate the width of the cut on the chart (inches on the outer circle and millimetres on the

inner circle). Select the tooth pitch

TOOTH SELECTION

on the ring marked with the square shape which aligns with the width of cut.

EXAMPLE: 6” (150mm) square, use a 2/3 Vari-Tooth.

•Round Solids (Symbol: ●)

Locate the diameter of your work piece on the chart. Select the tooth pitch on the ring marked

with the round shape that aligns with the size of stock you are cutting.

EXAMPLE: 4” (100mm) round, use a ¾” Vari-Tooth.

•Tubing, Pipe, Structural (Symbol: O H

＾

)

Determine the average width of cut by dividing the area of the work piece by the distance the

saw blade must travel to finish the cut. Locate the average width of the cut on the chart, then,

select the tooth pitch on the ring marked with the tubing and structural shape. This aligns with

the average width that you are cutting.

EXAMPLE: 4” (100mm) outside diameter, 3” (75mm) inside diameter of the tubing.

4” (100mm) OD = 12.5 sq.in (79cm2)

-3” (75mm) ID = 7.0 sq.in. (44cm2)

Area = 5.5 sq.in. (35cm2)

5.5 sq.in. (35cm2) / 4” (100mm)

distance = 1.38 (35mm) average width

1.38” (35mm), use a 4/6 Vari-Tooth

Note: The band speed and cutting rate recommendations presented on this chart are

approximations and are meant to be used as a starting point for most applications. For exact

cutting parameters consult a saw blade supplier.

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