RASOR GRT-MINI Use Manual

USE MANUAL

GRT-MINI

GRT-MINI

THREE-PHASE

CUTTING UNIT

2

EN

COMPANY

ACKNOWLEDGMENT

Dear Customer,
thank you for choosing a Rasor

®

Elettromeccanica S.r.l. product.

Rasor

®

has been a reference point in the field of cutting systems in the textile, clothing,
furniture, tailoring, sport, chemical, automotive, nautical and insulating material sectors for
years. Its production has been always synonymous with reliability attested by many of
satisfied customers.
Rasor

®

quality system supervises all the company activities in order to provide the Customer
with a service that meets its needs and expectations in terms of product quality, delivery
reliability and stock of finished products.

All the parts of the devices have been planned and produced to guarantee an optimum
performance. In order to keep the high quality level and the long reliabilty of the Rasor

®

products, it is recommended to use only original spare parts and to contact the head
office for any maintenance work.

Rasor®Elettromeccanica S.r.l. was established in Milan in 1946 by Luigi Spinelli. For more
than sixty years it has been producing automatic cutting systems, cutting units for textile
applications and electric and pneumatic cutters.

Initially considered as a point of reference for cutting systems in the
textile applications, the Rasor

®

products are nowadays widely used in
other fields: chemical, automotive, nautical and sport sectors and in
furniture manufacturing.
Nowadays Rasor

®

can rely on the professional continuity of two
generations, with the experience inherited from the promoting partner, with his passion
and dedication.
The main characteristic of Rasor

®

is that each working phase, starting from the manufacturing

of the product up to its packing and delivery is carried out in Rasor

®

premises by qualified
operators who have professionaly grown up following the spirit of the company and of its
founders. This ensures the high quality which Rasor

®

has always considered as essential
since the beginning of its activity.
Following the innovative spirit mentioned above, our company is constantly focused on the
improvement of the product quality, on the study and development of new materials and
technologies.

EN

3

1. GENERAL SAFETY RULES

This manual is an integral part of cutting unit GRT-MINI and must be carefully
read before using it since it gives important indications with regards to its safe
installation, use and maintenance. Keep it with care.

Before using cutting unit GRT-MINI, read carefully the following general safety
rules.

• PACKAGING.
After taking off the packaging make sure that the cutting unit is intact. In
caseofdoubtdonotuseitandcontactanauthorizedservicecentre.Donot
leave pieces of packaging (plastic bags, foam polystyrene, boxes, etc.) within
the reach of children or disabled persons since they are potential sources of
danger.

• AVOID DANGEROUS ENVIRONMENTS.
Prevent the cutting unit GRT-MINI components from coming in contact with
damp or wet surfaces.

•KEEPCHILDRENAWAY.
Unauthorized persons, in particular children, must be kept away from the
working area.

•FEEDCABLE.
Prevent the feed cable from coming in contact with hot objects, pointed
surfaces or sharp edges. Never pull the feed cable of the machine. It must
never be replaced by the user. If necessary contact professionally qualified
staff.

• KEEP THE WORKING AREA ALWAYS IN ORDER.
The workplace must always be kept in order and well lightened; liquids or oil
traces must not be present.

•ALWAYSUSECUTTINGUNITSGRT-MINIPROPERLY.
Use the cutting units only to carry out the works they have been designed
for; do not use them improperly.

• OBSERVE THE USE OF THE TOOLS.
Do not cut excessively thick materials and always check blade conditions.

• AVOID ACCIDENTAL STARTINGS.
Before connecting cutting unit GRT-MINI, make sure that everything is installed
properly.

• CLOTHING.
Do not use large clothes or accessories that might get stuck in the moving
parts.

• GOGGLES AND PROTECTIVE METAL MESH GLOVES.
Always use goggles, protective metal mesh gloves approved by Rasor

®

during

use and maintenance operations (according to UNI EN 388:2004 standard).

•SPAREPARTS.
During maintenance and replacement operations use only original spare parts.
Blade maintenance must be only performed by Rasor

®

technicians.

• INSTALLATION.
Any installation that is not in conformity with these
specifications could jeopardize your safety and cancels the
warranty.

4

EN

ALL RIGHTS ARE RESERVED ACCORDING TO THE

INTERNATIONAL COPYRIGHT CONVENTIONS,

The reproduction of any part of this manual, in any form, is forbidden without

the prior written authorization of Rasor

®

Elettromeccanica S.r.l.

The content of this guide can be modified without prior notice. Great care has

been taken in collecting and checking the documentation contained in this

manual to make it as complete and comprehensible as possible.

Nothing contained in this manual can be considered as a warranty, either

expressed or implied - including, not in a restrictive way, the suitability warranty

for any special purpose. Nothing contained in this manual can be interpreted as a

modification or confirmation of the terms of any purchase contract.

Rasor

®

Elettromeccanica S.r.l. machines have not been conceived to work in areas at risk of
explosionsandathighriskoffireandtheycannotcutwetordampmaterials.Moreover,they
cannot work in case of rain.
In case of damage or malfunction, cutting unit GRT-MINI must not be used until the Customer
Care Technical Service has repaired them.

The original configuration of the cutting unit must not be changed at all.
On receiving the machine make sure the supply corresponds to what has been ordered.
In case of non-compliance immediately inform Rasor

®

.

Also make sure the cutting unit has not been damaged during transport.

Customer Care Technical Service

WARNING

The installer and the maintenance man must know the content of this manual. Although
the main features of the machine described in this manual are not subject to change,

Rasor

®

Elettromeccanica S.r.l. reserves the right to modify the components, details

and accessories it deems necessary to improve the machine or to meet manufacturing
or commercial requirements at any time and without being obliged to update this
manual immediately.

Informative letter

For any information, please contact

®

ELETTROMECCANICAS.r.l.

Via V. Caldesi, 6; 20161, MILANO (MI) - ITALY

Tel: [phone]; Fax: [phone]

e-mail:

[e-mail]

web:

www.rasor-cutters.com

WARNING

RASOR

EN

5

2. TRANSPORT AND PACKING

The cutting unit is delivered in a cardboard box, inside which there are various options. The
code of the ordered product and its serial number are indicated outside the package (see
picture 1). The following accessories are contained in a bag inside the package:

1) Poligonal blade;

2) Butterfly wrench for blade nut disassembly;

3) Drift for blade disassembly.

3. PLATE DATA

The manufacturer's identification and Machinery Directive 2006/42/CE conformity plate (see
picture below) is located on the front part of the cutting unit.

The plate must not be removed at all, even if the machine is resold. Always refer to
the serial number written on the plate itself when contacting the manufacturer.

Several safety warnings are printed on a card which is applied to the cutting unit feeding
cable; such warnings must be strictly followed by everyone dealing with the machine. The

company is not to be held responsible for damage to property or accidents to
people which might occur if the above-mentioned warnings are not observed. In
such a case, the operator is the only person responsible.

1

Serial number

Year of production

Model

Electric data

2

2

1

3

GRT-MI NI

380-400

49

READ THE

INSTRUCTION

MANUAL

DO NOT

REMOVE

THE

SAFETY

DEVICES

HIGH

VOLTAGE

SHEARING

RISK

USE

METAL

GLOVES

USE

GOGGLES

6

EN

4. PRODUCT DESCRIPTION

The fixture described in this manual is a small cutting unit model GRT-MINI which can be
assembled on automatic machines (e.g. spreaders, computerized cutting) by means of
proper holes located in the motor support. GRT-MINI can operate continuously and it can
cut at various heights by means of multiple installation.
By cutting with the blade and the counterblade always in contact and thanks to the steel
upper quality of the blade supplied, GRT-MINI guarantees the clean separation without
frayings of the two borders of the cut material. The three-phase motor with extremely
compact dimensions and extreme reliability with 86 mm diameter blades, guarantees cuts
with thickness up to 2.5 cm. A sharpener assembled on the cutting unit head allows
whetting the blade at any moment without disassembling it. After carrying out this operation,
it is possible to start cutting again. A high power motor, perfectly balanced, with a high
number of revolutions and totally free of maintenance, reduces the vibrations to the minimum,
thus making the cutting unit complies with Italian Legislative Decree No. 187 dated 19/8/
2005, which adopts European Directive No. 2002/44/CE concerning the risks deriving from
mechanical vibrations.The mechanical parts are made of high resistance steel, bronze and aluminium
and require lubrication after several working hours.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

1 Connector block 8 Aluminium base

2 Mot o r co ver 9 Po ligo nal blad e

3 Cable gland 10 Spring locking t he thread

4Motorframe11 Greaser

5 Sharpening push bu t t o n 12 Fixed back pro t ect ion

6 Motor support 13 Hard metal counterblade

7 Movable front protection 14

Mo tor met al lo wer w it h

assembly h o les

Dev ice c ompone nts

EN

7

7. FIELD OF APPLICATION

6. NOISE LEVEL

NOTE

It is advisable for cutting unit GRT-MINI owners to verify the compliance with the standard
concerning safety of workers: Italian legislative decree N. 81/08.

The maximum acoustic pressure level emitted by cutting unit GRT-MINI is about 60 dB (A).
Noise tests have been carried out in compliance with Standard ISO 11202:2010.
The device noise levels, measured at different distances (without any sound wave filtering
system), vary in the extent of few db (A).

Cutting unit GRT-MINI has been designed, manufactured and assembled to cut any kind of
fabrics or materials, with the exception of metal, plastic or wood, by means of rotary poligonal
blades. This equipment must not work:

-inareaspronetoexplosions;

- in presence of fine dust or corrosive gases;

- on wet or damp materials;

- to cut plastic, metal and wooden materials.

It is forbidden to use cutting unit GRT-MINI for

purposes different from the above-

mentioned ones.

5. TECHNICAL FEATURES

The technical data are only indicative and they can be changed without notice

5sidebladeØ86mminHSSsteel

8sidebladeØ86mminHSSsteel

5 side blade Ø 86 mm, in H.S.S. steel

covered with T eflon

®

8sidebladeØ86mminHSSsteel

covered with T.I.N.

8 side blade Ø 86 mm, in H.S.S. steel

covered with T eflon

®

8sideblade Ø86mminintegralhard

meta l

86THSST F

86TMD

86THSST N

Features of the available blades

86PHSS

86THSS

86PHSSTF

86 mm with hard met al

counterblade

550 rev./min

about 25 mm

Three-phase-Asynchronous, 50 W

(IP65-CL F )

0.30 A

2650 g

3600 g

1.5 m

LUX 200

<2.5m/s

2

0~55°C

10 ~ 95% wit hout condensate

Cutting working depth

Motor power

Weight (with feeding cable)

GRT-MINI cutting unit features

Blade diameter

Blade speed

Max . absorption

Working tempe ratur e

Working humidity

Weig ht (with pack age)

Electric cable length

Minimum luminosity for working

operations

Vibration at the start up

8

EN

8. USE WARNINGS

We recommend following the indications below in order to always work in safety conditions.

 All the operations must be carried out complying strictly with the safety rules of the

country where the device is to be installed.

 It is STRICTLY FORBIDDEN to smoke during the installation or adjustment operations of

the cutting unit.

 The Customer undertakes to comply with and make his staff observe all the rules and

regulations in force concerning safety, prevention of accidents and health in the work
place. Therefore, the Customer assumes the responsibility to strictly follow all the rules and
regulations in force, as well as the special provisions in force in sport and public installations
the Customer declares to know after receiving all the relative necessary information.

 The cutting unit works also without its safety protective device. This protective

device must NEVER be removed.

 Always check the resistance of the material to be cut and the kind of blade which is being used.
 The Customer shall equip his own personnel with all the individual safety protections for

the execution of the works, as well as with the ones which might be prescribed by the
Manufacturer due to specific danger conditions of the plant or of the area where the
personnel must work.

 Do not make any adjustment while the blade is working or while the electric plug is

connected.

 Always pay attention to the electric cable position to prevent it from being cut or damaged

by the blade.

 It is allowed to assemble cutting unit GRT-MINI on machines O.E.M. on condition that their

original structure is not modified. Otherwise, the intervention must be certified by Rasor

®

.

Firstly make sure that the lines are able to feed the cutting unit correcltly, in compliance with
the safety rules

(for the feature required see par. 5

).

We suggest installing a magnetothermic safety device before the cutting unit and check
that the ground circuit is effective

. Before working on the feeding cable pull the plug out.
Check that electric connections and protections correspond to the driving force and the
plate data values

(voltage and current

), required by the different

electric circuits

. By referring to the CEI

11-27/1 standard all the works
carried out by means of electric current must be performed by a
staff, who has been provided with all the devices required by the
above-mentioned standard. For the works carried out under voltage,
it is necessary that the employer certifies the suitability,

against

formative processes

. The cutting unit GRT-MINI is supplied with electric

cable connected to the connector block located

beside the motor

.

The user must connect the cutting unit to the mains

(the ca

ble

complies with the

CEI 20-22 III Standard

). Never change the length

of the cable supplied

.Ifitisnecessary,use alongercableand

replace the one supplied

. To connect the new cable

open the

cover

“A”byunscrewingthe

4cross-slottedscrews

“B”(seepicture

3).

The minimum section of the connecting cables must be determined
by the operator in charge of the installation

. We recommend to use

safety cables and socket

IMQ approved

. Check the connection by

WARNING

3

9. ELECTRIC CONNECTION

B

B

A

EN

9

10. RESIDUAL RISKS

11. INSTALLATION AND USE

Even though the cutting unit is safe, operators must pay attention to preserve their and
other people’s safety.

 At the end of the working operations, the motor could be very hot.
 The cutting blade can work even when the protective device is disassembled.

To install and use the cutting unit manually, proceed as follows:

1) Fix the cutting unit on level squares or angles by means of four 5MA screws, by inserting
them in the four holes located in the motor lower cover (see pictures 4 and 5).

NOTE

The cutting unit can be installed in any position/angle: vertically, laterally and it can be turned
upside down. It is not compulsory for the Aluminium base to touch the machine table.

2) Lay the material to be cut;

3) Connect the cutting unit to the electric feeding;

4) Put the material on the cutting foot;

5) Adjust the front mobile protection according to the thickness of the material to be cut (see
picture 6);

6) Carry out the cutting operation.

NOTE

Cutting unit GRT-MINI can work in a fixed position (the material has to be moved) or it can
move forward while the material is kept in the same position. Make sure the material to be
cut is properly stretched, preventing it from curling.

4

WARNING
Never use the two bolts which fix the motor to the cutting part to fasten cutting

unit GRT-MINI. This operation may cause the motor shaft to break. In this case,
warranty is not valid.

5

enabling the cutting unit and verify the rotation direction.
The cutting unit is provided with earthing (yellow-green cause unsafe working conditions.
Possible damages are not at RASOR

®

s.r.l. charge.

The electric feeding must be supplied by a line protected against overcurrent by means of
the automatic switch (magnetothermal) or delayed fuses with a suitable dimensions. The
current of the safety devices must be as low as possible considering the max. absorption of
the machine (see identification plate).

6

WARNING

The operator must arrange a disconnetting switch on the supply line in order to switch off
the machine, if necessary.

10

EN

13. LUBRICATION

Every 3-4 working days it is necessary to lubricate the
pair of gears. To carry out this operation, remove the
protective plug “A” located on the motor support of the
cutting unit and fill it with lubricating grease Rasor. Screw
plug “A” again a few turns. Screw plug “A” a few turns
every 2-3 working days (see picture 9).

The blade must never be dirty with grease or oil.

9

WARNING

A

12. BLADE SHARPENING

After many hours of a continuative use of the cutting
unit, or if it would not be able to cut anymore, it is
necessary to sharp the blade.
To carry out this operation, start the blade and press
sharpener “2” located on it for 3-4 seconds (by pressing
push button “1”, as shown in picture 7).
Repeat the operation 2-3 times.

If the sharpening operation is not effective, check the
wear of emery grinding wheel “3” (see picture 8).
If grinding wheel “3” is too worn or dirty, replace it.

1

2

7

8

3

EN

11

If the blade is no more able to cut (even after repeating
the sharpening operation several times) it is necessary to
replace it. To carry out this operation, use butterfly
wrench “1” and drift “3” locking the blade (shown in
picture 10).

To replace the blade, proceed as follows:

1) Usesomeprotectiveglovesincompliancewith
Italian Legislative Decree 81/08;

2) Remove the fixed rear safety guard “A” (see picture

11) by unscrewing the cross-slotted screws “C”
by means of a screwdriver (not supplied by the
manufacturer) as shown in picture 12.
Remove the movable front safety guard “B” (see
picture 11) by unscrewing pin “D” and by removing
washer “E” as shown in picture 12.

3) Insert drift “3” into hole “F” (see picture 13), so
as to lock the blade (the hole on the blade must
correspond to the one on the structure).

4) Use butterfly wrench “1” to unscrew nut “G” and
remove blade “H” (see picture 13).

5) Replace the worn blade with the new one “2”,
being careful to center the blade on the shaft in
the correct position; we remind you to assemble
it so that the side with the writing Rasor can be
seen by the operator.

6) Assemble all the components again and carry out
the sharpening.

14. BLADE REPLACEMENT

2

1

10

3

11

A

B

E

F

H

1

G

13

D

C

3

12

12

EN

16. SPARE PARTS / EXPLODED VIEW

15. TROUBLESHOOTING

SOLUT ION

Check the distance between the blade and the counterblade

Check the kind of fabric
Sharpen the blade
Check the fabric thickness
Check the compatibility between blade and fabric
Make sure that the motor turns correctly
Reduce the feeding speed
Check the counterblade integrity
Carry out the lubrication

Disassemble the blade and remove the material residues
Check the wear of the pair of gears
Check the electric connections on the O.E.M. unit
Check the electric connections
Check the feeding cable

The cutting unit starts slowly, works

intermittently or it does not start

PROBLEM

The cutting unit is noisy

The fabric is not cut or it gets stuck between the

blade and the counterblade

CODE DESCRIPT ION CODE DESCRIPT ION CODE DESCRIPT ION CODE DESCRIPT ION

86PHSS

PENTAGONAL BLADE Ø 86 mm,
H.S.S. STEEL

GRT8617 MOTOR BEARING mm 6x19x6 SW1086CPL COMPLETE SHARPENER UNIT T105200 MOTOR SUPPORT FIXING BOLT

GMT866 0 MOT OR 3-PH 3 80 V 6 0 Hz GRT8618 MOTOR BEARING mm 10x 30x9 SW1 08700 EMER Y PIN T105 300 WA SHER

GMT866 0/480 MOTOR 3 -PH 480 V 60 Hz GRT 8619 COMPENSA TION RING SW1 08800 EMER Y SPR ING Ø 11 mm T105 600 ADJUST ING WAS HER

GRT101 800 WOR M SC REW GRT86M2 4 C OMPLETE MOTO R FRAM E SW108 900 S HARPENING BUSH T105 700 RING BEARING FIXING RING NUT

GRT1018CPL COMPLETE PAIR OF GEARS GTM8600 MOTOR 3-PH 380 V 50 Hz SW109000 SHARPENER SPRING Ø 6 mm T105800 GEAR RING BEARING

GRT 1059 CPL CO MPLET E GEAR RING S8 67401 S ALU MINIUM S IMPLE BA SE SW1 0910 0 S HARPE NING PUS H BUT TON T 1060 00 GEA R RING F IXING L EFT S CRE W

GRT10M18 MOTOR COVER S867401SCPL ALUMINIUM COMPLETE BASE SW109200

SHARPENINGPUSH BUT TON
FIXINGS CREW

T106100 SUBBLADE RING

GRT10M19 FAN S8676S SPRING WITH DOWEL SW109300 SHARPENING WASHER T106300 BLADE FIXING RING NUT

GRT10M21 UPPER MOTOR FLANGE S867900

SCREW FASTENING THE
COUNTERBLADE HOLDER

T101801 ELASTIC PIN T107000 BASE/SECTOR FIXING SCREW

GRT10M2 6 LOWER MOT OR FLANGE SW104 101 REAR GUARD FIXING SC REW T 104401 FRONT PRO TECT ION GUARD T10750 0

BLADE AS SEMBLING/
DISASSEMBLING WRENCH

GRT10M97

COMPLETE TERMINAL BOX
SUPPORT

SW 104102 OILER R ING T1044CPL FRONT PROT ECTION S ET T107 600 DRIFT LOCKING THE BLADE

GRT27 FLAME-R ETAR DANT FEEDING CABLE S W104103 OILER RING SP RING T 104500 FRONT GUARD FIXING S CREW T107 900 LUBRICAT ING GREASE

GRT8613 COMPLETE RO TOR SW10800 0 COUNTER BLADE HOLDER T 104501 CURV ED WAS HER T86 41M REAR P ROTECT ION GUARD

GRT8614 MOTOR F RAME SCRE W SW 108100 W IDIA COUNTERBLADE T 104700 GREAS ER CAP T864 1MCPL RE AR PRO TECT ION SET

GRT8615 SPACER SW 108200 C OUNTERBLADE FIXING S CREW T10480 0 GREASER T864 900 PLAT E LOCKING THE THREAD

GRT8616 FAS TENING DOWEL SW 108600 EM ERY GRINDING WHEEL T10 5000

FIXINGS CREW OF THE PLATE
LOC KING THE THR EAD

T8 6540 0 ANT I-F RICT ION BUS H

T865501CPL COMPLETEMOTOR SUPPORT

W ARRAN TY

Rasor®Elettromeccanica S.r.l. cutting unit has a 12 month warranty from the date indicated

on the last page of this manual, except in case of different written agreements.

The warranty covers all manufacturing and material defects. Replacement and repair operations

are covered only if carried out by our company and at our workshop. If in-warranty goods
need to be repaired, the customer must always send the complete machine to Rasor

®

.

Single units will not be repaired under warranty.

The material to be repaired must be sent CARRIAGE FREE.

Once the machine has been repaired, it will be sent CARRIAGE FORWARD to the customer.

The warranty covers neither technicians' intervention on site nor the cutting unit disassembly

from the installation place.

If, for practical reasons, one of our technicians is sent to the premises, the customer will be

charged the costs plus the travelling expenses.

The warranty does not include:

failure caused by wrong use or assembly,

failure caused by external agents,

failure caused by lack of maintenance or neglicence,

blades and parts subject to wear.

WARRANTY FORFEITURE:

In case of arrearage or other breaches of contract,

Whenever changes or repairs are carried out on our cutting units without our prior

authorization,

Whenever the serial number is tampered with or cancelled,

Whenever the damage is caused by improper use, bad treatment, bumps, falls and

other causes not due to normal working conditions,

Whenever the unit seems tampered with, dismantled or previously repaired by

unauthorized staff,

In case the cutting units are used for purposes that are different from the ones

described in this manual.

All repair operations carried out under warranty do not interrupt its duration.

All disputes will be settled in the court of justice of Milan (Italy).

We thank you in advance for the attention you will pay to this manual and we invite you to

inform us of any change you deem necessary to improve it and make it more complete.

RASOR ELETTROMECCANICA SRL

Via Vincenzo Caldesi 6
20161 Milan ∙ Italy
ph. [phone]
fax [phone]
[e-mail]

www.rasor-cutters.com

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