Charnwood W721 Operating instructions

12” BANDSAW
OPERATING INSTRUCTIONS
MODEL: W721
Charnwood, Cedar Court, Walker Road,
Bardon, Leicestershire, LE67 1TU
Tel. 01530 516 926 Fax. 01530 516 929
email; sales@charnwood.net website; www.charnwood.net
GENERAL SAFETY RULES
WARNING: Do not attempt to operate the machine until you have thoroughly read and
understood completely all instructions, rules, etc. contained in this manual. Failure to comply
may result in accidents involving fire, electric shock, or serious personal injury. Keep this
owner's manual and review frequently for continuous safe operation.
1. Know your machine. For your own safety, read the owner's manual carefully. Learn
its application and limitations, as well as specific potential hazards pertinent to this
machine.
2. Make sure all tools are properly earthed.
3. Keep guards in place and in working order. If a guard must be removed for
maintenance or cleaning, make sure it is properly replaced before using the machine
again.
4. Remove adjusting keys and spanners. Form a habit of checking to see that the keys
and adjusting spanners are removed from the machine before switched it on.
5. Keep your work area clean. Cluttered areas and workbenches increase the chance
of an accident.'
6. Do not use in dangerous environments. Do not use power tools in damp or wet
locations, or expose them to rain. Keep work areas well illuminated.
7. Keep children away. All visitors should be kept a safe distance
8. from the work area.
9. Make workshop childproof. Use padlocks, master switches and remove starter keys.
10. Do not force the machine. It will do the job better and be safer at the rate for which it
is designed.
11. Use the right tools. Do not force the machine or attachments to do a job for which
they are not designed. Contact the manufacturer or distributor if there is any
question about the machine's suitability for a particular task.
12. Wear proper apparel. Avoid loose clothing, gloves, ties, rings, bracelets, and
jewellery which could get caught in moving parts. Non-slip footwear is
recommended. Wear protective hair covering to contain long hair.
13. Always use safety glasses. Normal spectacles only have impact resistant lenses.
They are not safety glasses.
14. Do not over-reach. Keep proper footing and balance at all times.
15. Maintain the machine in good condition. Keep the machine clean for best and safest
performance. Follow instructions for lubrication and changing accessories.
16. Disconnect the machine from power source before servicing and when changing the
blade.
17. Never leave the machine running unattended. Turn the power off. Do not leave the
machine until it comes to a complete stop.
18. Do not use any power tools while under the effects of drugs, alcohol or medication.
19. Always wear a face or dust mask if operation creates a lot of dust and/or chips.
Always operate the tool in a well ventilated area and provide for proper dust removal.
Use a suitable dust extractor.
ADDITIONAL RULES FOR BAND SAWS
1. Ensure that the saw table is clear of off-cuts, tools or anything else that might foul the
work-piece.
2. When cutting long boards use one or more roller stand(s) to support the work or have
a competent helper to support it as it feeds off the rear of the table.
3. Always make sure that the blade is tracked and tensioned correctly before starting to
use the saw.
4. Always use a brush to clear the table of dust or debris. NEVER use your hands,
especially when the machine is running.
5. Always ensure that the thrust bearings and guide blocks are correctly adjusted before
using the saw.
6. ALWAYS USE A PUSH STICK WHEN IT IS NECESSARY TO PUSH ANY PIECE
OF MATERIAL OF SUCH SIZE THAT IT WOULD BRING YOUR HANDS WITHIN 30
CM OF THE BLADE.
7. Do not cut material that is badly warped or which has screws or nails in it.
8. Be extra vigilant when cutting stock which has loose knots in it as these my fly out of
the saw.
9. NEVER tilt the table when the saw is running.
10. To avoid exposure to hazardous dust, do not use this saw without connecting it to a
suitable dust extractor.
11. Always work with a sharp saw blade and feed the work at a rate suited to the
thickness and hardness of the material.
Note: This band saw has been designed and built solely as a woodworking machine. Do not
modify it in any way or use it for anything other than its designated purpose. Neither the
manufactures nor the supplier are liable for any damage or injury caused by incorrect
assembly, operation or electrical connection of this machine.
Specification
Table size
550 x 400 mm
Table height
1090 mm
Motor
750W
Blade length
2240 mm
Blade widths
6 to 19 mm
Blade speeds (no load)
360 and 720 m/min
Blade widths
6 to 12 mm
Maximum depth of cut at 90o
160 mm
Maximum depth of stock at 45o
89.4 mm
Throat capacity
305 mm
Dust extractor hose connection
100 mm
Weight
73kg nett
Dimensions (W x D x H)
800 x 630 x 1720 mm
Features
Precision ground, cast iron table with adjustable scale on rip fence carrier
0 to 45o table tilt
High Quality, British made blade
High blade speed for cutting most wood
Low blade speed for cutting very hard woods, plastic and metal (with a suitable blade)
Easily portable machine
Quick release, positive lock rip fence
Cross cut/mitre fence with easily read scale
Tool free blade tracking and tensioning
Unpacking
Cut the strapping, open the carton and remove
all parts from the packaging
Assembly
Building the stand
This is most easily accomplished on a bench or table
Leave all nuts and bolts finger tight until you
have finished assembling this stand. Start
with the long top rail and bolt it inside one
leg.
Add a short rail, making sure that it sits
above the long rail as viewed from the
underside, i.e. as you have it on the bench.
Continue until all four legs and rails are
joined.
Add the lower rails and feet.
Carefully align the parts until the stand is
square and ensure that the 4 large holes in
the top corners are lined up as you will need
to put bolts through these to fix the saw to
the base.
Fitting the Saw to the Stand
If you have someone to help you, the
easiest way to join the saw and the stand
is to lift the saw and lower it into place.
Secure it with the four countersunk
setscrews, washers and nuts provided.
Fixing bolts
Alternately;
If you have nobody to help, lower the saw
onto its back and bolt the stand to it.
After tightening the fixing bolts, lift the top
of the saw and pivot it on the rear feet
until it is upright and all four feet are on
the ground.
Screw the longest of the 6 mm hex headed
bolts into its hole as shown.
Place the table in position on the trunnion
and fix it with the four remaining 6 mm bolts.
Check to see if the blade is centred in the
slot. You will probably find that it is offset to
one side or the other.
This pointer is adjustable if the setscrew is
loosened. You may need to make a small
adjustment after the table is set
perpendicular to the blade.
If the table needs to be moved laterally to
centre the slot on the blade, loosen these
three screws, move the table to the correct
position and retighten the bolts.
Screw the four hex, wing bolts and washers
into the tapped holes on the underside of the
table and slide the rip fence carrier on to
them.
Adjust the two hex headed bolts so that the
carrier fits snugly to the table with no gap
between its upper edge and the table.
If you do not keep the carrier tight to the table
the rip fence will not be perpendicular to it.
Screw in and lock the push stick hanger.
Hang the push stick on it and remember that
this is one of the world’s best finger
preservers!
Locate the tension adjustment knob and
using a suitable tool, remove the cap.
Be careful not to lose the nut which is inside.
Place it over the spindle sticking out of the
top of the saw, screw on the nut and lock the
knob between the two nuts.
Replace the cap.
Fit the control handle to the spindle
protruding from the side of the saw. Rotate
the handle, so that the grubscrew tightens
onto the flat side on the spindle.
Tighten the grubscrew securely.
Apply a little tension to the blade and use a
set square to position the table at right
angles to it.
Lock it in position and if necessary, adjust the
level stop screw and the pointer so that it
aligns with the zero as shown earlier.
Setting up your saw
Quick blade tensioner (shown in tight
position). Looking from the front of saw, turn
the lever anticlockwise to slacken the
tension.
Blade guard positioner and lock
Tracking control and lock
After ensuring that the quick tension lever is
set in the tensioned position, adjust the blade
tension with the hand wheel on top of the
upper housing.
‘Pluck’ the back of the blade, as you would
the string of a double bass, at this
point. As the blade tension is increased, the
pitch of the sound will rise. Stop increasing
the tension as soon as the sound starts to
become dull. Alternatively, raise the blade
guard to its highest position and adjust
tension until the blade, at the midpoint
between table and guard can be deflected
only 3 to 5 mm with finger pressure.
Turn the upper wheel clockwise, by hand and
adjust the tracking control until the blade is
centred on the wheel, as shown in the inset
illustration. Lock the adjuster in this position.
The upper and lower thrust and guide
bearings should be set up next.
Thrust bearing
Guide bearing
Guide bearing locking screws
Thrust bearing locking screw
The thrust bearing should be about 0.5 mm
behind the back of the blade. Adjust it and
lock it place.
Slacken the guide bearing locking screws,
move the bearings in until they touch the
blade. Rotate the top wheel by hand a few
turns and lock the be\rings in place.
The lower thrust bearing and guide pins are
adjusted similarly.
Guide pin locking screw (on rear face)
Guide pin
Lower thrust bearing
Blade guard
Release the belt tension by turning the
tension control handle on the front of the
lower housing. Move the belt from the larger
pulley to the smaller one and then from the
smaller to the larger on the other pair.
Always have the drive belt on one large and
one small pulley.
This bandsaw is equipped with a cross
cut/mitre fence which can be fitted as shown.
The fence is equipped with adjustable stops
for 45° and 90° cuts.
The rip fence is reversible and may be used
on either side of the blade.
Your bandsaw is now ready for use but it is recommended that a suitable dust extractor is
connected before use.
Changing the Blade
Bandsaw blades are sharp enough to cause injury even when too blunt to cut wood! It is
recommended that protective gloves be worn when handling blades.
Unplug the bandsaw from the mains socket, slacken off the blade tension and open the
upper and lower housing doors. Although there are two micro-switches which will prevent
the saw from being started with a door open, disconnection is a good habit to develop.
Lower the blade guard
Remove the rip fence carrier
Slide the blade off upper and
lower wheels, bringing it out of
the machine via the slots in the
rear frame and the blade guard.
Reverse these steps to fit the new blade. Ensure that the teeth are at the front and pointing
down.
Position the blade between the guide bearings and pins. Tension and adjust the tracking as
done during the initial set up. Check and adjust, if necessary, the position of the bearings
and the guide pins.
22
54
55
51
56
53
23
24
25
21
18
28
29
64 37A 37B 37
W721 EXPLODED DIAGRAM
64
65
55
66
52
141
30
17
36
16
14 15
13
11 12
59 60 61 62
57
20
19
58
69
81
51
31
71
40
41
43
70
75
50
44 45
47
133
86
73
78
49
48
90
95
38
77
9
89
88
68
80
67
97
98
99
100
10
136
8
134
7
5
128
41 131 135 132
137
151
119
118
117
116
113
112
110
109
111
102
103
150
149
146
147
148
1
104
108
130
129
87
91
92
93
96
115
114
46
55
94
39
74
86
85
83
89
4
19 79
34 32 33
42
82
67
68
84
107 106 105
101
138
W721 Parts List
001 Lower door
003 Spacer bush
005 n/a
007 Spring plate
009 Pilot Pin
011 Circlip
013 Upper bearing bolt support
015 Hex. flanged nut
017 Shaft
019 Spring
021 Slider
023 Cover board
025 Guide carrier extrusion
027 n/a
029 Pinion shaft
031 Self tapping screw
033 Knurled screw
035 Cap head screw
037 Knurled nut
037B Bearing Shaft
039 Pilot shaft
041 Bearing
043 Brush
045 Flanged nut
047 Idler wheel
049 Sliding shaft
051 Cam
053 End cap
055 Thin hex nut
057 Blade tensioner bracket
059 Quick release shaft bearing
061 Thin nut
063 Thin nut
065 Setting knob
067 Hex head bolt
069 Wing nut
071 Washer
073 Locking knob
075 Adjusting knob
077 Lower bearing bolt
079 Knurled thumbscrew
081 Motor pulley
083 Nut
085 Shaft
087 Locking handle
089 Upper trunion
091 Pointer
002 Cap head bolt
004 Lock nut
006 Pilot guide
008 Rivet
010 Upper door
012 Upper bearing bolt
014 Nut
016 Guide plate
018 Split washer
020 Tension bracket frame
022 Self tapping screw
024 Rack
026 Plastic guide
028 Pinion
030 Bottom cap
032 Cap head screw
034 Bearing housing
036 Guide bearing
037A Grub Screw
038 Thrust bearing
040 Upper wheel
042 Coach bolt
044 spacer
046 Circlip
048 Bearing
050 NVR switch
052 Tapped flange
054 Setting knob
056 Threaded rod
058 Nut
060 Quick release shaft
062 Locking handle
064 Cap
066 Hex head bolt
068 Washer
070 Hex head bolt
072 Turn lock fastener
074 Washer
076 n/a
078 Dust extraction outlet
080 Guide pin housing
082 Motor
084 Hand wheel
086 Gearwheel
088 Spacer
090 Lower trunnion
092 Spacer
093 Screw
095 Table
097 Wing nut
099 Fence bracket
101 Fence
103 Fence carrier
105 Self tapping screw
107 Handle
109 Shaft
111 Cap head bolt
113 Rip fence carrier
115 Cover plate, left
117 Hand wheel
119 Belt tensioner shaft
121 Microswitch cover
123 Microswitch box
125 Lock washer
127 Blade guard
129 Belt
131 Cap head bolt
133 Spacer
135 Spring washer
137 Spring washer
139 Frame
141 Parallel pin
143 Spring
145 Push stick
146 Lock Insert
148 Lock washer
150 Lock Tongue
094 Coach bolt
096 Table insert
098 End cap
100 Coach bolt
102 Pressure plate
104 Plastic pressure plate
106 Cam
108 Cap
110 Pointer
112 Cover plate, right
114 Wing bolt
116 Handle
118 Setting collar
120 Screw
122 Microswitch
124 Nut
126 Self tapping screw
128 Tyre
130 Blade
132 Lower wheel
134 Pulley
136 Hex nut
138 Fixing plate
140 Scale
142 Table angle scale
144 Spacer
145 Hook
147 Lock Housing
149 Lock Nut