BOLTON TOOLS GK4235 Band Saws User Manual

BOLTON TOOLS GK4235 Band Saws

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Main components of sawing machine

Saw frame| base| Clamping

device

| Saw wheel| Electrical cabinet| Coolant tank| Operatic n station
---|---|---|---|---|---|---
Sub-colum n| Leading device| Oil pump| motor| reducer| Coolant pump| Main oil cylinder
Clamping cylinder| Working light| Driving wheel| Driven wheel|  |  |

seIection of teeth number of saw blade for variable stocks

Cutting length (inch)| Less 0.59| 0.59-0.98| 0.98-2.95| 2.95-5.91| 5.91-9.84
---|---|---|---|---|---
Teeth number| 12-10| 10-8| 8-6| 6-4| 4-3

Attention for usage of new saw blade selected

1. Before loading the new saw blade, keeping the cleaning of the saw blade wheel and checking the coolant and hydraulic system
2. Fine and coarse teeth saw blade should be applied according to size of stocks, please check the above item 3 to choose the suitable saw blade for your stock so that no any teeth of saw blade broken;
3. Cutting speed should be lower while cutting the material with quite high hardness
4. The saw blade selected also was considered as per the shape of the stock, teeth-change blade should be used for the profile stock, keep at least two tooth inside the stock constantly
5. Reasonable to choose coolant liquid for variable stock, oil and water ratio can be 1 :5 for high alloy steel and 1: 10 for low alloy steel and carbon steel

Installation methods for the saw blade

1. checking the saw blade and welding coupling before installation
2. up rise the saw frame and open the front cover, follow the marks instruction and rotating up the lead screw 5-7cm, and open the adjustment crews on the left and right
3. keep the new blade into the leading box and adjusting the nuts and clamping the blade gently as per the instruction, the clamping force of blade was normally about 25N.M
4. power on and off and make the blade rotating gradually till the saw blade into normal working
5.  keeping the machine into free working for 2 minutes for checking without any abnormal happened

Fixture stock

See the figure 1 for the clamping of variable stocks

Hydraulic system

The hydraulic system was used for:

1. up and down of saw frame
2. clamping and unclamping of stock
3. blade feeding speed, system pressure: 1.8-2Mpa,see below

Figure 2

•

| Gear pump| 1| 6 liter
3| YS712-4| Motor| 1| 0.55kw/1400rpm
4| P-8108| Overflow valve| 1|
5| DSG-02-3C2-24

V

| Electrical-magnetic valve(3 positions;4-way)| 1|
6| HDJ-10Y| Throttle Valves| 1|
7| 22C-10| Stroke valve (2 positions,2 way)| 1|
8| 340-10| Selector valve (3 positions,4 ways)| 1|

Electrical principle chart

(see Figure 3)

Operation and maintenance

1. checking the power source with correct wire connecting and keep the suitable coolant liquid and hydraulic oil
2. Idle running machine and assure the machine with right rotating direction and fluent coolant and moving of up and down
3. adjusting the stock stopper with right position of cutting length, and stock is in clamping status
4. keeping the stock bracket at suitable height
5. adjusting the up-valve and down-valve and make the saw blade 2cm higher than the stock, and changing the stroke quill and make sure that the stroke switch can be touched properly during up rising and cutting off of saw blade, cutting speed should be increased slowly while cutting into the stock
6. lubrication oil No.32 was applicable for the sliding parts, such as camping vise, main column, sub-column
7. Lubrication oil should be changed periodically
8. Any parts of the personal body should be away from the running blade
9. Overload operation will cause a hard damage to the machine
10. Blade changing should be operated after power off
11. Keep clean environment around the machine
12. Power off the main switch while stopping the machine and rise-up the bracing, opening the vise and saw blade

Usual major faults and solution

mechanical parts

the saw speed
2.split teeth or lower symmetry| Change new saw blade
3.far distance between leading bracket and stock| Adjust the distance less than 3cm
4.teeth wear out| Change saw blade
5. un-perpendicular between saw blade and vise| Adjust leading box
Saw        blade drop off| Low tension of saw blade| Tension the saw blade
Unbalance driven wheel and driving wheel| Adjust the tension nuts
Noise           of reducer box

(

| 1.bearing broken inside| Change bearing
2. abrasion inner hole with the shaft| Change the driving wheel
3.Wheel abrasion and reducer damage| Change the wheel
4. abrasion of warm bar and warm gear| Change the bar or gear
5.out of oil in the reducer box| Oil charging
No manual up rising            or

auto-rising of saw frame and

| 1.low pressure| Adjust the relief valve
2.oil route blocking or leaking| Clean or change the valve, filter,

bracing the joint

3.stroke switch out of service| Repair or change the switch
 | 4. wiring failure| Check the wire diagram
---|---|---
No descending or            even

descending of saw frame

| 1.speed-adjust valve blocking| Clean or change the valve
2.descending valve out of work| Check the oil route
3.High back-pressure| Adjust the pressure
 | 4. valve’s core locking inside| Clean the core of valve
---|---|---
5.un-vacuum oil cylinder| Discharge the air

electrical parts

No power supply and oil pump does not work once turning on the main switch| 1. power source no connecting| Connect the power QF1
2. short cut electricity| Repair or change the breaker
3.open the emergency stop button| Reset the stop button
Machine still work when pushing the stop button| Button broken| Change the button
Wiring failure| Check the wire diagram
machine does not

work     ‘ when pushing the start

button

| Button for saw blade broken| Repair or change the button
Wiring failure| Check the wire diagram
Stroke switch out of work| Repair or Change he switch
Machine still work after cutting off stock| Limit switch out of work| Repair or change the switch
Limit nut not in right position| Adjust the nut into right position
Indicator out of work| Transformer broken| Repair or change the transformer
Indicator broken| change the indicator

hydraulic parts

and exhaust

the air extremely

2. Oil leaking| Brace the coupling
3.seals leaking of oil pump shaft| Chang the sealing ring
4.oil return pipe above oil surface| Submerge the oil tube
5.oil pump wear out or broken| Chang the pump
Wrong           rotating direction of oil pump| Incorrect wiring connecting| Check the wire diagram
High oil temperature| 1. oil pump wear out or broken| Repair or change pump
2.low oil viscosity| Change oil into No.46
3.high oil pressure| Adjust the pressure
Saw     frame     auto| 1.over tolerance between the core of selector valve| Repair or change selector valve
descending at middle| and valve hole|
level| 2.sealing ring broken of oil cylinder| Repair or change the sealing
 |  | ring
 | 3.speed-adjusting valve open| Close the valve
.|  |

Precautions

1. please read the manual books carefully and get to know this machine before operating
2.  balancing the machine after installation
3. choosing the suitable oil according to the environment temperature
4. ground wiring should be wiring 50cm below the ground
5. voltages should be controlled at the range of ±10%, in case damaging the electrical components

packing list

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