Rotabroach CM/330C Manual de usuario

Issue 9 Original Version December 2011

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: +44 (0) 114 2212 510 Fax: +44 (0) 114 2212 563

Email: [email protected] Web site: www.rotabroach.co.uk

Issue 9 Original Version December 2011

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

Issue 9 Original Version December 2011

[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

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

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.

Position

Off

Position

Issue 9 Original Version December 2011

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

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

[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

[8] PARTS LIST –CM/330/C

Item

Component

Part No.

Item

Component

Part No.

Motor packing

RD33117

M6 spring washer

RD4207

Magnet

RD43100

M6 socket head cap screw

RD4098

Motor

RD43105

Capstan arm

RD33089

Housing

RD33124

Plastic knob

RD43091

Slide

RD33125

M6 socket screw

RD4312

Motor Bracket

RD3357

Tension pin

RD4102

Rack

RD33097

Name plate

RD4301

Fixed gib strip

RD33103

Information plate

RD4362

Adjustable gib strip

RD33104

Screw

RD43092

Gib support strip

RD33105

Face plate

RD33116

Spirol pin

RA353

Guard

RD33120

Bearing bracket spacer.

RD3324

Guard bracket

RD33118

Thrust washer

RD4519

Spring plunger

RD43097

Bearing

RD4518

3/8" BSP elbow

RD43020

Arbor sleeve

RD33100

3/8" BSP ball valve

RD43021

Bearing bracket

RD33122

Silencer

RD4355

External circlip

RD43095

Hex adaptor

RD4389

Key

RD3355

Ratchet handle *

RD43104

M5 shakeproof washer

RD4092

M6 socket head cap screw

RD4156

M6 shakeproof washer

RD4096

M6 washer

RD33030

M6 socket head cap screw

RD4394

Button

RA354

M5 socket head cap screw

RD4325

Spring

RA355

M6 stud

RD4340

Arbor

RD3384

M4 shakeproof washer

RD4069

Circlip

RD4056

M4 pan head screw

RD4077

M8 socket screws

RD4066

M8 washer

RD4078

M5 countersunk screw

RD4347

M8 shakeproof washer

RD4079

M8 socket screws dog point

RD43135

M6 nut

RD4087

M12 grub screw

RD4081

M6 washer

RD4095

PG16 plastic insert

RD43138

M8 bolt

RD4319

Washer

RD43136

Capstan pinion shaft

RD33088

Pole piece set

RD43047

Pinion shaft sleeve

RD33090

Magnet Washer

RD33030

Bearing

RD33092

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