CHESTER 812 Instruction Manual
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CHESTER 812 Instruction Manual

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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

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  • Page 1 812 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...
  • Page 2 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.
  • Page 3 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.

  • Page 4: Table Of Contents

    CONTENTS General Guidelines for Use..................4 Specification........................7 Delivery & Installation....................7 Minimum Space for Machine Operation..............8 Tooth Selection......................8 Bi-Metal Speeds & Feeds....................10 Telltale Chips.......................11 Assembly........................11 Operation........................12 Blade Guide Bearing Adjustment................17 Trouble Shooting......................18 Circuit Diagram......................19 Part Diagrams & Part List...................21...

  • Page 5: General Guidelines For Use

    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.
  • Page 6 Keep tools sharp and clean for the best and safest performance. Follow instructions for lubricating and changing accessories. Use recommended accessories Consult Chester UK for recommended accessories. The use of improper accessories may cause hazards. Avoid accidental starting Make sure the switch is in the ‘OFF’ position before plugging in power cord.
  • Page 7 MAINTENANCE Disconnect Machine from the power source when making repairs. 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.

  • Page 8: Specification

    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) 75 100 Speed 50Hz (FPM) 81 135 203 270 101 164 220 (MPM) Model No.

  • Page 9: Minimum Space For Machine Operation

    INSTALLATION STEPS FOR THE PLASTIC COVER 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. Turn the belt cover counter clockwise, set the indentation into the pulley.
  • Page 10 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.

  • Page 11: Bi-Metal Speeds & Feeds

    BI-METAL SPEEDS AND FEEDS These figures are a guide to cutting 4” (100mm) material (with a 314 Vari-Tooth) when using a cutting fluid. Increase Band Speed: 15% When cutting ¼” (6.4mm) material (10/14 Vari-Tooth) 12% When cutting ¾” (19mm) material (6/10 Vari-Tooth) 10% When cutting 1-1/4”...

  • Page 12: Telltale Chips

    TELLTALE CHIPS Chips are the best indicator of correct feed force. Monitor the chip formation and adjust feed accordingly. Thin or powdered chips – increase the feed rate or reduce the band speed. Burned heavy chips – reduce the feed rate and / or band speed. Curly silvery and warm chips –...

  • Page 13: Operation

    Line up the belt and both pulleys (such that the belt is running parallel in the pulley grooves. Tighten the setscrews of both pulleys in this position. Place the belt into a pulley combination for a correct blade speed (see material cut. chart).
  • Page 14 MANUAL GEAR TYPE SPEED CHANGING Select the proper cutting speed according to the material of work-pieces, and use the blade selection chart. Turn the speed-changing handle, for the necessary speed. DO NOT change the speed during cutting. Alter the speed when the bandsaw is at a complete stop. Note: The oil of the gearbox is between 950cc ~ 1000cc.
  • Page 15 STARTING SAW Switch button function description (FOR CE ONLY) CAUTION: Never operate the bandsaw without the guards in position. Make sure the blade is not in contact with the work when the motor is started. Start the motor, allow the saw to reach full speed, then you can begin the cut by letting the head down slowly onto the work.
  • Page 16 CHANGING BLADE Raise the saw head to a vertical position and open the blade guards. Loosen the tension screw knob sufficiently to allow the saw blade to slip off the wheels. Install the new blade with teeth slanting toward the motor as follows: Place the blade in between each of the guide bearings.
  • Page 17 The position of the vice when tightened. The position of the vice when loosened (completely opened). The position of the vice when loosened (half opened). TRU-LOCK VICE SYSTEM INSTRUCTIONS To operate, follow the below instructions: Raise the arm 2” above the work piece, and then close the cylinder valve. Doing this will keep the arm stationary.

  • Page 18: Blade Guide Bearing Adjustment

    BLADE GUIDE BEARING ADJUSTMENT This is the most important adjustment on the saw. It is impossible to get satisfactory work from the saw if the blade guides are not properly adjusted. The blade guide bearings on your metal cutting band saw are adjusted and power tested with several test cuts before leaving the factory.

  • Page 19: Trouble Shooting

    TROUBLE SHOOTING Symptom Possible Causes Corrective Action 1. Material is loose in the vice. 1. Clamp work securely. Excessive Blade Damage 2. Incorrect speeds or feed. 2. Adjust the speed or feed. 3. Blade teeth spacing is too large. 3. Replace with a smaller TPI blade. 4.

  • Page 20: Circuit Diagram

    CIRCUIT DIAGRAM...

  • Page 22: Part Diagrams & Part List

    PART DIAGRAM 812...
  • Page 26 PART LIST 812 Code No. Part No. Description Specification Quantity 195016 Base 195006 Vice Table 181114 Vice Jaw Bracket (Front) W008 Washer 3/8" x 25 x t2 S012 Hex. Head Screw 3/8" x 1-1/2" S410 Hex. Socket Head Screw 3/8" x 1-1/2"L N001 Hex.
  • Page 27 Code No. Part No. Description Specification Quantity 192042A Support Rod 195027 Bushing W002 Washer 1/2" x 28 x t2 N016 1/2" 195003A Bracket S013 Hex. Head Screw 3/8" x 1-1/4" W013 Washer 3/8" x 20 x t2 S014 Hex. Head Screw 3/8"...
  • Page 28 Code No. Part No. Description Specification Quantity N007 Hex. Nut 5/16" W017 Washer 5/16" x 18 x t1.5 S504 Carriage Screw 5/16" x 3/4"L W019 Washer 5/8" x 40 x t3 ∮3 x 25L 181129 Wheel HP120 Cotter Pin 195022 Wheel Rod N007 Hex.
  • Page 29 Code No. Part No. Description Specification Quantity ∮4 x 22L 173-2 181209 Blade Wheel Shaft 173-3 HP013 181210 Sliding Plate 181211 Blade Tension Sliding Block S608 Hex. Socket Headless Screw 5/16" x 3/4"L S019 Hex. Head Screw 5/16" x 1-1/2"L W015 Washer 5/16"...
  • Page 30 Code No. Part No. Description Specification Quantity 195012S Eccertric Shaft Assembly 203-1 195012 Eccertric Shaft 203-2 CA608ZZ Bearing 608ZZ 203-3 HCS01 C-Retainer Ring 195011S Bearing Shaft Assembly 204-1 195011 Bearing Shaft 204-2 CA608ZZ Bearing 608ZZ 204-3 HCS01 C-Retainer Ring S013 Hex.
  • Page 31 Code No. Part No. Description Specification Quantity 245-12 181219-1 Transmission Wheel Shaft 245-13 HK025 6 x 6 x 20L 245-14 181246 Bearing Cover 245-15 S708 Cross Round Head Screw 3/16" x 3/8"L 181226 Spindle Pulley S604 Hex. Socket Headless Screw 1/4"...
  • Page 32 PART DIAGRAM 812N...
  • Page 36 PART LIST 812N Code No. Part No. Description Specification Quantity 195006B Base 195016B Stand Complete Assembly 181114 Vice Jaw Bracket (Front) W008 Washer 3/8" x 25 x t2 S012 Hex. Head Screw 3/8" x 1-1/2" S410 Hex. Socket Head Screw 3/8"...
  • Page 37 Code No. Part No. Description Specification Quantity 193058 Spring 192042A Support Rod 195027 Bushing W002 Washer 1/2" x 28 x t2 N016 1/2" S014 Hex. Head Screw 3/8" x 1-3/4"L N005 Hex. Nut 3/8" 195019 Filter S006 Hex. Head Screw 1/4"...
  • Page 38 Code No. Part No. Description Specification Quantity S010 Hex. Head Screw 3/8" x 1"L 195021A Kond W/Shaft 19039 Bushing 195001 Body Frame W204 Spring Washer 3/8" S013 Hex. Head Screw 3/8" x 1-14"L 181240 Switch Cut Off Tip W017 Washer 5/16"...
  • Page 39 Code No. Part No. Description Specification Quantity 190-4 W202 Spring Washer 1/4" 190-5 S404 Hex. Socket Head Screw 1/4" x 3/4"L 190-6 195013 Bearing Pin 190-7 CA608ZZ Bearing 190-8 N016 Hex. Nut 5/16"-24"UNF 190-9 N007 Spring Washer 5/16" 195012S Eccentric Shaft Assembly 191-1 195012 Eccentric Shaft...
  • Page 40 Code No. Part No. Description Specification Quantity N007 Hex Nut 5/16" 195032 Motor W016 Washer 5/16" x 23 x t2 N007 Hex. Nut 5/16" S604 Hex. Socket Headless Screw 14" x 3/8"L 181235B Motor Pulley K008 5 x 5 x 30L S201 Cross Socket Hex.
  • Page 41 PART DIAGRAM 812G...
  • Page 45 PART LIST 812G Code No. Part No. Description Specification Quantity 195006B Base 19501B Stand Complete Assembly 181114 Vice Jaw Bracket (Front) W008 Washer 3/8" x 25 x t2 S012 Hex. Head Screw 3/8" x 1-1/2" S410 Hex. Socket Head Screw 3/8"...
  • Page 46 Code No. Part No. Description Specification Quantity 193058 Spring 192042A Support Rod 195027 Bushing W002 Washer 1/2" x 28 x t2 N016 1/2" S014 Hex. Head Screw 3/8" x 1-3/4"L N005 Hex. Nut 3/8" 195019 Filter S009 Hex. Head Screw 1/4"...
  • Page 47 Code No. Part No. Description Specification Quantity S010 Hex. Head Screw 3/8" x 1"L 195012A Kond W/Shaft 195039 Bushing 195001 Body Frame W204 Spring Washer 3/8" S013 Hex. Head Screw 3/8" x 1-1/4"L 181240 Switch Cut Off Tip W017 Washer 5/16"...
  • Page 48 Code No. Part No. Description Specification Quantity 190-4 W202 Spring Washer 1/4" 190-5 S404 Hex. Socket Head Screw 1/4" x 3/4"L 190-6 195013 Bearing Pin 190-7 CA608ZZ Bearing 608ZZ 190-8 N016 Hex. Nut 5/16-24"UNF 190-9 N007 Spring Washer 5/16" 195012S Eccentric Shaft Assembly 191-1 195012...
  • Page 49 Code No. Part No. Description Specification Quantity Warning Mark 3149 Vent Plug M8 x P1.0 192302S Gear Box Set 909-1 192301 Gear Box 909-2 192302 Gear Box Cover ∮5 x 20L 909-3 HS230 Hex. Socket Head Screw M6 x 20L 909-4 HP018 909-5...
  • Page 50 Code No. Part No. Description Specification Quantity 912-4 HCS13 C-Retainer Ring 912-5 CA6205ZZ Bearing 6205ZZ 912-6 192317 Bushing 25 x 30 x 30 912-7 HCR06 C-Retainer Ring 912-8 HG021 Oil Seal TC25 x 52 x 9 912-9 181217-1 Bushing 45 x 51.6 x 17...

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