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M10-82716-14 Issue A March 1997 Miniature Grips Low-Force Testing Operator’s Guide...
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PROPRIETARY RIGHTS NOTICE This document and the information that it contains are the property of Instron Corporation. 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 Instron Corporation.
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Preliminary Pages Amendment Incorporation Record Person Amendment Brief Description of Content ECR No. Incorporating Amendment...
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Preliminary Pages M10-82716-14 Amendment Incorporation Record Person Amendment Brief Description Of Content ECR No. Incorporating Amendment Revision Record Revision ECR No.
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Preliminary Pages 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 which are potentially hazardous, particularly the actuator in a servo- hydraulic testing system or the moving crosshead in an electromechanical testing system.
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Preliminary Pages M10-82716-14 Warning 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.
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Preliminary Pages Warning 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. Use protective shields or screens if any possibility exists of a hazard from the failure of a specimen, assembly or structure under...
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Preliminary Pages M10-82716-14 Warning Wear protective clothing when handling equipment at extremes of temperature. Materials testing is often carried out at non-ambient tem- peratures using ovens, furnaces or cryogenic chambers. Extreme temperature means an operating temperature ex- ceeding 60 °C (140 °F) or below 0 °C (32 °F). You must use protective clothing, such as gloves, when handling equipment at these temperatures.
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Preliminary Pages Warning 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.
Preliminary Pages M10-82716-14 Table of Contents (continued) Chapter Page 4 Operation (continued) Lever Action Fiber Grips 4-13 Loading Specimens 4-13 Adjusting Gripping Force 4-13 5 Maintenance Overview General Lubricating Wedge Grips 6 Illustrated Parts Overview General Wedge Grips Parts List Screw Grips Parts List Chuck Grips Parts List Lever Action Fiber Grips Parts List...
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Preliminary Pages M10-82716-14 List of Illustrations (continued) Figure Page 6-4. Lever Action Fiber Grips Parts Breakdown 6-10 6-5. Horizontal Mounting Parts 6-12...
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Preliminary Pages List of Tables 6-1. Wedge Grips Parts List 6-2. Screw Grips Parts List 6-3. Chuck Grips Parts List 6-4. Lever Action Fiber Grips Parts List 6-11...
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Chapter 1 Introduction Overview • Purpose.............Page 1-2 • About this Manual........Page 1-3 • Wedge Grips..........Page 1-5 • Screw Grips..........Page 1-7 • Chuck Grips ..........Page 1-9 • Lever-Action Fiber Grips......Page 1-11 This chapter describes several types of miniature grips designed for lightly loaded materials testing. Included is a description of the grips, their specifications, installa- tion, operation, maintenance, and, in most cases, a parts breakdown.
M10-82716-14 Purpose The four types of miniature grips covered by this manual are designed for use with Instron’s single column load frames. Their small size and low force ratings make them ideal for this application, but they are equally use- ful on Instron’s regular line of tensile testing instruments.
About this Manual About this Manual The four types of grips described are covered throughout this manual. The manual is divided into chapters cover- ing description, specifications, installation, operation, maintenance, and parts breakdown. The chapters are sub- divided into information about each type of grip. Throughout the chapters, the order of presenting the grips –...
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About this Manual M10-82716-14 Figure 1-1. Wedge Grips...
Wedge Grips Wedge Grips The Model 2716-016 and 017 wedge grips are mechani- cal wedge-action grips. The capacity of the 016 grip is 1kN (220 lb) and the capacity of the 017 grip is 2 kN (440 lb). In operation, the jaw faces that grip the test specimen are pressed together by movement of the grip body.
Screw Grips Screw Grips The Model 2710-004 side-acting screw grips are some- what similar to the Wedge Grips, except that the gripping force is supplied by two tightening knobs on the sides of the grips (see Figure 1-2). These tightening knobs are hand-operated, and the jaw faces are self-aligning, though not self-centering.
The Model 2830-001 chuck grips are lightweight three- jaw keyless chucks, similar to the type used in electric drills, that are adapted for use in Instron Type 0 grip cou- plings (see Figure 1-3). They have a soft plastic coating for easy tightening.
Lever-Action Fiber Grips Lever-Action Fiber Grips The Model 2711-006 lever-action fiber grips have two spring-loaded levers to provide clamping force on a test specimen. This action is a pincer action, and is suitable for single fiber and very fine wire specimens (see Figure 1-4).
Screw Grips M10-82716-14 Screw Grips Specifications Catalog Number 2710-004 Maximum Capacity 500 N (100 lb) Maximum Specimen 12.7 mm (0.5 in.) Size Jaw Face Size 25.4 x 25.4 mm (1 in. x 1 in.) Operating Temperature 0 to 100°C (32 to 212°F) Grip Mounting Type Type “0”, both ends Dimensions...
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Screw Grips 80 min 92.7 max All Dimensions in Millimeters Figure 2-2. Screw Grips Dimensions...
Chuck Grips M10-82716-14 Chuck Grips Specifications Catalog Number 2830-001 Maximum Capacity 500 N (100 lb) Maximum Specimen 10 mm (0.395 in.) Size Minimum Specimen 1.5 mm (0.06 in.) Size Operating Temperature 0 to 100°C (32 to 212°F) Grip Mounting Type Type “0”, both ends Dimensions See Figure 2-3.
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Chuck Grips All Dimensions in Millimeters Figure 2-3. Chuck Grips Dimensions...
Lever-Action Fiber Grips M10-82716-14 Lever-Action Fiber Grips Specifications Catalog Number 2711-006 Maximum Capacity 500 grams (1.1 lb) Maximum Specimen 2.5 mm (0.1 in.) Size (O.D.) Operating Temperature -200 to +250°F Grip Mounting Type Type “0”, both ends Dimensions See Figure 2-4. Overall Length 111 mm (4.37 in.) Effective Length...
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Lever-Action Fiber Grips All Dimensions in Millimeters Figure 2-4. Lever-Action Fiber Grips Dimensions...
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Chapter 3 Installation Overview • General .............Page 3-2 • Grip Installation ........Page 3-3 • Fiber Grips ..........Page 3-5 This chapter contains installation instructions for the four types of Grips covered by this manual. It tells how to mount the grips in the load frame, and gives installa- tion instructions specific to the type of grip.
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General M10-82716-14 General All of the grips covered in this manual have a grip attach- ment known as a Type 0 attachment. This attachment method uses a clevis arrangement that consists of a smooth stud and a mating socket, with a hole through both for a clevis pin.
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Grip Installation Grip Installation On the single column load frames, the load cell is usu- ally mounted on the crosshead, and has a grip adapter mounted to it. A second, identical grip adapter is mounted on the frame base. Since both grips in each pair of grips are also identical, it makes no difference which grip is designated as the upper or lower grip.
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Fiber Grips M10-82716-14 Fiber Grips The Fiber Grips are normally used in a vertical, or axial, orientation. In this position, better specimen alignment can be obtained and the grips do not occupy as much of the test space. In this position, however, it is slightly more difficult to to load specimens into the grips.
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Fiber Grips the bracket assembly between the jaw frames and the shaft. (f) Place the square portion of the shaft into the square cutout of the bracket mounting post. Leave approxi- mately in. clearance between the grip body and 1/32 the post (see Figure 3-3).
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Chapter 4 Operation Overview • General .............Page 4-2 • Wedge Grips..........Page 4-3 • Screw Grips..........Page 4-7 • Chuck Grips ..........Page 4-11 • Lever Action Fiber Grips ......Page 4-13 This chapter gives operating instructions for the four types of Grips. It will tell you how to load specimens into the grips, and gives any operating instructions spe- cific to the type of grip.
General M10-82716-14 General Operating instructions for the grips consist of instruc- tions for loading specimens into the grips, making any adjustments necessary, and any instructions that are unique to the specific type of grip. The following sections of this chapter describe these pro- cedures in detail.
Wedge Grips Wedge Grips Operating the wedge grips consists of installing the proper grip faces for the type of specimen you are test- ing, and loading test specimens. The following sections describe these procedures. Installing Grip Faces The grip faces, Cat. No. 2703-171 for the wedge grips have diamond shaped 45°...
Wedge Grips M10-82716-14 (e) While holding the grip faces in position, attach all four springs to the pins on the grip faces. Push the grip faces into position until they are seated in the track, if necessary, after attaching the springs. (f) Rotate the actuating thumbwheel thoughout its range to make sure the grip faces are opening and closing properly.
Screw Grips Screw Grips Operation of the screw grips consists of installing the proper grip faces for the type of specimen you will be testing, and loading test specimens. The following sec- tions describe these procedures. Installing Grip Faces There are four types of grip faces available for the Screw Grips, which are attached by means of set screws.
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Screw Grips M10-82716-14 Grip Body Grip Thumbscrew Centering Mark Socket Head Set Screws (2 Front, 2 Rear) Grip Faces Grip Thumbscrew Figure 4-2. Screw Grip Operation...
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Screw Grips to have a pair of faces of the same type in each individ- ual grip. To install these faces in the Screw Grips, perform the fol- lowing: (a) Select a type of grip face compatible with the type of specimen you will be testing.
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Screw Grips M10-82716-14 (c) Position the specimen in the lower grip so that it is in line with the upper grip, and then tighten the thumb- screws. Again, do not fully tighten yet. (d) On the upper grip, adjust the thumbscrews in or out in tandem to align the specimen with the centering mark above the opening on the body of the grip.
Chuck Grips Chuck Grips The chuck grips are lightweight three-jaw keyless chucks of a type used in electric drills. The jaws have a soft plastic coating for easy tightening. The gripping force on the specimen can be adjusted by varying the amount of twist when tightening the grips.
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Chuck Grips M10-82716-14 Hold the grip adapter with one hand while tightening the collar with the other hand to prevent twisting the load string. (f) Tighten the collar on the upper grip enough to pro- vide the necessary gripping force, as in Step (e). 4-12...
Lever-Action Fiber Grips Lever-Action Fiber Grips The lever-action fiber grips have two spring-loaded lev- ers that press the grip faces together. Squeezing the lev- ers opens the grips to allow a specimen to be inserted. When the levers are released, spring tension closes the jaws on the specimen, and the spring tension is adjust- able.
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Lever-Action Fiber Grips M10-82716-14 (b) Perform a dummy test on this specimen to see if the specimen slips in the grips. This test should approxi- mate the actual test conditions that will be performed on similar specimens. (c) If the specimen is slipping in the grips, increase the gripping force by rotating the adjusting nut, adjacent to the spring, clockwise by one or two full turns (see Figure 4-3).
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Lever-Action Fiber Grips (e) It may take several tries of adjusting the spring ten- sion and running the test in order to eliminate speci- men slippage. Again, if you are not concerned about specimen crushing, simply adjust the spring tension for a high gripping force.
Chapter 5 Maintenance Overview • General .............Page 5-2 • Lubricating Wedge Grips ......Page 5-3 This chapter gives some routine maintenance procedures for keeping your grips in top operating condition. In- cluded are general instructions for cleaning and lubrica- tion.
General M10-82716-14 General Maintenance of the four types of grips consists mainly of keeping the moving parts free of dirt and grit. Since most of the grips have some plastic parts, do not use sol- vents or harsh cleaners to clean them. The wedge grips are the only grips that require lubrica- tion.
Lubricating Wedge Grips Lubricating Wedge Grips You must lubricate the jaw faces in the wedge grips in or- der for the grips to operate smoothly and freely. You should lubricate the jaw faces whenever: • Grip faces are changed. • Grip operation becomes rough or erratic.
Chapter 6 Illustrated Parts Overview • General .............Page 6-2 • Wedge Grips Parts List ......Page 6-4 • Screw Grips Parts List ......Page 6-6 • Chuck Grips Parts List ......Page 6-8 • Lever Action Fiber Grips ......Page 6-10 This chapter gives replaceable parts information for the four types of grips covered by this manual.
To obtain quantities for a set of grips (two grips), multiply the quantity shown by 2. When ordering parts from Instron, be sure to include the catalog number of your grips, as described in Chapter 2 of this manual. This information will help Instron’s Cus- tomer Support Center to determine the correct part for your system.
Wedge Grips Parts List M10-82716-14 Wedge Grips Parts List (Not Shown) Figure 6-1. Wedge Grips Parts Breakdown...
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Wedge Grips Parts List Refer to Figure 6-1 Table 6-1. Wedge Grips Parts List Item Description Part No. Qty. Jaw Face Spring 66-1-1084 Retaining Pin, 0.62 x 0.75 in. 703D11 Jaw Actuating Plate A563-432 Body Nut T563-624 Label T563-623 Thumbwheel T563-620 Spindle T563-631...
Screw Grips Parts List M10-82716-14 Screw Grips Parts List Figure 6-2. Screw Grips Parts Breakdown...
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Screw Grips Parts List Refer to Figure 6-2 Table 6-2. Screw Grips Parts List Item Description Part No. Qty. Socket Head Set Screw, M3 x 10 401E95 Roll Pin, 3 x 24 mm 703F051 Label T563-366 Knurled Knob and Screw T563-327 Locknut T1223-1018...
Chuck Grips Parts List M10-82716-14 Chuck Grips Parts List Figure 6-3. Chuck Grips Parts Breakdown...
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Chuck Grips Parts List Refer to Figure 6-3 Table 6-3. Chuck Grips Parts List Item Description Part No. Qty. Tool Chuck, 1.5 to 10 mm, Keyless 80-54-1027 Lock Nut T1223-1018 Grip Adapter, 3/8-24 to Type “0" T563-377 Label T563-373 ACCESSORIES –...
Lever Action Fiber Grips Parts List M10-82716-14 Lever Action Fiber Grips Parts List (Inside, on shaft) Inside, next to 13 Figure 6-4. Lever Action Fiber Grips Parts Breakdown 6-10...
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Lever Action Fiber Grips Parts List Refer to Figure 6-4 Table 6-4. Lever Action Fiber Grips Parts List Item Description Part No. Qty. Jaw Face Assembly A2-189 Jaw Face Pin T2-352 Grip Frame, Right T2-761 Wedge Collar T2-339 Compression Spring, 3/8 OD 66-3-5 Spring Washer T2-348...
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Lever Action Fiber Grips Parts List M10-82716-14 Item Description Part No. Qty. Horizontal Mounting Parts consisting of: Clamp Screw T2-377 Lower Clamp Bracket Assembly A2-162 Figure 6-5. Horizontal Mounting Parts 6-12...
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