Rotabroach CM-330-C Pneumatic Magnetic Drilling Machine User Manual

Rotabroach CM-330-C Pneumatic Magnetic Drilling Machine

Product Information

• Model No: CM/330/C
• Manufacturer: Rotabroach Ltd
• Maximum hole cutting capacity in .2/.3C steel: 52mm dia., 52mm deep
• Arbor bore: 19.05mm dia. (3/4 dia.)
• Motor Unit: Atlas-Copco Motor
• Magnet: 700kgs
• Overall dimensions: Height (max. extended) 540mm, Width (inc. capstan) 185mm, Overall length (inc. guard and magnet handle) 370mm
• Nett weight: 16.3kgs
• Air supply required: min. 5.5 Bar (80 psi), max. 13 litres/sec 28 cu/ft/min
• Sound pressure level: 78 dB(A)
• 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

Product Usage Instructions

1. 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.
2. Always wear approved eye and ear protection when the equipment is in operation. Failure to do so may result in personal injury.
3. Disconnect from the pneumatic supply source when changing cutters or working on the machine. Ensure that the air supply is connected after positioning the machine.
4. Use the machine on materials that are more than 25mm thick to achieve maximum magnetic performance. If not possible, substitute material should be positioned under the magnet and workpiece 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.
5. 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.
6. Purge the motor with light lubricating oil after use.
7. Do not make any modifications to the machine as it will invalidate the guarantee.

EC DECLARATION OF CONFORNIITY

SPECIFICATION

ROTABROACH PNEUMATIC MAGNETIC DRILLING MACHINE

MODEL NO. CM/330/C – MICRO-AIR

• II 2GD c T6 II C T85°C

Maximum hole cutting capacity in .2/.3C steel 52mm dia., 52mm deep. Arbor bore 19.05mm dia. (3/4″ dia.)

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.

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

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.
• 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 maneuvering especially when working overhead.

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.

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.

MOUNTING OF CUTTERS

ALWAYS DISCONNECT THE MACHINE FROM THE 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 a hole in the shank of the cutter. Insert the shank of the cutter into the arbor ensuring alignment of two drive flats with socket screws RD4066. Tighten both screws securely using hexagon key RD4088.

REMEDIES FOR HOLE-MAKING PROBLEMS

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

not cutting, motor stops| 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

| 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

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.

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| RD33140
11| Fixed gib strip| RD33103| 49| Information plate| RD4362
12| Adjustable gib strip| RD33104| 54| Ball| RD45620
13| Gib support strip| RD33105| 53| Face plate| RD33116
14| Spirol pin| RA353| 55| Guard| RD33345
15| Bearing bracket spacer.| RD3324| 56| Guard Slide| 18Y3000
16| Thrust washer| RD4519| 60| Guard support| RD33344
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| RD43084| 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|  |  |

ATLAS-COPCO MOTOR

Three-stage gear unit – for A0030

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)

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 the adaptor, remove socket set screws RD4368 (item No 78) and arbor RD3384 (item No 73). Insert adaptor RD33025 onto end of the motor spindle and lock into position.

Chuck Kit.

• RD440 5/8” capacity chuck + key
• RD324 Chuck spacer

To fit the chuck, replace the existing chuck adaptor (as described above) and screw the chuck onto the adaptor.

WARRANTY STATEMENT

Rotabroach® warrants its machines to be free from faulty materials, or workmanship under normal use for a period of 12 months from the 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 environmental 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 the 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 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. ROTABROACH® RESERVE THE RIGHT TO MAKE IMPROVEMENTS AND MODIFICATIONS TO THE DESIGN WITHOUT PRIOR NOTICE.

References

• Homepage - Rotabroach
• Homepage - Rotabroach

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