MTS 318 User Manual

be certain.

318 Load Unit Product Information

Model 318.10 Model 318.25 Model 318.50

100-183-837 B

Trademark information MTS is a registered trademark of MTS Systems Corporation within the United

States. This trademark may be protected in other countries.

Molykote is a registered trademark of Dow Chemical Corporation. All other trademarks or service marks are property of their respective owners.

Publication information

MANUAL PART NUMBER PUBLICATION DATE

100-183-837 A June 2007

100-183-837 B April 2009

Contents

Technical Support 7

How to Get Technical Support 7

Before You Contact MTS 7

If You Contact MTS by Phone 9

Problem Submittal Form in MTS Manuals 10

Preface 11

Before You Begin 11

Conventions 12

Documentation Conventions 12

Introduction 15

Load Unit: Overview 15

318 Load Unit: Component Identification 17

318 Load Unit: Component Description 18

318 Load Unit: Specifications 20

Series 661 Force Transducer: Specifications 24

318 Load Unit: Dimensions 26

Safety 33

General Safety Practices 33

Safety Practices Before System Operation 34

Safety Practices While the System Is in Operation 39

Hazard Icons 41

318 Load Unit: Hazard Labels 42

318 Load Unit: Crush Point Hazards 45

318 Load Unit Contents

Installation 47

318 Load Unit: Unpack Upright Configuration 47

318 Load Unit: Unpack Horizontal Configuration 49

318 Load Unit: Connect Cables 54

318 Load Unit: Connect Hydraulics 56

318 Load Unit: Unlock the Crosshead 56

Operation 59

Load Unit: Operation Preface 59

318 Load Unit: Control Module 60

318 Load Unit: Crush Point Hazards 62

318 Load Unit: Specimen Installation 62

318 Load Unit: Position the Crosshead Hydraulically 65

318 Load Unit: Position the Crosshead Manually 66

318 Load Unit: Adjust the Grips’ Clamp Rate 69

318 Load Unit: Adjust the Grips’ Clamp Force 70

Maintenance 73

Routine Maintenance Overview Checklist 74

318 Load Unit: Maintenance Intervals 77

318 Load Unit: Daily Inspections 78

318 Load Unit: Clean the Columns 78

318 Load Unit: Prevent Rust 79

318 Load Unit: Maintain Airmount Pressures 80

318 Load Unit: Bleed the Hydraulic Lift Cylinders 81

318 Load Unit: Adjust the Hydraulic Locks 83

318 Load Unit: Lubricate the Crosshead Locking Bolts 86

318 Load Unit: Align the Force Transducer 87

111 Accumulator: Maintenance Overview 93

111 Accumulator: Check and Change Precharge Pressure 94

244 Actuator: Maintenance 98

298 HSM: Maintenance 98

252 Servovalve: Maintenance Overview 100

252 Servovalve: Replace the Filter Element 100

252 Servovalve: Adjust the Mechanical Null 102

Servohydraulic Load Frame Maintenance and Service Logs 107

Contents

318 Load Unit

8 Hours/Daily 108

40 Hours/Weekly 109

80 Hours/Biweekly 110

500 Hours: Crosshead and Frame 111

500 Hours: Actuator 112

500 Hours: HSM 113

500 Hours: Hoses and Cables 114

500 Hours: Overall Complete System 115

500 Hours: Grips 116

1000 Hours 117

2000 Hours: Annual Maintenance 118

318 Load Unit Contents

Contents

318 Load Unit

Technical Support

How to Get Technical Support

Start with your

manuals

Technical support

methods

MTS web site

www.mts.com

E-mail techsupport@mts.com

Telephone MTS Call Center 800-328-2255

Fax 952-937-4515

Technical support

outside the U.S.

The manuals supplied by MTS provide most of the information you need to use and maintain your equipment. If your equipment includes MTS software, look for online help and README files that contain additional product information.

If you cannot find answers to your technical questions from these sources, you can use the internet, e-mail, telephone, or fax to contact MTS for assistance.

MTS provides a full range of support services after your system is installed. If you have any questions about a system or product, contact MTS in one of the following ways.

The MTS web site gives you access to our technical support staff by means of a Technical Support link:

www.mts.com > Contact MTS > Service & Technical Support

Weekdays 7:00 A.M. to 5:00 P.M., Central Time

Please include “Technical Support” in the subject line.

For technical support outside the United States, contact your local sales and service office. For a list of worldwide sales and service locations and contact information, use the Global MTS link at the MTS web site:

www.mts.com > Global MTS > (choose your region in the right-hand column) > (choose the location closest to you)

Before You Contact MTS

MTS can help you more efficiently if you have the following information available when you contact us for support.

Know your site

number and system

number

318 Load Unit Technical Support

The site number contains your company number and identifies your equipment type (material testing, simulation, and so forth). The number is usually written on a label on your MTS equipment before the system leaves MTS. If you do not have or do not know your MTS site number, contact your MTS sales engineer.

Example site number: 571167

When you have more than one MTS system, the system job number identifies which system you are calling about. You can find your job number in the papers sent to you when you ordered your system.

Example system number: US1.42460

Know information from

prior technical

If you have contacted MTS about this problem before, we can recall your file. You will need to tell us the:

assistance

• MTS notification number

• Name of the person who helped you

Identify the problem Describe the problem you are experiencing and know the answers to the

following questions:

• How long and how often has the problem been occurring?

• Can you reproduce the problem?

• Were any hardware or software changes made to the system before the

problem started?

• What are the model numbers of the suspect equipment?

• What model controller are you using (if applicable)?

• What test configuration are you using?

Know relevant

computer information

Know relevant

software information

If you are experiencing a computer problem, have the following information available:

• Manufacturer’s name and model number

• Operating software type and service patch information

• Amount of system memory

• Amount of free space on the hard drive in which the application resides

• Current status of hard-drive fragmentation

• Connection status to a corporate network

For software application problems, have the following information available:

• The software application’s name, version number, build number, and if

available, software patch number. This information is displayed briefly when you launch the application, and can typically be found in the “About” selection in the “Help” menu.

• It is also helpful if the names of other non-MTS applications that are

running on your computer, such as anti-virus software, screen savers, keyboard enhancers, print spoolers, and so forth are known and available.

Technical Support

318 Load Unit

If You Contact MTS by Phone

Your call will be registered by a Call Center agent if you are calling within the United States or Canada. Before connecting you with a technical support specialist, the agent will ask you for your site number, name, company, company address, and the phone number where you can normally be reached.

If you are calling about an issue that has already been assigned a notification number, please provide that number. You will be assigned a unique notification number about any new issue.

Identify system type To assist the Call Center agent with connecting you to the most qualified

technical support specialist available, identify your system as one of the following types:

• Electromechanical materials test system

• Hydromechanical materials test system

• Vehicle test system

• Vehicle component test system

• Aero test system

Be prepared to

troubleshoot

Write down relevant

information

After you call MTS logs and tracks all calls to ensure that you receive assistance and that action

Prepare yourself for troubleshooting while on the phone:

• Call from a telephone when you are close to the system so that you can try

implementing suggestions made over the phone.

• Have the original operating and application software media available.

• If you are not familiar with all aspects of the equipment operation, have an

experienced user nearby to assist you.

Prepare yourself in case we need to call you back:

• Remember to ask for the notification number.

• Record the name of the person who helped you.

• Write down any specific instructions to be followed, such as data recording

or performance monitoring.

is taken regarding your problem or request. If you have questions about the status of your problem or have additional information to report, please contact MTS again and provide your original notification number.

318 Load Unit Technical Support

Problem Submittal Form in MTS Manuals

Use the Problem Submittal Form to communicate problems you are experiencing with your MTS software, hardware, manuals, or service which have not been resolved to your satisfaction through the technical support process. This form includes check boxes that allow you to indicate the urgency of your problem and your expectation of an acceptable response time. We guarantee a timely response—your feedback is important to us.

The Problem Submittal Form can be accessed:

• In the back of many MTS manuals (postage paid form to be mailed to MTS)

• www.mts.com > Contact Us > Problem Submittal Form (electronic form to

be e-mailed to MTS)

Technical Support

318 Load Unit

Preface

Before You Begin

Safety first! Before you attempt to use your MTS product or system, read and understand the

Safety manual and any other safety information provided with your system. Improper installation, operation, or maintenance of MTS equipment in your test facility can result in hazardous conditions that can cause severe personal injury or death and damage to your equipment and specimen. Again, read and understand the safety information provided with your system before you continue. It is very important that you remain aware of hazards that apply to your system.

Other MTS manuals In addition to this manual, you may receive additional MTS manuals in paper or

electronic form.

If you have purchased a test system, it may include an MTS System Documentation CD. This CD contains an electronic copy of the MTS manuals that pertain to your test system, including hydraulic and mechanical component manuals, assembly drawings and parts lists, and operation and preventive maintenance manuals. Controller and application software manuals are typically included on the software CD distribution disc(s).

318 Load Unit Preface

Conventions

DANGER

WARNING

CAUTION

Conventions

Documentation Conventions

The following paragraphs describe some of the conventions that are used in your MTS manuals.

Hazard conventions As necessary, hazard notices may be embedded in this manual. These notices

contain safety information that is specific to the task to be performed. Hazard notices immediately precede the step or procedure that may lead to an associated hazard. Read all hazard notices carefully and follow the directions that are given. Three different levels of hazard notices may appear in your manuals. Following are examples of all three levels.

Note For general safety information, see the safety information provided with

your system.

Danger notices indicate the presence of a hazard with a high level of risk which, if ignored, will result in death, severe personal injury, or substantial property damage.

Warning notices indicate the presence of a hazard with a medium level of risk which, if ignored, can result in death, severe personal injury, or substantial property damage.

Caution notices indicate the presence of a hazard with a low level of risk which, if ignored, could cause moderate or minor personal injury, equipment damage, or endanger test integrity.

Notes Notes provide additional information about operating your system or highlight

easily overlooked items. For example:

Note Resources that are put back on the hardware lists show up at the end of

the list.

Special terms The first occurrence of special terms is shown in italics.

Illustrations Illustrations appear in this manual to clarify text. It is important for you to be

aware that these illustrations are examples only and do not necessarily represent your actual system configuration, test application, or software.

Electronic manual

conventions

This manual is available as an electronic document in the Portable Document File (PDF) format. It can be viewed on any computer that has Adobe Acrobat Reader installed.

Preface

318 Load Unit

Conventions

Hypertext links The electronic document has many hypertext links displayed in a blue font. All

blue words in the body text, along with all contents entries and index page numbers, are hypertext links. When you click a hypertext link, the application jumps to the corresponding topic.

318 Load Unit Preface

Conventions

Preface

318 Load Unit

Introduction

Model 318

Model 322

Model 359

Typical Load Units

Load Unit: Overview

The Load Unit is the primary structure for most materials testing. It is a standalone testing unit. The load unit consists of the load frame plus additional parts, such as hydraulic crosshead lifts and control modules. Load units come in different sizes and shapes. The following illustration shows typical load units with common accessories.

The Load Units are designed for testing materials. They can perform tension and compression tests, fatigue and fracture mechanics tests, as well as other tests. MTS manufactures a variety of grips, mounting fixtures, test area guards, and environmental chambers that can be used with the load unit.

318 Load Unit Introduction

What you

need to know

MTS Systems Corporation assumes that you know how to use your controller. See the appropriate manual for information about performing any controllerrelated step in this manual’s procedures. You are expected to know how to perform the following procedures:

• Turn hydraulic pressure on and off

• Select a control mode

• Adjust the actuator position

• Zero a sensor signal

• Zero a sensor output

• Use your grips and fixtures

• Define a simple test

• Run a test

Introduction

318 Load Unit

318 Load Unit: Component Identification

Component Descriptions

TEM COMPONENT DESCRIPTION

1 Crosshead

Moves the up and down the column to accommodate different sized specimens and fixtures. The crosshead is stiff and light weight; it is one end of the force train.

2 Crosshead locks

3 Crosshead lifts

Clamps the crosshead to the columns. The locks are hydraulically powered.

Raises and lowers the crosshead hydraulically to accommodate different specimen sizes. The lifts are small hydraulic actuators.

318 Load Unit Introduction

Component Descriptions

TEM COMPONENT DESCRIPTION

4 Control panel

Grip controls

Crosshea d lift control

Emergenc y Stop

5 Servovalve

6Isolation pads

7 Accumulators

8LVDT

9Manifold

The Emergency Stop button is standard; the other controls are optional.

Clamps and unclamps the hydraulically controlled grips during specimen installation and removal.

Controls the crosshead lifts to raise and lower the crosshead hydraulically.

Removes hydraulic pressure from the load unit and issues an interlock signal to the controller to stop the test program.

Controls both the flow rate and the direction of fluid entering the actuators. It determines how fast the actuator extends or retracts.

Dampens the natural frequency to about 20 Hz. Optional air inflated isolators dampen the frequency to about 2 Hz.

Stores hydraulic fluid under pressure to increase the actuator’s response time. One accumulator connects to the pressure line; the other to the return line.

Measures the displacement of the actuator’s travel. The linear variable displacement transducer (LVDT) is located inside the actuator.

Serves as the junction point between the hydraulic power unit (HPU), accumulators, servovalve, and actuator. The actuator manifold controls the hydraulic circuit that connects the hydraulic components.

10 Linear actuator

Applies axial forces to specimens. The actuator is a hydraulically powered device that provides linear displacement of (or forces into) a specimen. Grips and fixtures can be mounted to the actuator.

11 Force transducer

12 Lifting rings

Measures the axial forces applied to specimen.

Allows the load unit to be moved by lifting the entire load unit.

318 Load Unit: Component Description

The load unit is a stand alone testing structure. It consists of the following components:

• Load frame

• Crosshead lifts and locks

• Manifold

–Actuators

– Servovalves

– Accumulators

• Transducers

Introduction

• Grip controls

318 Load Unit

Load frame The load frame is the basic structure which provides the reaction mass for the

force train. The base of the load frame is one end of the reaction mass and the crosshead is the other end of the reaction mass. Installing a specimen and other fixtures or components between the load unit base and the crosshead create a force train.

The load frame and the other hydraulic components mounted to it collectively create the load unit. The base houses the actuators, servovalves, and hydraulic manifold. The crosshead is mounted above the base by two columns. A control panel lets you operate the crosshead lifts, locks, and grips to assist in specimen installation procedures.

Crosshead lifts

and locks

The crosshead can be positioned anywhere along the load frame columns. It is moved along the column with hydraulic lifts. When the crosshead is in an appropriate test position, it is hydraulically clamped to that position. This lets you change the load unit to test specimens of different lengths.

Actuator manifold The Series 298 Actuator Manifold (also called a hydraulic service manifold or

HSM) acts as the hydraulic interface between the HPU and the components mounted to the manifold (actuator, servovalves, and accumulators) of the load unit. It contains the required hydraulic porting and plumbing to accommodate the hydraulic components. The manifold can also control the hydraulic pressure to the load unit.

Actuators The Series 244 Actuators can be located in the middle of the load unit base or

crosshead. It is a hydraulically powered piston that applies displacement of (or force into) a specimen. It can apply equal power in tension and compression. One end of the test specimen is installed into a fixture which is mounted to the end of the actuator rod.

Servovalves The Series 252 Servovalves regulates the direction and flow of the hydraulic

fluid to and from a hydraulic actuator. The servovalve responds to the polarity and magnitude of the command signal generated by the controller.

Accumulators The Series 111 Accumulators suppress line-pressure fluctuations. The load unit

includes a pressure-line accumulator to provide fluid storage so a constant line pressure can be maintained at the servovalves for maximum performance. The return-line accumulator minimizes return-line pressure fluctuations.

Pressure control The load unit can be configured for several pressure configurations. The free low

configuration passes the hydraulic pressure from the HPU (or hydraulic service manifold) through the manifold to the hydraulic components. The hydraulic pressure options include on/off control, high/low/off control, and high/low/off control with a proportional valve to ramp the pressure transitions.

Transducers The load unit includes a force transducer and an LVDT.

Force The force transducer (also called load cell or force sensor) measures the amount

of tension or compression and rotational torque applied to it. It has four strain gages that form a balanced Wheatstone bridge. When forces are applied to the bridge, it becomes unbalanced and produces an electrical signal that is proportional to the force applied to it. The force transducer is a resistive device and requires a DC conditioner to process the axial signal from the Wheatstone bridge.

318 Load Unit Introduction

LVDT The LVDT measures the linear actuator’s travel. The LVDT consists of a

transformer with one primary and two secondary coils wound on a common cylinder. The coil is stationary inside the actuator. A core is attached to the piston rod of the actuator. As it moves inside the coil, it produces an electrical signal that represents the position of the piston rod. The phase of the signal indicates the direction the actuator rod is moving. An LVDT requires an AC conditioner to process the signal.

Grip Controls The grip controls provide independent clamping control of the upper and lower

grips. The maximum pressure for the grip controls can be set up to 69 MPa (10,000 psi). The pressure is factory set to 20 MPa (3000 psi); 45 MPa (6500 psi); or 69 MPa (10,000 psi) to accommodate a variety of grips manufactured by MTS Systems Corporation. A front panel control allows the grip pressure to be adjusted within the factory setting. A rate control sets how fast the grips open and close.

318 Load Unit: Specifications

This section provides the specifications of the Series 318 Load Unit.

General specifications The following table lists general specifications for the Series 318 Load Unit:

ARAMETER SPECIFICATION

Load frame

Lifts

Locks

Grip control

Service manifold

Maximum flow

Axial actuator

Displacements

Accumulator Series 111 Accumulator

Hydraulic (optional)

Series 298 Actuator Manifold

114 L/min (30 gpm)

Series 244 Actuator

100 mm (4 in) 150 mm (6 in) 250 mm (10 in)

Introduction

318 Load Unit

PARAMETER SPECIFICATION

Force Ratings The Series 318 Load Units include other products. The following table lists

MODEL FRAME

FATIGUE RATING

Weight*

Base mount

318.10

318.25

318.50

Crosshead mount

318.10

318.25

318.50

* The weight specification is for lifting and moving purposes. The weight of

accessories and special fixtures must be added. The actual shipping weight must be determined by a scale.

approximate minimum weight

500 kg (1100 lb) 960 kg (2120 lb) 1900 kg (4200 lb)

555 kg (1225 lb) 1065 kg (2345 lb) 2100 kg (4625 lb)

specifications from several product information manuals. Specifications listed in the respective product information manual supersede the following specifications.

ACTUATOR

ATING

TRANSDUCER R

ATING

MOUNTING T

HREADS

318.10 100 kN (22 kip)

318.25 250 kN (55 kip)

318.50 500 kN (110 kip)

* At 21 MPa (3000 psi)

Stiffness Data Stiffness is a way to measure the deflection of the force train. Deflection rates can

25 kN (5.5 kip)

50 kN (11 kip)

100 kN (22 kip)

250 kN (55 kip)

500 kN (110 kip)

25 kN (5.5 kip)

50 kN (11 kip)

100 kN (22 kip)

250 kN (55 kip)

500 kN (110 kip)

M27 x 2 (1 - 14 UNS)

M36 x 2 (1 1/2 - 12 UNF)

M52 x 2 (2 -12 UNF)

vary 20%, depending on the actuator and force transducer you use.

318 Load Unit Introduction

For the most accurate high frequency test results, use a load unit with a fatigue

rating that is larger than its actuator’s force rating.

For example, a Model 318.25 Load Unit with a 55 kip fatigue rating and a 22 kip actuator will have smaller deflections than a Model 318.10 Load Unit with a 22 kip fatigue rating and a 22 kip actuator.

Spring rates are determined at each load unit’s full fatigue rating with its crosshead raised 1270 mm (50 in.) above the baseplate.

The Stiffness Graph shows how stiffness is affected when the height of the crosshead is changed.

DEFLECTIONS MODEL 318.10

100

KN/22 KIP

A - B base 0.15 mm 0.006 in 0.18 mm 0.007 in 0.20 mm 0.008 in

B - C columns 0.10 mm 0.004 in 0.15 mm 0.006 in 0.18 mm 0.007 in

C - D crosshead 0.13 mm 0.005 in 0.25 mm 0.010 in 0.28 mm 0.011 in

Introduction

MODEL 318.25 250

KN/55 KIP

MODEL 318.50 500

KN/110 KIP

318 Load Unit

DEFLECTIONS MODEL 318.10

Free Column Length (cm)

Free Column Length (in)

Maximum Side Load Limits (kips)

Maximum Side Load Limits (kN)

10 25 50 125 250

5 10 20 50 100

0.5

4.5

318.10

318.25

318.50

100

KN/22 KIP

A - D overall frame 0.38 mm 0.015 in 0.58 mm 0.023 in 0.66 mm 0.026 in

MODEL 318.25 250

KN/55 KIP

MODEL 318.50 500

KN/110 KIP

Spring rates

2.6 x 10

(1.5 x 10

N/m

lb/in)

4.3 x 10

(2.4 x 10

N/m

lb/in)

7.5 x 10

(4.3 x 10

N/m

ib/in)

Stiffness Graph

318 Load Unit Introduction

Series 661 Force Transducer: Specifications

The force transducer used with this system is a Series 661 Force Transducer. The following are the specifications for the force transducers.

ARAMETER SPECIFICATION

Maximum excitation voltage 15 V DC

Bridge resistance 350 ¾

Maximum crosstalk 1.0% of full scale torsional to load

Hysteresis 0.08% of full scale (250 N–2.5 kN)

Nonlinearity 0.08% of full scale

0.05% of full scale (5 kN–50 kN)

0.15% of full scale (100 kN–500 kN)

0.20% of full scale (1000 kN)

0.15% of full scale for Models 661.22/.23/.31

Temperature

Output 2 mV/V at full-scale load

Connector PT02ER-10-6P

MODEL LOAD CAPACITY

661.11-01 250 N (50 lbf)

661.11-02 500 N (100 lbf)

661.18-01 1 kN (220 lbf)

661.18-02 2.5 kN (550 lbf)

661.19-01 5 kN (550 lbf)

Usable range Compensated range Sensitivity

THREAD SIZE

M6 x 1.0 mm x 6.3 mm (1/4 - 28 UNF x 0.25 in

M6 x 1.0 mm x 6.3 mm (1/4 - 28 UNF x 0.5 in

M12 x 1.25 mm x 25.4 mm (1/2 - 20 UNF x 1.0 in)

0.004% of reading/°C (0.002%/°F)

-54°C (-65°F) to +121°C (+250°F) +21°C (+70°F) to +77°C (+170°F)

0.0036% of full scale/°C (0.0020% of full scale/°F)

WEIGHT

0.45 kg (1 lb)

2.27 kg (5 lb)

3.07 kg (6.75 lb)

661.19-02 10 kN (2.2 kip)

661.19-03 15 kN (3.3 kip)

661.19-04 25 kN (5.5 kip)

Introduction

M12 x 1.25 mm x 25.4 mm (1/2 - 20 UNF x 1.0 in)

3.07 kg (6.75 lb)

318 Load Unit

MODEL LOAD CAPACITY

THREAD SIZE

WEIGHT

661.20-01 25 kN (5.5 kip)

661.20-02 50 kN (11 kip)

661.20-03 100 kN (2.2 kip)

661.22-01 250 kN (3.3 kip)

661.23-01 500 kN (5.5 kip)

661.31-01 1000 kN (220 kip)

* The thread sizes are available with either coarse or fine threads.

M27 x 2.0 mm x 31.7 mm (1 - 14 UNS-3B x 1.25 in)

M36 x 2.0 mm (1 1/2 - 12 UNC-2B)

M52 x 2.0 mm x 48.3 mm (2.0 - 12 UN-2B x 1.9 in)

M76 x 1.75 mm x 28.4 mm (2.0 - 12 UN-2B x 1.35 in)

Dimensions The following dimensions are rounded off to the nearest millimeter or eight-inch.

9.75 kg (21.5 lb)

13.2 kg (29 lb)

16 kg (35.3 lb)

49.9 kg (110 lb)

MODEL A

661.11-01 70 mm

(2–3/4 in)

661.18-01 105 mm

(4–1/4 in)

661.19-01 105 mm

(4–1/4 in)

661.20-01 154 mm

(6 in)

661.22-01 114 mm

(4–1/2 in)

661.23-01 152 mm

(6 in)

661.31-01 222 mm

(8–3/4 in)

* This dimension applies to both ends

318 Load Unit Introduction

18 mm (3/4 in)

32 mm (1–1/4 in)

57 mm (2–1/4 in)

92 mm (3–5/8 in)

140 mm (5–1/5 in)

203 mm (8 in)

CD*E

7 mm (1/4 in)

10 mm (3/8 in)

1 mm (>1/4 in)

N/A 203 mm

N/A 305 mm

38 mm (1–1/5 in)

67 mm (2–5/8 in)

67 mm (2-5/8 in)

95 mm (3–3/4n)

203 mm (8 in)

(8 in)

(12 in)

61 mm (2–3/8 in

64 mm (2–1/5 in)

89 mm (3–1/2 in)

74 mm (2–7/8 in)

86 mm (3–3/8 in)

124 mm (4–7/8 in)

318 Load Unit: Dimensions

Standard column lengths indicated

Note: Dimensions are inches

(mm)

Weight: 1100 lbs (500 kg) is normal maximum

weight. Accessories and special fixtures

must be added. This weight specification

is for lifting and moving purposes.

Actual shipping weight must be

determined by scale.

Introduction

318.10B Load Unit Dimensions

318 Load Unit

Standard column lengths indicated

Note: Dimensions are inches

(mm)

Standard column lengths indicated

Note: Dimensions are inches

(mm)

318.25B Load Unit Dimensions

318 Load Unit Introduction

Standard column lengths

Note: Dimensions are

(mm

Weight: 4200 lbs (1900 kg) is normal

maximum weight. Accessories and

special

fixtures must be added. This weight

specification is for lifting and moving

purposes. Actual shipping weight

318.50B Load Unit Dimensions

Introduction

318 Load Unit

Standard column lengths

Standard 6" (152.5 mm) actuator stroke indicated

Note: Dimensions are

(mm

Weight: 1100 lbs (500 kg) is normal

maximum

weight. Accessories and special fixtures

must be added. This weight specification

is for lifting and moving purposes.

Actual shipping weight must be

318.10B Load Unit with Crosshead Actuator Dimensions

318 Load Unit Introduction

Standard column lengths indicated

Standard 6" (152.5 mm) actuator stroke indicated

Note: Dimensions are inches

(mm)

Weight: 2120 lbs (960 kg) is normal maximum

weight. Accessories and special fixtures

must be added. This weight specification

is for lifting and moving purposes.

Actual shipping weight must be

determined by scale.

318.25B Load Unit with Crosshead Actuator Dimensions

Introduction

318 Load Unit

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