Rotabroach CM/330C User manual

Issue 9 Original Version December 2011
1
PNEUMATIC MAGNETIC DRILLING MACHINE
Model No. CM/330/C
II 2G T4 II C D110ºC
This machine (Serial No ) is CE approved.
Rotabroach Ltd
Imperial Works, Sheffield Road
Sheffield, South Yorkshire
United Kingdom
S9 2YL
Tel: [phone] Fax: [phone]
Email: [email protected] Web site: www.rotabroach.co.uk

Issue 9 Original Version December 2011
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CONTENTS OF THE MANUAL
[1]
Specification
Page 4
[2]
Safety measures
Page 5
[3]
Operating instructions
Page 6
[4]
Mounting of cutters
Page 7
[5]
Remedies for hole making problems
Page 7
[6]
Maintenance
Page 9
[7]
Component parts of complete machine
Page 10
[8]
Atlas-Copco Motor
Page 12
[9]
Optional Extras
Page 13
[10]
Warranty
Page 15
List of contents with drill unit
Check List
RD4329
Safety strap
YES/NO
RD4088
4mm A/F Tee handled hex key
YES/NO
RD4367
Pipe Adaptor Fixing Strap
YES/NO

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Issue 9 Original Version December 2011
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[1] SPECIFICATION
ROTABROACH PNEUMATIC MAGNETIC DRILLING MACHINE
MODEL NO. CM/330/C - MICRO-AIR
II 2G T4 II C D110ºC
Maximum hole cutting capacity in .2/.3C steel 52mm dia., 52mm deep.
Arbor bore 19.05mm dia. (3/4" dia.)
Motor Unit:
ATLAS COPCO LZB42 A0030
Speed 160 rpm
Magnet:
Manually operated
Tractive force at 20°C
(25mm minimum plate thickness)
The use on any material less than 25mm thick will progressively
reduce the magnetic performance. If possible substitute material
should be positioned under the magnet and work piece to
equate to a suitable material thickness. If this is not possible an
alternative secure method of restraining the machine MUST be
used. Failure to do so may result in personal injury.
700kgs
Overall
dimensions:
Height (max. extended)
Width (inc. capstan)
Overall length (inc. guard and magnet handle)
540mm
185mm
370mm
Nett weight:
16.3kgs
Air supply
required:
Pressure
Minimum volume:
5.5 Bar (80 psi)
min.
6.9 Bar (100 psi)
max.
13 litres/sec
28 cu/ft/min
Sound pressure level (Ear protectors must be worn)
Note: The figures quoted are emission levels and are not necessarily safe working
levels. Whilst there is a correlation between the emission and exposure levels, this
cannot be used reliably to determine whether or not further precautions are
required. Factors that influence the actual level of exposure of the workforce include
characteristics of the work room, the other sources of noise, etc. i.e. the number of
machines and other adjacent processes. Also the permissible exposure level can vary
from country to country. This information, however, will enable the user of the
machine to make a better evaluation of the hazard and risk.
78 dB(A)
3/8" B.S.P. Male Connection Point
Note: This machine contains aluminium, and should not be used in any environment
where the use of aluminium is prohibited, or may constitute a hazard, without the
specific approval of an authorised person.

Issue 9 Original Version December 2011
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An in-line filter and lubricator must be used prior to the drilling unit and at a distance not
greater than 5m. To achieve optimum service life and performance, lubrication should be
applied at a rate of 50 cubic mm. of oil for each cubic metre of air consumed.
Depending upon the type of supply fittings used, it may be necessary to vent the supply to
be able to disconnect the drill unit from the supply.
The motor should be purged with light lubricating oil after use.
NB: ANY MODIFICATIONS TO THIS MACHINE WILL INVALIDATE THE GUARANTEE
[2] SAFETY PROCEDURES
READ BEFORE USING THE MACHINE
Always secure the machine with the safety strap RD4329 before starting to operate - for the user's
protection in case the magnetic base breaks loose whilst in use. Failure to do so may result in personal injury.
Always wear approved eye and ear protection when the equipment is in operation. .Failure to do so may
result in personal injury.
Disconnect from pneumatic supply source when changing cutters or working on the machine. Ensure that the
Air supply is connected after positioning the machine.
Never pick the machine up by the cutter as this is sharp and may injure you.
Always ensure cutter retaining screws are secure.
Regularly clear the work area and machine of swarf and dirt, paying particular attention to the underside of
the magnet base.
With a gloved hand, and after switching off, remove any swarf, which might have gathered around the cutter
and arbor before proceeding with the next hole.
Before operating the machine, remove tie, rings, watches and any loose adornments, which might entangle
with the rotating machinery.
Ensure that the magnet is fully activated before attempting to cut a hole.
Should the cutter become ‘fast’ in the work piece, switch off the motor immediately to prevent personal injury.
Disconnect from the pneumatic supply and turn arbor to and fro. Do not attempt to free the cutter by
switching the motor on and off.
If the machine is accidentally dropped, always thoroughly examine the machine for signs of damage and check
that it functions correctly before trying to drill a hole.
Regularly inspect the machine and check that all nuts and screws are tight.

Issue 9 Original Version December 2011
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Cutting tools may shatter always extended the guard over the cutter during the drilling operation. Failure to
do so may result in personal injury. When moving the machine ensure the guard is over the cutter failure to do
so may cause injury.
On completion of the cut, a slug will be ejected. DO NOT operate the machine if the ejected slug may cause
injury.
Ensure an adequate supply of coolant is supplied to the cutter during the cutting cycle.
Manual handling
When moving the machine always ensure that you use the carry handle on the machine failure to do so may
cause damage to the machine. Never pick the machine up by the cutter as this may cause injury.
Caution this machine is heavy and may require help manoeuvring especially when working
overhead.
[3] OPERATING INSTRUCTIONS
Before connecting the pneumatic supply ensure the motor switch is in the OFF position.
Locate the machine in the required position for cutting the hole and activate the magnet by means of the
ratchet handle (clockwise viewed from rear). Ensure that magnet rod is fully screwed home.
Keep the inside of the cutter clear of swarf - it restricts the operating depth of the cutter.
Apply the cutting fluid to the reservoir via the inducement slots in the arbor. It is then «metered» out by the
pilot and is applied directly to the cutting edge. (Alternatively, fluid can be applied directly on to the work
piece making certain that it floods into the groove formed by the cutter.)
Depress the pilot to ensure cutting fluid is being correctly metered.
Start the motor by turning the rotary valve to ON position see below
Apply light pressure when commencing to cut a hole until the cutter is introduced into the work surface.
Pressure can then be increased sufficiently to load the motor. Excessive pressure is undesirable when using the
Rotabroach Micro-Air machine, it does not increase the speed of penetration and may cause the motor to stall.
The motor will restart when the excessive pressure is released.
Always ensure that the slug has been ejected from the previous hole before commencing to cut the next.
If the slug sticks in the cutter, move the machine to a flat surface, switch on the magnet and gently bring the
cutter down to make contact with the surface. This will usually straighten a cocked slug and allow it to eject
normally.
On
Position
Off
Position

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Apply a small amount of light oil lubricant regularly to slide and arbor support bearing. Cutter breakage is
usually caused by insecure anchorage, a loosely fitting slide or a worn bearing in the arbor support.
[4] MOUNTING OF CUTTERS
The following procedure is to be used when mounting cutters.
ALWAYS DISCONNECT MACHINE FROM PNEUMATIC SUPPLY
Lay the machine on its side with feed handles uppermost, ensuring arbor is wound down to its lowest point to
enable access to socket screws RD4066. Take the appropriate pilot and place through hole in shank of cutter.
Insert shank of cutter into arbor ensuring alignment of two drive flats with socket screws RD4066. Tighten both
screws securely using hexagon key RD4088.
[5] REMEDIES FOR HOLE MAKING PROBLEMS
Problem
Cause
Remedy
Magnetic base won't hold
effectively
Material being cut may be too thin for
efficient holding
Swarf or dirt under magnet
Irregularity on contact between
magnet and work piece
Attach an additional piece of metal
under work piece where magnet will be
located, or mechanically clamp magnetic
base to work piece
Clean magnet
Use extreme care, file only imperfections
flush on to surface
Hole not cut at intended
centre of cut
Magnetic base is not holding
effectively
Worn arbor bushing and/or ejector
collar
Too much feed pressure at start of cut
Cutter is dull, worn, chipped or
incorrectly sharpened
Worn or bent pilot, worn pilot hole
Loose bolts on motor bushing support
bracket, main casting or loose gib
adjusting set screws
See causes and remedies above
Replace! Only a few thousandths wear
permissible. New arbor bushing is
needed
Light pressure until a groove is cut. The
groove then serves as a stabilizer
Replace or re-sharpen. Sharpening
service is available
Replace part or parts
Adjust where necessary


Issue 9 Original Version December 2011
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Poor hole quality, cutter
not cutting, motor stops
Incorrectly re-sharpened, worn or
chipped cutter
Coming down on swarf lying on surface
of work piece
Insufficient air pressure/volume
Gibs out of adjustment or lack of
lubrication
Swarf accumulated (packed) inside
cutter
Re-sharpen or replace
Take care not to start a cut on swarf
Check air supply
Adjust set screws
Clear cutter
Problem
Cause
Remedy
Excessive cutter breakage
Steel swarf or dirt under cutter
Incorrectly re-sharpened or worn
cutter
Cutter skipping
Slideway needs adjustment
Cutter not attached tightly to arbor
Insufficient use of cutting oil or
unsuitable type of oil
Remove cutter, clean part thoroughly
and replace
Always have a new cutter on hand to
refer to for correct tooth geometry,
along with instruction sheet
See cause and remedy above
Adjust gibs
Retighten
Inject oil of light viscosity into he slot in
the arbor and check to be sure oil is
being metered into cutter when pilot is
depressed. If not, check pilot groove
and arbor internally for dirt or apply oil
externally. Even a small amount of oil is
very effective
Excessive cutter wear
See cause and remedy above
Incorrectly re-sharpened cutter
Insufficient or spasmodic cutting
pressure
Refer to instructions and a new cutter
for proper tooth geometry
Use sufficient steady pressure to slow
the drill down. This will result in
optimum cutting speed and chip load
Motor will not start
Insufficient air pressure/volume
Check air supply, spindle free to rotate

Issue 9 Original Version December 2011
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[7] MAINTENANCE
To be conducted only by authorised personnel
In order to ensure that the unit is used to its full efficiency there are a few basic maintenance needs to
observe. A regular check out of the machine will also ensure a prolonged «life» for the cutters and easier
operation.
Before proceeding with any maintenance work be certain that the pneumatic supply is disconnected
ADJUSTMENT OF SLIDE AND ARBOR SUPPORT BRACKET
An essential requirement of the machine is that the slide which controls the movement of the cutter, can move
in a smooth and controlled manner, free of lateral movement and vibration.
This situation can be maintained by periodic adjustment of the slide and is accomplished in the following
manner:
Place the machine in a vertical position and, by means of the capstan, raise the slide to its highest
position, thus exposing the maximum possible amount of the vee slideway. Clean the slideways
thoroughly and apply a small amount of light machine oil to the wear surfaces.
Now drop the slide to its lowest position within the main housing and loosen screws, thus allowing
free movement of the arbor support bracket.
With the hexagonal key located and commencing with the two inner screws, gently feed in all the
screws until slight resistance is encountered.
Operate the slide up and down a few times to test the movement and make any further necessary
adjustments. Try to ensure that all the screws are exerting a uniform pressure on the slide from top
to bottom.
A perfectly adjusted slide will operate freely up and down without any sideways movement.
Now, using fingers only, tighten the screws holding the arbor support bracket.
Place the machine on a steel plate, connect to supply and activate the magnet. Start up the motor. If
the arbor is incorrectly aligned, the arbor support bracket will be seen to oscillate. Many any
necessary further adjustments to the bracket to ensure correct alignment of the spindle and finally
tighten the screws using a hex key.

Issue 9 Original Version December 2011
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[8] PARTS LIST –CM/330/C
Item
Component
Part No.
Item
Component
Part No.
1
Motor packing
RD33117
42
M6 spring washer
RD4207
2
Magnet
RD43100
43
M6 socket head cap screw
RD4098
4
Motor
RD43105
44
Capstan arm
RD33089
6
Housing
RD33124
45
Plastic knob
RD43091
8
Slide
RD33125
46
M6 socket screw
RD4312
9
Motor Bracket
RD3357
47
Tension pin
RD4102
10
Rack
RD33097
48
Name plate
RD4301
11
Fixed gib strip
RD33103
49
Information plate
RD4362
12
Adjustable gib strip
RD33104
54
Screw
RD43092
13
Gib support strip
RD33105
53
Face plate
RD33116
14
Spirol pin
RA353
55
Guard
RD33120
15
Bearing bracket spacer.
RD3324
56
Guard bracket
RD33118
16
Thrust washer
RD4519
60
Spring plunger
RD43097
17
Bearing
RD4518
62
3/8" BSP elbow
RD43020
18
Arbor sleeve
RD33100
63
3/8" BSP ball valve
RD43021
19
Bearing bracket
RD33122
64
Silencer
RD4355
20
External circlip
RD43095
65
Hex adaptor
RD4389
21
Key
RD3355
66
Ratchet handle *
RD43104
22
M5 shakeproof washer
RD4092
67
M6 socket head cap screw
RD4156
23
M6 shakeproof washer
RD4096
68
M6 washer
RD33030
24
M6 socket head cap screw
RD4394
71
Button
RA354
25
M5 socket head cap screw
RD4325
72
Spring
RA355
26
M6 stud
RD4340
73
Arbor
RD3384
27
M4 shakeproof washer
RD4069
74
Circlip
RD4056
28
M4 pan head screw
RD4077
75
M8 socket screws
RD4066
29
M8 washer
RD4078
77
M5 countersunk screw
RD4347
30
M8 shakeproof washer
RD4079
78
M8 socket screws dog point
RD43135
31
M6 nut
RD4087
79
M12 grub screw
RD4081
32
M6 washer
RD4095
80
PG16 plastic insert
RD43138
35
M8 bolt
RD4319
81
Washer
RD43136
39
Capstan pinion shaft
RD33088
82
Pole piece set
RD43047
40
Pinion shaft sleeve
RD33090
83
Magnet Washer
RD33030
41
Bearing
RD33092
81

Issue 9 Original Version December 2011
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Issue 9 Original Version December 2011
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[9] ATLAS-COPCO MOTOR
Three-stage gear unit - for A0030
-
Ref No.
Part No
Qty
Description
39 (40-42)
40
41
42
43
44
45
46
47
48 (49-50)
49
50
67
68
69
113(114-120)
114
117
118
119
120
121
122
123 (124-127)
124
125
126
127
128
129
96 (97-98)
97
98
106
107
111
112
4430 0563 80
-
4090 0704 00
0335 3508 01
4430 0559 00
0666 8003 05
0337 2622 00
0502 3304 00
4430 0562 00
4430 0492 80
-
4090 0588 00
4430 0554 00
4170 0505 00
0663 9026 00
4430 0547 80
-
4210 2214 00
0517 0100 05
4210 2213 00
4210 2215 00
0502 1504 00
4210 2220 00
4430 0549 80
-
4430 0467 00
0515 1103 01
0517 0100 11
0502 1103 00
4430 0557 00
4430 0484 80
-
0517 0100 13
0515 0100 13
4430 0475 00
4430 0556 00
4430 0474 00
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
48
6
3
1
1
1
1
3
3
3
1
1
1
1
3
3
3
1
1
Gear rim complete
Gear rim (z = 47)
Lubricating nipple
Circlip (SB45)
Front part
Seal ring (G30 x 37 x 4)
Key (R6 x 6 x 30)
Ball bearing (6304-Z)
Nut
Gear rim complete
Gear rim (z = 45)
Circlip (BR35)
Washer
Cup spring
O Ring (40 x 1.78)
Planetary gear complete (i = 4.62)
Planet shaft (Ø19mm)
Gear wheel (z = 15)
Bearing needle (1.5 x 13.8)
Washer (6.3/9.1 x 0.5)
Axle pin (6.22h6 x 23.5)
Ball bearing (16004)
Bushing
Planetary gear complete (i = 4.46)
Planet shaft (z = 13)
Gear wheel (z = 15)
Needle bearing (K5 x 8 x 10 TN)
Bearing roller (NRB 5.0 x 19.8)
Ball bearing (6003)
Washer
Planet shaft complete (i = 3.25)
Planet shaft (z = 13)
Bearing roller (NRB 3.0 x 17.8)
Needle bearing (K3 x 5 x 9 TN)
Gear wheel (z = 12)
Washer
Gear wheel (z = 11/20)

Issue 9 Original Version December 2011
[10] OPTIONAL EXTRAS
ROTABROACH CUTTING FLUID
Specially formulated for maximum cutter life.
Available in three sizes:
1 litre RD208
5 litre RD229
Chuck adaptor.
RD33025
Enables the existing arbor to be replaced to utilize twist drill chucks.
To fit adaptor, remove socket set screws RD4368 (item No 78) and arbour RD3384 (item No 73).
Insert adaptor RD33025 onto end of motor spindle and lock into position.
Chuck Kit.
RD4189 1/2” capacity chuck + key
RD4190 Chuck key
RD324 Chuck spacer
To fit chuck, replace existing chuck adaptor (as described above) and screw chuck onto adaptor.
13

Issue 9 Original Version December 2011
NOTES:
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5

Issue 9 Original Version December 2011
WARRANTY STATEMENT
Rotabroach® warrants its machines to be free from faulty materials, or workmanship under normal use for a
period of 12 months from initial date of purchase and 90 days for all other parts (excluding cutters),
provided that the warranty registration card (or online registration) has been completed and returned to
Rotabroach®, or its designated distributor within a period of (30) days from the purchase date, failure to do
so will void the warranty. If the stated is adhered to Rotabroach® will repair or replace (at its option)
without charge any faulty items returned.
This Warranty does not cover:
1. Components that are subject to natural wear and tear caused by the use in accordance with the
operators instructions
2. Defects in the tool caused by non-compliance with the operating instructions, improper use, abnormal
environment conditions, inappropriate operating conditions overload or insufficient servicing or
maintenance.
3. Defects caused by using accessories, components or spare parts other than original Rotabroach® parts.
4. Tools to which changes or additions have been made.
5. Electrical components are subject to manufacturer’s warranty.
Your online registration can be submitted on www.rotabroach.co.uk
The warranty claim must be lodged within the warranty period. This requires the submission or sending of
the complete tool in question with the original sales receipt which must indicate the purchase date of the
product. A complaint form must also be submitted prior to the return.
This can be found online at www.rotabroach.co.uk Failure to complete this form will result in the delay of
your claim.
All goods returned defective must be returned pre-paid to Rotabroach®, in no event shall Rotabroach® be
liable for subsequent direct, or indirect loss or damage.
THIS WARRANTY IS IN LIEU OF ANY OTHER WARRANTY, (EXPRESSED OR IMPLIED) INCLUDING ANY
WARRANTY OF MECHANTABLITY OR FITNESS FOR A PARTICULAR PURPOSE. ROTABROACH® RESERVE THE
RIGHT TO MAKE IMPROVEMENTS AND MODIFICATIONS TO DESIGN WITHOUT PRIOR NOTICE
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