Instron 2716-010 User manual

5kN, 30kN and 50kN Wedge Grips
Reference Manual - Equipment M10-14052-EN Revision C
The difference is measurable
®

Electromagnetic Compatibility
Where applicable, this equipment is designed to comply with International Electromagnetic
Compatibility (EMC) standards.
To ensure reproduction of this EMC performance, connect this equipment to a low impedance
ground connection. Typical suitable connections are a ground spike or the steel frame of a
building.
Proprietary Rights Notice
This document and the information that it contains are the property of Illinois Tool Works Inc.
(ITW). Rights to duplicate or otherwise copy this document and rights to disclose the document
and the information that it contains to others and the right to use the information contained
therein may be acquired only by written permission signed by a duly authorized officer of ITW.
Trademarks
Instron®is a registered trademark of Illinois Tool Works Inc. (ITW). Other names, logos, icons
and marks identifying Instron products and services referenced herein are trademarks of ITW
and may not be used without the prior written permission of ITW.
Other product and company names listed are trademarks or trade names of their respective
companies.
Original instructions
Copyright © 2003 Illinois Tool Works Inc. All rights reserved. All of the specifications shown
in this document are subject to change without notice.
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Preliminary Pages
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General Safety Precautions
Materials testing systems are potentially hazardous.
Materials testing involves inherent hazards from high forces, rapid motions, and
stored energy. You must be aware of all moving and operating components in
the testing system that are potentially hazardous, particularly force actuators or
a moving crosshead.
Carefully read all relevant manuals and observe all Warnings and Cautions. The
term Warning is used where a hazard may lead to injury or death. The term
Caution is used where a hazard may lead to damage to equipment or to loss of
data.
Instron products, to the best of its knowledge, comply with various national and
international safety standards, in as much as they apply to materials and
structural testing. We certify that our products comply with all relevant EU
directives (CE mark).
Because of the wide range of applications with which our instruments are used,
and over which we have no control, additional protection devices and operating
procedures may be necessary due to specific accident prevention regulations,
safety regulations, further EEA directives or locally valid regulations. The extent
of our delivery regarding protective devices is defined in your initial sales
quotation. We are thus free of liability in this respect.
At your request, we will gladly provide advice and quotations for additional
safety devices such as protective shielding, warning signs or methods of
restricting access to the equipment.
The following pages detail various general warnings that you must heed at all
times while using materials testing equipment. You will find more specific
Warnings and Cautions in the text whenever a potential hazard exists.
Your best safety precautions are to gain a thorough understanding of the
equipment by reading your instruction manuals and to always use good
judgement.
It is our strong recommendation that you should carry out your own product
safety risk assessment.

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4M10-14052-EN
Warnings
Hazard - Press the Emergency Stop button whenever you consider that an
unsafe condition exists.
The Emergency Stop button removes hydraulic power or electrical drive from the
testing system and brings the hazardous elements of the system to a stop as
quickly as possible. It does not isolate the system from electrical power, other
means are provided to disconnect the electrical supply. Whenever you consider
that safety may be compromised, stop the test using the Emergency Stop
button. Investigate and resolve the situation that caused the use of the
Emergency Stop button before you reset it.
Flying Debris Hazard - Make sure that test specimens are installed correctly
in grips or fixtures in order to eliminate stresses that can cause breakage of
grip jaws or fixture components.
Incorrect installation of test specimens creates stresses in grip jaws or fixture
components that can result in breakage of these components. The high
energies involved can cause the broken parts to be projected forcefully some
distance from the test area. Install specimens in the center of the grip jaws in
line with the load path. Insert specimens into the jaws by at least the amount
recommended in your grip documentation. This amount can vary between 66%
to 100% insertion depth; refer to supplied instructions for your specific grips.
Use any centering and alignment devices provided.
Hazard - Protect electrical cables from damage and inadvertent
disconnection.
The loss of controlling and feedback signals that can result from a disconnected
or damaged cable causes an open loop condition that may drive the actuator or
crosshead rapidly to its extremes of motion. Protect all electrical cables,
particularly transducer cables, from damage. Never route cables across the
floor without protection, nor suspend cables overhead under excessive strain.
Use padding to avoid chafing where cables are routed around corners or
through wall openings.

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High/Low Temperature Hazard - Wear protective clothing when handling
equipment at extremes of temperature.
Materials testing is often carried out at non-ambient temperatures using ovens,
furnaces or cryogenic chambers. Extreme temperature means an operating
temperature exceeding 60 °C (140 °F) or below 0 °C (32 °F). You must use
protective clothing, such as gloves, when handling equipment at these
temperatures. Display a warning notice concerning low or high temperature
operation whenever temperature control equipment is in use. You should note
that the hazard from extreme temperature can extend beyond the immediate
area of the test.
Crush Hazard - Take care when installing or removing a specimen,
assembly, structure, or load string component.
Installation or removal of a specimen, assembly, structure, or load string
component involves working inside the hazard area between the grips or
fixtures. When working in this area, ensure that other personnel cannot operate
any of the system controls. Keep clear of the jaws of a grip or fixture at all times.
Keep clear of the hazard area between the grips or fixtures during actuator or
crosshead movement. Ensure that all actuator or crosshead movements
necessary for installation or removal are slow and, where possible, at a low
force setting.
Hazard - Do not place a testing system off-line from computer control
without first ensuring that no actuator or crosshead movement will occur
upon transfer to manual control.
The actuator or crosshead will immediately respond to manual control settings
when the system is placed off-line from computer control. Before transferring to
manual control, make sure that the control settings are such that unexpected
actuator or crosshead movement cannot occur.
Robotic Motion Hazard - Keep clear of the operating envelope of a robotic
device unless the device is de-activated.
The robot in an automated testing system presents a hazard because its
movements are hard to predict. The robot can go instantly from a waiting state
to high speed operation in several axes of motion. During system operation,
keep away from the operating envelope of the robot. De-activate the robot
before entering the envelope for any purpose, such as reloading the specimen
magazine.
Warnings

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6M10-14052-EN
Hazard - Set the appropriate limits before performing loop tuning or running
waveforms or tests.
Operational limits are included within your testing system to suspend motion or
shut off the system when upper and/or lower bounds of actuator or crosshead
travel, or force or strain, are reached during testing. Correct setting of
operational limits by the operator, prior to testing, will reduce the risk of damage
to test article and system and associated hazard to the operator.
Electrical Hazard - Disconnect the electrical power supply before removing
the covers to electrical equipment.
Disconnect equipment from the electrical power supply before removing any
electrical safety covers or replacing fuses. Do not reconnect the power source
while the covers are removed. Refit covers as soon as possible.
Rotating Machinery Hazard - Disconnect power supplies before removing
the covers to rotating machinery.
Disconnect equipment from all power supplies before removing any cover which
gives access to rotating machinery. Do not reconnect any power supply while
the covers are removed unless you are specifically instructed to do so in the
manual. If the equipment needs to be operated to perform maintenance tasks
with the covers removed, ensure that all loose clothing, long hair, etc. is tied
back. Refit covers as soon as possible.
Hazard - Shut down the hydraulic power supply and discharge hydraulic
pressure before disconnection of any hydraulic fluid coupling.
Do not disconnect any hydraulic coupling without first shutting down the
hydraulic power supply and discharging stored pressure to zero. Tie down or
otherwise secure all pressurized hoses to prevent movement during system
operation and to prevent the hose from whipping about in the event of a
rupture.
Hazard - Shut off the supply of compressed gas and discharge residual gas
pressure before you disconnect any compressed gas coupling.
Do not release gas connections without first disconnecting the gas supply and
discharging any residual pressure to zero.
Warnings

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Explosion Hazard - Wear eye protection and use protective shields or
screens whenever any possibility exists of a hazard from the failure of a
specimen, assembly or structure under test.
Wear eye protection and use protective shields or screens whenever a risk of
injury to operators and observers exists from the failure of a test specimen,
assembly or structure, particularly where explosive disintegration may occur.
Due to the wide range of specimen materials, assemblies or structures that may
be tested, any hazard resulting from the failure of a test specimen, assembly or
structure is entirely the responsibility of the owner and the user of the
equipment.
Hazard - Ensure components of the load string are correctly pre-loaded to
minimize the risk of fatigue failure.
Dynamic systems, especially where load reversals through zero are occurring,
are at risk of fatigue cracks developing if components of the load string are not
correctly pre-loaded to one another. Apply the specified torque to all load string
fasteners and the correct setting to wedge washers or spiral washers. Visually
inspect highly stressed components such as grips and threaded adapters prior
to every fatigue test for signs of wear or fatigue damage.
Warnings

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8M10-14052-EN

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Table of Contents
Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Functional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Chapter 2: Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Grips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Jaw Faces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Chapter 3: Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Load String . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Installing the Jaw Faces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Installing the Spacers and Side Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Preloading the Load String. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Removing Preload. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

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10 M10-14052-EN
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Chapter 4: Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Installing a specimen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Removing a Specimen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Chapter 5: Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Chapter 6: Illustrated Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Finding a Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Grip Illustration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Ancillary Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Parts Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Ancillary Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

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Chapter 1
Introduction
This chapter describes the 5 kN, 30 kN, and 50 kN wedge action grips and their grip
components.
•General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
•Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
•Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
General
This manual describes the 5 kN wedge action grips, two versions of the 30 kN wedge
action grips, and the 50 kN wedge action grips. These are:
•Catalog number 2716-010 - 5 kN wedge action grips
•Catalog number 2716-015 - 30 kN wedge action grips
•Catalog number 2736-015 - High Temperature 30 kN wedge action grips
•Catalog number 2716-020 - 50 kN wedge action grips

Chapter: Introduction
12 M10-14052-EN
Purpose
Figure 1. 30 kN Wedge Grip (2716-015)
The Instron wedge action grips hold a test specimen between a stationary load frame
member and force producing crosshead or actuator.
Figure 1 shows the 2716-015 (30 kN) version of the grips. The 2716-010 (5 kN) version
looks exactly the same. The high temperature version (2736-015) is similar except that
there are four handles on each grip to facilitate tightening the grips in the confined
space of a temperature chamber. The 2716-020 (50 kN) version looks exactly the same.
The grips are for static tensile testing only. The wedge action design allows the jaw faces
to tighten onto a specimen without altering the vertical position of the faces in relation
to the specimen. This allows you to install a test specimen without exerting a tensile

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Purpose
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preload on it. A compressive test load eliminates any gripping force and causes the
specimen to slip from the grips.
The open front design of the grips lets you change jaw faces to accommodate flat, round
or different size specimens.

Chapter: Introduction
14 M10-14052-EN
Description
Figure 2. Grip Components (2716-015)

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Description
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Components
The major grip components are the body, control mechanism, faces and optional
specimen centering device. Figure 2 illustrates the grip components.
Body
The front of the alloy steel U-shaped body has a center cavity with integral wedges which
taper toward the open end. The back of the body has two angled slots.
Two screws hold a recessed side plate which overlaps each body wedge and jaw face.
Two steel pins hold the face retainer springs on the front and back of the body.
The closed end of the body has a threaded stud with a machined bore. A control nut
threads on the stud and a spindle passes through the bore. An anti-rotation pin passes
through the body and sits in the control mechanism spindle slot.
Control Mechanism
The control mechanism consists of a control nut and a spindle. The control nut threads
onto the body stud and has two horizontal handles. The thin spindle end passes through
the control nut to the body cavity. A screw attaches a bearing plate to the spindle end.
An anti-rotation pin passes through a vertical slot in the spindle shaft. The spindle shank
has a horizontal bore through which a clevis pin passes. A control nut retainer pin
passes through a smaller horizontal bore at the spindle center. A check nut attaches to
the external threads between the two horizontal bores.
Faces
A pair of tool steel, wedge-shaped jaw faces rest on the body’s integral wedges. Two
posts on each face attach springs to the body. There is a series of serrations cut into the
side of the face which contacts the specimen. Faces may be flat, for flat specimens, or
vee-shaped, for round specimens, with different grades of serrations. Faces with other
contact surfaces are also available, including rubber coated and surfalloy. An optional
specimen centering device attaches to one of the jaw faces.
Specimen Centering Device
The optional specimen centering device is a small metal block which two screws attach
to the outside of a jaw face. A knurled thumb screw secures a thin L-shaped arm which
extends outward across the face.

Chapter: Introduction
16 M10-14052-EN
Functional
Figure 3 illustrates the grip in the closed and open positions.
Figure 3. Grips in the Closed and Open Positions
Closed
Adjust the specimen centering device before you place a test specimen between the
open jaw faces. When you turn the handles to close the grip on a specimen, the screw
action of the control nut and body threads move the body away from the test specimen
and push the bearing plate against the jaw faces. The position of the faces remain
vertically fixed, relative to the specimen, because the body is moving away from the
specimen. The anti-rotation pin prevents the grip from rotating as you tighten the control
nut.

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Description
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The angle of the jaw faces and the body wedges force the faces inward on the specimen
until the face serrations bite into the specimen. The gripping force increases during a
test as the system applies more tensile force to the specimen.
Open
When you turn the control handles to open the grip, the screw action of the control nut
and body threads move the body toward the test specimen. The movement eliminates
the gripping force on the specimen and allows the four springs to retract the jaw faces
away from the specimen.

Chapter: Introduction
18 M10-14052-EN

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Chapter 2
Specifications
This chapter details the grip specifications and includes a dimensional drawing of the
grips. The chapter also includes the specifications for flat and vee jaw faces.
•Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
•Grips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
•Jaw Faces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Dimensions
Figure 4 illustrates the grip dimensions.

Chapter: Specifications
20 M10-14052-EN
Figure 4. Dimensions
Table 1. Dimensions
Designation Measurement
2716-010
(5 kN)
Value mm (in)
2716-015 & 2736-
015 (30 kN)
Value mm (in)
2716-020
(50 kN)
Value mm (in)
A Effective length 191 (7.50) 203 (8.00) 208.5 (8.22)
B Body width 144 (5.67) 144 (5.67) 160 (6.3)
C Overall width 178 (7.00) 220 (8.66) 220 (8.66)
D Shank diameter 31.75 (1.25) 31.75 (1.25) 31.75 (1.25)
E Shank coupling 12.7 (0.5) 12.7 (0.5) 12.7 (0.5)