MTS 318 User Manual

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318 Load Unit

Product Information

Model 318.10

Model 318.25

Model 318.50

100-183-837 B

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
	45
	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

318 Load Unit

Technical Support

How to Get Technical Support

Start with your manuals

Technical support methods

MTS web site

www.mts.com

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

E-mail

Telephone

Fax

Technical support outside the U.S.

techsupport@mts.com

MTS Call Center 800-328-2255

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

952-937-4515

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

Know your site number and system number

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

318 Load Unit

Technical Support

Know information from prior technical assistance

Identify the problem

Know relevant computer information

Know relevant software information

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

•MTS notification number

•Name of the person who helped you

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?

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

Identify system type

Be prepared to troubleshoot

Write down relevant information

After you call

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.

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

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.

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

Other MTS manuals

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.

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

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

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

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

Notes

Special terms

Illustrations

Electronic manual conventions

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 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.

The first occurrence of special terms is shown in italics.

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.

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.

12 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 13

Conventions

14 Preface

318 Load Unit

Introduction

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.

Typical Load Units

Model 318

Model 322

Model 359

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

	3
	10
	9
	4
	5
8	7
	6

		Component Descriptions
ITEM	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.

2Crosshead locks Clamps the crosshead to the columns. The locks are hydraulically powered.

3Crosshead lifts Raises and lowers the crosshead hydraulically to accommodate different

specimen sizes. The lifts are small hydraulic actuators.

318 Load Unit

Introduction

		Component Descriptions
ITEM	COMPONENT	DESCRIPTION

4	Control panel

Grip controls

Crosshea d lift control

Emergenc

y Stop

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.

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

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

7	Accumulators	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.

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

9	Manifold	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	Measures the axial forces applied to specimen.

12	Lifting rings	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

•Grip controls

Introduction

318 Load Unit

Load frame

Crosshead lifts and locks

Actuator manifold

Actuators

Servovalves

Accumulators

Pressure control

Transducers

Force

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.

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.

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.

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.

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.

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.

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.

The load unit includes a force transducer and an LVDT.

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

Grip Controls

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.

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:

PARAMETER	SPECIFICATION

Load frame
Lifts	Hydraulic (optional)
Locks	Hydraulic (optional)
Grip control	Hydraulic (optional)

Service manifold	Series 298 Actuator Manifold
Maximum flow	114 L/min (30 gpm)

Axial actuator	Series 244 Actuator
Displacements	100 mm (4 in)
	150 mm (6 in)
	250 mm (10 in)

Accumulator	Series 111 Accumulator

Introduction

318 Load Unit

PARAMETER	SPECIFICATION

Weight*	approximate minimum weight
Base mount

318.10500 kg (1100 lb)

318.25960 kg (2120 lb)

318.501900 kg (4200 lb)

Crosshead mount

318.10555 kg (1225 lb)

318.251065 kg (2345 lb)

318.502100 kg (4625 lb)

*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.

Force Ratings The Series 318 Load Units include other products. The following table lists specifications from several product information manuals. Specifications listed in the respective product information manual supersede the following specifications.

MODEL	FRAME	ACTUATOR	TRANSDUCER	MOUNTING
	FATIGUE RATING	RATING*	RATING	THREADS
318.10	100 kN	25 kN	25 kN	M27 x 2
	(22 kip)	(5.5 kip)	(5.5 kip)	(1 - 14 UNS)

		50 kN	50 kN	M27 x 2
		(11 kip)	(11 kip)	(1 - 14 UNS)

		100 kN	100 kN	M27 x 2
		(22 kip)	(22 kip)	(1 - 14 UNS)

318.25	250 kN	100 kN	100 kN	M27 x 2
	(55 kip)	(22 kip)	(22 kip)	(1 - 14 UNS)

		250 kN	250 kN	M36 x 2
		(55 kip)	(55 kip)	(1 1/2 - 12 UNF)

318.50	500 kN	250 kN	250 kN	M36 x 2
	(110 kip)	(55 kip)	(55 kip)	(1 1/2 - 12 UNF)

		500 kN	500 kN	M52 x 2
		(110 kip)	(110 kip)	(2 -12 UNF)

*At 21 MPa (3000 psi)

Stiffness Data Stiffness is a way to measure the deflection of the force train. Deflection rates can 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		MODEL 318.25		MODEL 318.50
	100 KN/22 KIP		250 KN/55 KIP		500 KN/110 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

318 Load Unit

DEFLECTIONS

A - D overall frame

Spring rates

		20
	(kips)	10
	Limits	5
	Side Load	5
	Side Load	2
	Maximum	1
		1
		0.5

	MODEL 318.10		MODEL 318.25			MODEL 318.50
	100 KN/22 KIP		250 KN/55 KIP			500 KN/110 KIP
	0.38 mm	0.015 in	0.58 mm 0.023 in			0.66 mm 0.026 in
	2.6 x 108 N/m		4.3 x 108 N/m			7.5 x 108 N/m
	(1.5 x 106 lb/in)		(2.4 x 106 lb/in)			(4.3 x 106 ib/in)
	Free Column Length (cm)
25		50	125			250
							80	Maximum
							80
							45
							45
							22	Side

					318.50
					318.50			Load
								Load
	318.10			318.25			9
							9	Limits
							4.5	Limits
							4.5	(kN)
								(kN)
							2
							2
10		20	50			100
	Free Column Length (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.

		PARAMETER		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)
				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)

		Nonlinearity		0.08% of full scale
				0.15% of full scale for Models 661.22/.23/.31

		Temperature		0.004% of reading/°C (0.002%/°F)
		Usable range		-54°C (-65°F) to +121°C (+250°F)
		Compensated range		+21°C (+70°F) to +77°C (+170°F)
		Sensitivity		0.0036% of full scale/°C
				(0.0020% of full scale/°F)

		Output		2 mV/V at full-scale load

		Connector		PT02ER-10-6P


MODEL	LOAD CAPACITY		THREAD SIZE*		WEIGHT
661.11-01	250 N		M6 x 1.0 mm x 6.3 mm		0.45 kg
	(50 lbf)		(1/4 - 28 UNF x 0.25 in		(1 lb)

661.11-02	500 N		M6 x 1.0 mm x 6.3 mm		0.45 kg
	(100 lbf)		(1/4 - 28 UNF x 0.5 in		(1 lb)

661.18-01	1 kN		M12 x 1.25 mm x 25.4 mm		2.27 kg
	(220 lbf)		(1/2 - 20 UNF x 1.0 in)		(5 lb)

661.18-02	2.5 kN		M12 x 1.25 mm x 25.4 mm		2.27 kg
	(550 lbf)		(1/2 - 20 UNF x 1.0 in)		(5 lb)

661.19-01	5 kN		M12 x 1.25 mm x 25.4 mm		3.07 kg
	(550 lbf)		(1/2 - 20 UNF x 1.0 in)		(6.75 lb)

661.19-02	10 kN		M12 x 1.25 mm x 25.4 mm		3.07 kg
	(2.2 kip)		(1/2 - 20 UNF x 1.0 in)		(6.75 lb)

661.19-03	15 kN		M12 x 1.25 mm x 25.4 mm		3.07 kg
	(3.3 kip)		(1/2 - 20 UNF x 1.0 in)		(6.75 lb)

661.19-04	25 kN		M12 x 1.25 mm x 25.4 mm		3.07 kg
	(5.5 kip)		(1/2 - 20 UNF x 1.0 in)		(6.75 lb)

Introduction

318 Load Unit

MODEL	LOAD CAPACITY	THREAD SIZE*	WEIGHT
661.20-01	25 kN	M27 x 2.0 mm x 31.7 mm	9.75 kg
	(5.5 kip)	(1 - 14 UNS-3B x 1.25 in)	(21.5 lb)

661.20-02	50 kN	M27 x 2.0 mm x 31.7 mm	9.75 kg
	(11 kip)	(1 - 14 UNS-3B x 1.25 in)	(21.5 lb)

661.20-03	100 kN	M27 x 2.0 mm x 31.7 mm	9.75 kg
	(2.2 kip)	(1 - 14 UNS-3B x 1.25 in)	(21.5 lb)

661.22-01	250 kN	M36 x 2.0 mm	13.2 kg
	(3.3 kip)	(1 1/2 - 12 UNC-2B)	(29 lb)

661.23-01	500 kN	M52 x 2.0 mm x 48.3 mm	16 kg
	(5.5 kip)	(2.0 - 12 UN-2B x 1.9 in)	(35.3 lb)

661.31-01	1000 kN	M76 x 1.75 mm x 28.4 mm	49.9 kg
	(220 kip)	(2.0 - 12 UN-2B x 1.35 in)	(110 lb)

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

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

			C
A

MODEL	A	B*	C	D*	E
661.11-01	70 mm	18 mm	7 mm	38 mm	61 mm
	(2–3/4 in)	(3/4 in)	(1/4 in)	(1–1/5 in)	(2–3/8 in

661.18-01	105 mm	32 mm	7 mm	67 mm	64 mm
	(4–1/4 in)	(1–1/4 in)	(1/4 in)	(2–5/8 in)	(2–1/5 in)

661.19-01	105 mm	32 mm	7 mm	67 mm	64 mm
	(4–1/4 in)	(1–1/4 in)	(1/4 in)	(2-5/8 in)	(2–1/5 in)

661.20-01	154 mm	57 mm	10 mm	95 mm	89 mm
	(6 in)	(2–1/4 in)	(3/8 in)	(3–3/4n)	(3–1/2 in)

661.22-01	114 mm	92 mm	1 mm	203 mm	74 mm
	(4–1/2 in)	(3–5/8 in)	(>1/4 in)	(8 in)	(2–7/8 in)

661.23-01	152 mm	140 mm	N/A	203 mm	86 mm
	(6 in)	(5–1/5 in)		(8 in)	(3–3/8 in)

661.31-01	222 mm	203 mm	N/A	305 mm	124 mm
	(8–3/4 in)	(8 in)		(12 in)	(4–7/8 in)