Rohm FORTO-HT 37/70 Operational manual

Translation of the Original Operating Manual
Cylinder with through-hole FORTO-HT
Version 1.0 • 03.05.2022
Store for reference
ID: XX.XXX
EN

Table of Contents
FORTO-HT EN III
Table of Contents
1 About this operating manual ..................................................................... 6
1.1 Manufacturer Details................................................................................. 6
1.2 Copyright ................................................................................................. 6
1.3 Liability and Warranty ............................................................................... 7
1.4 Conventions of Presentation .....................................................................8
1.4.1 Text Display........................................................................................8
1.4.2 Display of Safety and Warning Instructions .........................................9
1.5 Definitions .............................................................................................. 10
1.5.1 Manufacturer of the machine ............................................................ 10
1.5.2 Manufacturer .................................................................................... 10
1.5.3 Operator ........................................................................................... 10
1.5.4 Assembly information for holding screws .......................................... 10
1.5.5 Dial gage symbol .............................................................................. 11
1.5.6 Piston positions front and back......................................................... 11
2 Safety ....................................................................................................... 12
2.1 Intended Use .......................................................................................... 12
2.2 Improper use .......................................................................................... 12
2.3 Obligations of the operator ..................................................................... 12
2.3.1 General............................................................................................. 12
2.3.2 Rotation............................................................................................ 13
2.3.3 Installation/replacement/conversion/change ..................................... 13
2.4 Qualification of Operating and Specialist Personnel ................................ 15
2.5 Personal protective equipment ............................................................... 15
2.6 General hazards ..................................................................................... 16
2.6.1 Skin irritation due to operating materials...........................................16
2.6.2 Risk of injury due to handling heavy loads ........................................16
2.6.3 Risk of burns due to hot surfaces .....................................................17
2.6.4 Danger of crushing due to moving control disc ................................. 18
2.6.5 Risk of entrapment/crushing on the hollow clamping cylinder ........... 19
2.6.6 Risk of ejection, detachment and falling of components at the hollow
clamping cylinder .............................................................................20
2.6.7 Risk of ejection, detachment and falling of workpieces .....................20
2.7 Miscellaneous......................................................................................... 21
2.7.1 Procedure in the Event of Danger and Accidents ..............................21
2.7.2 Eyebolts for transport of hollow clamping cylinder ............................ 21
2.7.3 Modification of the hollow clamping cylinder..................................... 21
2.7.4 Dismantling the hollow clamping cylinder.......................................... 21
2.7.5 Collision/falling ................................................................................. 21

Table of Contents
IV FORTO-HT EN
3 Product description ................................................................................. 22
3.1 About this hollow clamping cylinder........................................................ 22
3.2 Options .................................................................................................. 25
3.3 Technical data ........................................................................................ 26
3.3.1 Overview of construction sizes .........................................................26
3.3.2 Name plate ....................................................................................... 31
3.3.3 Media-carrying connections.............................................................. 31
3.3.4 Environmental and operating conditions ........................................... 31
3.3.5 Permissible operating materials ........................................................32
3.3.6 Structural operating conditions ......................................................... 32
3.3.7 Technical control requirements .........................................................34
4 Transport.................................................................................................. 36
4.1 Transport hollow clamping cylinder with eyebolt ..................................... 36
4.2 Set down hollow clamping cylinder......................................................... 37
5 Assembly.................................................................................................. 38
5.1 Preparing the machine............................................................................ 38
5.2 Mounting the hollow clamping cylinder at the machine spindle ............... 39
5.3 Assembling the protection against torsion .............................................. 43
5.4 Assembling options on the hollow clamping cylinder .............................. 44
5.4.1 Assembling draw tube option............................................................44
5.4.2 Assembling material feed pipe option ............................................... 46
5.4.3 Assembling leakage oil fitting option................................................. 47
5.4.4 Assembling cover sheet option ......................................................... 48
5.4.5 Mounting the position measuring system/proximity switch option ..... 49
5.4.6 Assembling cylinder flange option..................................................... 52
5.4.7 Balancing the hollow clamping cylinder option.................................. 54
5.5 Connect media-carrying connections...................................................... 57
5.5.1 Connecting hydraulic hoses.............................................................. 57
5.5.2 Connecting the leakage oil hose ....................................................... 58
6 Commissioning ........................................................................................ 58
6.1 Filling the hollow clamping cylinder with hydraulic oil and venting out the
air........................................................................................................... 58
6.2 Carrying out a functional test.................................................................. 61
6.3 Configuring clamping path monitoring .................................................... 62
6.4 Tightening holding screws ...................................................................... 64
7 Operation ................................................................................................. 65

Table of Contents
FORTO-HT EN V
7.1 Production mode .................................................................................... 65
8 Cleaning ................................................................................................... 66
8.1 Cleaning the hollow clamping cylinder .................................................... 66
8.2 Cleaning the coolant drip pan and checking for backlogs ....................... 67
8.3 Check leakage oil tank for backlogs........................................................ 67
9 Maintenance ............................................................................................ 68
9.1 Checking the hollow clamping cylinder ................................................... 68
9.2 Checking the non-return valves .............................................................. 69
10 Storage..................................................................................................... 72
11 Troubleshooting....................................................................................... 72
12 Decommissioning and disassembly ........................................................ 73
13 Disposal ................................................................................................... 74
14 Appendix .................................................................................................. 75
14.1 Test record ............................................................................................. 75
14.2 Declaration of Incorporation ................................................................... 76
15 Notes ........................................................................................................ 77

1 | About this operating manual
6 / 80 FORTO-HT EN
1About this operating manual
This Operating manual describes in detail the use, installation, assembly
and maintenance of a cylinder with through-hole FORTO-HT. The efficiency
of the cylinder with through-hole depends primarily on correct use and care-
ful maintenance. This Operating manual serves as the leading document
and is provided on delivery of the product. The personnel must have care-
fully read and understood the Operating manual before beginning any work.
Observance of all safety instructions and instructions for use in these Oper-
ating manual is the basic prerequisite for safe work with the cylinder with
through-hole. In addition to the regulations listed here, local and user-re-
lated operating instructions and professional accident prevention regula-
tions are to be observed.
1.1 Manufacturer Details
RÖHM GmbH
Heinrich-Röhm-Straße 50
89567 Sontheim/Brenz
Germany
Tel.: [phone]
Fax: [phone]
Web: www.roehm.biz
E-mail: [email protected]
1.2 Copyright
This Operating manual is protected by copyright and is intended for internal
purposes only.
The forwarding of the Operating manual to third parties, reproduction by
any means – even in part – as well as use and/or communication of the con-
tent without the permission of RÖHM are prohibited (except for internal pur-
poses).
Infringements will lead to claims for compensation. We reserve the right to
assert further claims.

About this operating manual | 1
FORTO-HT EN 7 / 80
1.3 Liability and Warranty
All information and instructions in this Operating manual are given in good
faith on the basis of our experience and knowledge to date. The products of
RÖHM are subject to constant further development. RÖHM therefore re-
serves the right to make any modifications and improvements deemed use-
ful. However, there is no obligation to extend these modifications and ex-
tensions to any previously delivered cylinders with through-hole. The cylin-
der with through-hole is constructed exclusively for the purpose specified
under “Intended Use”. Any use beyond this is deemed to be inappropriate.
RÖHM is not liable for damage resulting from such use. The risk is borne
solely by the operator. Product liability for consequential damage of any
type is excluded for damage and operational interruptions resulting from
operating errors, failure to observe this Operating manual or incorrect main-
tenance by unauthorised personnel.
RÖHM expressly points out that replacement and wear parts not supplied
by RÖHM must be authorised by RÖHM. RÖHM does not accept liability for
unauthorised replacement and wear parts. This applies to both product liab-
ility for consequential damage of all types and to liability for damage to
property.
All unauthorised conversions, modifications to the cylinder with through-hole
and/or changes in conditions are not permitted for safety reasons and ex-
clude RÖHM from any liability for any damage which may result. If modifica-
tions to the cylinder with through-hole are necessary or the area of use dif-
fers from the intended use, this must be agreed with the express permission
of RÖHM.
The statutory and contractually agreed terms and conditions apply.
The following damage or defects are excluded from the warranty:
▪caused by the operator due to non-compliance with the written instruc-
tions of RÖHM with regard to
◦commissioning (e.g. incorrect construction and assembly work),
◦operation and
◦maintenance of the equipment (insofar as this maintenance has not been
contractually taken over by RÖHM).
▪caused by technical operating conditions unknown to RÖHM (e.g.
chemical or electrolytic influences) and/or machine specifications.
▪caused by natural wear.
▪caused by force majeure.
▪caused by incorrect operation of all types or by incorrect use or opera-
tion of the cylinder with through-hole. This also includes loading beyond
the specified load limits (e.g. speed, pressure, force, etc.).
This also includes damage caused

1 | About this operating manual
8 / 80 FORTO-HT EN
▪if the operator or third parties carry out modifications or repairs to the
services / products without prior permission of RÖHM. Excepted from
this are damage or defects which have occurred and which were
demonstrably not due to these modifications or repairs.
▪which occur due to use of the cylinder with through-hole under altered
operating conditions (e.g. materials, tools, cutting parameters, pro-
grams, etc.), in particular without consulting and obtaining written au-
thorisation from the seller or RÖHM.
▪which are due to altered environmental conditions.
1.4 Conventions of Presentation
1.4.1 Text Display
To improve legibility and comprehension of the text, the following conven-
tions were agreed:
Text type Marking Function
Operating instruction 1.
2., etc.
Marks a sequence of actions
Marks an individual operating instruc-
tion
Ø
Marks an intermediate result of an
operating instruction
ü
End result of an operating instruction
List ▪Marks elements of a list
Marks comments within a list
Contains useful information or further information.

About this operating manual | 1
FORTO-HT EN 9 / 80
1.4.2 Display of Safety and Warning Instructions
Safety and warning instructions are marked by pictograms. The signal word
and the colouring show the level of danger.
Observe the safety instructions to prevent personal injury and damage to
property.
DANGER
Indicates an imminently dangerous situation
which may lead to death or permanent personal injury if not
avoided.
ØList of all measures which must be taken to prevent con-
sequences.
WARNING
Indicates a possible danger
which may lead to permanent personal injury or death if not
avoided.
ØList of all measures which must be taken to prevent con-
sequences.
CAUTION
Indicates a possible danger
which may lead to minor reversible injuries if not prevented.
ØList of all measures which must be taken to prevent con-
sequences.
NOTICE
Indicates a possible danger
which may lead to damage to property if not avoided.
ØList of all measures which must be taken to prevent con-
sequences.

1 | About this operating manual
10 / 80 FORTO-HT EN
1.5 Definitions
1.5.1 Manufacturer of the machine
In this Operating manual, the manufacturer of the machine is defined as the
company which builds the machine into which the cylinder with through-hole
is integrated.
1.5.2 Manufacturer
In this operating manual, the manufacturer is defined as the manufacturer of
other parts, assemblies or products which are contained in or attached to
the cylinder with through-hole such as rotary feed-throughs, o-rings, operat-
ing materials, etc. and the manufacturer of which is not RÖHM.
1.5.3 Operator
In this Operating manual, the operator is defined as the company which
uses the machine with the cylinder with through-hole to process workpieces.
1.5.4 Assembly information for holding screws
For the correct assembly it is essential to assemble the holding screws ac-
cording to the information. This information is listed as standard in the fol-
lowing way:
Example:
6x
M10x90
12.9
83Nm
Number of holding screws
Screw size
Strength class
Tightening torque
NOTE:
If there is no information for an item, this item is marked by “-”.
NOTE:
Holding screws are not listed in the figure keys. However, special screws
such as screw plugs or venting screws are also listed in the keys.
NOTE:
The tightening torques stated must be adhered to with a tolerance of ±
10%.

About this operating manual | 1
FORTO-HT EN 11 / 80
1.5.5 Dial gage symbol
max. 0,005 mm
Apply a dial gage or other suitable measuring instrument
for measuring of the radial and axial run-out or other
test values at the indicated positions. Besides the dial
gage symbol, the respective test value is specified.
1.5.6 Piston positions front and back
Definition of the piston positions front and back:
NOTICE:
Since the control disc is connected to the piston rod, the control disc
moves analogously to the piston rod.
Piston position front/
front end position
Piston position back/
rear end position
1 2 1 2
1 Control disc 2 Piston rod
Piston position back/rear end position:
▪The piston rod is fully retracted, or as far as the design of the machine
allows.
Piston position front/front end position:
▪The piston rod is fully extended, or as far as the design of the machine
allows.

2 | Safety
12 / 80 FORTO-HT EN
2Safety
2.1 Intended Use
The cylinder with through-hole may only be used for the following purposes:
▪To activate rotating chucks, collet chucks, mandrels with a tensioning
and loosening function for workpiece clamping in a stationary machine
in compliance with all the operating conditions detailed in this Operating
manual.
▪The workpiece can be machined on the idle or rotating cylinder with
through-hole.
▪Bars can be guided through the cylinder with through-hole.
▪For operation in a non-explosive area.
▪Only for commercial use.
2.2 Improper use
The following purposes are deemed improper use of the cylinder with
through-hole:
▪Use to form workpieces/materials
▪Combined with a chuck or another gripping mechanism to lift and trans-
port workpieces.
▪Safety-critical applications (use not together with a chuck, but with
other components, e.g. use as an actuator).
▪Vertical installation of the cylinder with through-hole.
▪Operation of the cylinder with through-hole outside of the operating con-
ditions detailed in this Operating manual.
▪Use in an explosive area.
▪Mobile use, e.g. in vehicles.
▪Private use
2.3 Obligations of the operator
2.3.1 General
Before all work on and with the cylinder with through-hole, the operator is to
ensure:
▪that the operating instructions are available to the responsible person-
nel.
▪that the responsible personnel are sufficiently qualified for their work.
◦This applies in particular to assembly, maintenance and repair.

Safety | 2
FORTO-HT EN 13 / 80
▪that the responsible personnel have read and understood the operating
instructions.
◦ RÖHM recommends that this be documented in a suitable form.
▪that the cylinder with through-hole is in perfect technical working order.
▪that any damaged and defective parts are replaced immediately.
2.3.2 Rotation
DANGER
Danger to life by being caught on or pulled into the rotating
cylinder with through-hole
ØBefore operating the cylinder with through-hole, carry out a
risk assessment/hazard assessment and implement measures
derived from this for risk minimisation.
▪The cylinder with through-hole must not be operated until a risk assess-
ment of the entire machine with the cylinder with through-hole has been
carried out by the manufacturer of the machine and the use of the cylin-
der with through-hole has been approved.
In accordance with the standard sheet VDMA 34192 (section 4.1.1), the
following must be considered in particular:
◦the clamping force, actuating pressure/force and/or clamping distance
sufficient to maintain safe clamping of the workpiece/tool,
◦devices for monitoring the clamping conditions, as well as
◦protection against interference in hazardous areas of rotating clamping
devices and moving clamping elements.
2.3.3 Installation/replacement/conversion/change
The product described in this Operating manual is defined as an incomplete
machine in accordance with the Machinery Directive 2006-42-EC and the
harmonised type C standard DIN EN 1550 (ISO 16156).
If this used, defective or serviced product is to be replaced with the same
new product, no further tests are required.
If not, there may be a significant modification which is to be examined.
Any modifications to a machine, whether used or new, which may impair the
protection of the legal rights or assets, e.g. by performance increases, func-
tional changes, changes in the intended use (as by changing auxiliary, oper-
ating and input materials, conversions or changes to safety technology),
must first be examined in view of their safety-relevant effects. This means
that in each individual case it must be determined whether new hazards

2 | Safety
14 / 80 FORTO-HT EN
have arisen due to the modification of the (used) machine or whether an ex-
isting risk has increased. Here you can differentiate between three cases
here:
a) There is no new hazard or an increase in an existing risk so that the ma-
chine can still be regarded as safe.
b) Although there is a new hazard or an increase in an existing risk, the ex-
isting protective measures of the machine before the modification are
still sufficient so that the machine can still be regarded as safe.
c) A new hazard or an increase in an existing risk exists and the existing
protective measures are not sufficient or suitable.
Modified machines according to case 1 or 2 do not require additional pro-
tective measures. Modified machines according to case 3 must, on the
other hand, be further examined by means of a risk assessment with regard
to the question of whether a major modification has been made.
Here, it is to be determined whether it is possible to return the modified ma-
chine to a safe condition with simple safety devices, checking whether the
simple safety device eliminates the risk or at least minimises it to a suffi-
cient extent. If this is the case, the modification can generally be regarded
as not essential.
The replacement of components of the machine by identical components or
components with identical function and identical safety level as well as the
installation of protective devices which lead to an increase in the safety
level of the machine and which do not enable any additional functions, are
not regarded as significant modifications.
NOTICE:
However, irrespective of this, other regulations incumbent upon the em-
ployer who makes the machine available to its employees as work equip-
ment may result in the obligation to define additional protective measures.
In principle, a risk assessment must be carried out after all modifications to
machinery – not only after significant modifications. This is one of the oper-
ational health and safety obligations of the user of a machine or system as
work equipment. Based on the risk assessment, measures, in particular
technical measures, may be necessary in order to provide the employees
with safe work equipment. It must be checked whether an adaptation of the
information for the safe operation of the machines, such as operating in-
structions, is necessary.

Safety | 2
FORTO-HT EN 15 / 80
2.4 Qualification of Operating and Specialist Personnel
Definition of “skilled worker”
A person is designated as a skilled worker when they can assess the work
assigned to them and identify possible dangers based on their specialist
training, knowledge and experience. They also have knowledge of the relev-
ant provisions. This refers only to trained specialist personnel or such per-
sonnel that the operator has found to be capable.
Definition of “trained/instructed person”
A trained/instructed person is someone who has been taught about, and if
necessary trained in, the tasks assigned to them and about the possible
dangers of improper conduct. They have also been taught about the neces-
sary safety equipment and protective measures. Personnel to be taught,
trained, instructed or personnel undergoing general training may only work
under the constant supervision of an experienced person.
2.5 Personal protective equipment
When working on and with the cylinder with through-hole, personal protect-
ive equipment must be worn.
▪Personal protective equipment must be in perfect condition when carry-
ing out work. Defective protective equipment is to be replaced immedi-
ately.
▪Observe information about personal protective equipment posted in the
working area around the machine.
Wear safety goggles
Wear protective gloves
Wear safety shoes
Wear protective clothing
NOTICE:
Persons with long hair must wear a hair-net when working with the cylinder
with through-hole.
Wear ear protection
NOTICE:
Ear protection must be worn if the cylinder with through-hole causes noise.

2 | Safety
16 / 80 FORTO-HT EN
2.6 General hazards
When using the cylinder with through-hole, residual hazards exist
▪during assembly and set-up work.
▪during operation.
▪during maintenance and service work.
These residual hazards cannot be completely eliminated considering the
functional availability of the Clamping device. This is why the operating
manual must be followed.
2.6.1 Skin irritation due to operating materials
Description of the hazard:
Operating materials such as hydraulic oil, compressed air, lubricants etc.
can contain substances which can lead to skin irritation when touched.
Avoiding the hazard:
▪Avoid contact with the operating materials
▪Wear personal protective equipment when handling the operating ma-
terials
▪Observe the safety data sheets of the operating materials
2.6.2 Risk of injury due to handling heavy loads
Description of the hazard:
If the cylinder with through-hole is handled manually, this can lead to the
person handling it becoming overloaded or injured due to the weight of the
cylinder with through-hole.
Avoiding the hazard:
Do not handle the cylinder with through-hole manually. Instead, lift it, put it
down, transport it, assemble or disassemble it using suitable lifting gear.

Safety | 2
FORTO-HT EN 17 / 80
2.6.3 Risk of burns due to hot surfaces
Hazard zone
Description of the hazard:
The cylinder with through-hole may heat up during operation. There is a risk
of burning in case of contact with the cylinder with through-hole.
Avoiding the hazard:
Keep away from the cylinder with through-hole immediately after it was in
operation and let it cool down before carrying out any work.

2 | Safety
18 / 80 FORTO-HT EN
2.6.4 Danger of crushing due to moving control disc
2
1
34
1 Position measuring system op-
tion
3 Control disc
2 Piston housing 4 Distributor housing
Hazard zone
Description of the hazard:
When moving the piston, the control disc also moves, giving rise to a crush-
ing hazard between the control disc
▪and the distributor housing
▪and the piston housing
▪and the position measuring system option or the proximity switch op-
tion
Avoiding the hazard:
Do not reach into the control disc movement range.

Safety | 2
FORTO-HT EN 19 / 80
2.6.5 Risk of entrapment/crushing on the hollow clamping cylinder
1 2
3
1 Bars 3 Opening of the piston rod and/
or the material feed pipe option
2 Coolant drip pan - -
Hazard zone
Description of the hazard:
When bars are guided through the cylinder with through-hole, there is a risk
of entrapment/crushing:
▪between the bars and the opening of the coolant drip pan
▪between the bars and the opening of the piston rod and/or the material
feed pipe option

2 | Safety
20 / 80 FORTO-HT EN
Avoiding the hazard:
▪do not reach into the area between the bars and the opening of the
coolant drip pan
▪do not reach into the area between the bars and the opening of the pis-
ton rod and/or the material feed pipe
2.6.6 Risk of ejection, detachment and falling of components at the hollow
clamping cylinder
Description of the hazard:
In case of failure of components of the cylinder with through-hole or non-
compliance with specifications of the cylinder with through-hole (e.g. incor-
rect assembly, excessive speed, excessive processing force, incorrect ac-
tuating force, insufficient maintenance, wear, exceeding the service life),
parts of the cylinder with through-hole can be ejected.
Avoiding the hazard:
▪All information in the operating manual, assembly drawing and other ap-
plicable documents on the cylinder with through-hole must be observed.
▪Carry out a risk assessment for the machine with the integrated cylinder
with through-hole and implement the derived safety measures.
2.6.7 Risk of ejection, detachment and falling of workpieces
Description of the hazard:
If the operating limits of the cylinder with through-hole are not complied with
(e.g. excessive speed, excessive processing force, insufficient residual
clamping stroke, incorrect actuating force, insufficient maintenance, wear,
exceeding the service life), failure of device components, at insufficient
clamping force, workpieces held by the cylinder with through-hole can be
ejected or fall.
Avoiding the hazard:
▪All information in the operating manual, assembly drawing and other ap-
plicable documents on the cylinder with through-hole must be observed.
▪Carry out a risk assessment for the machine with the integrated cylinder
with through-hole and implement the derived safety measures.