MODEL 255 & 259 MECHANICAL CLAMP QUICK DIE CHANGE (QDC)
N118 W18251 Bunsen Drive Germantown,WI 53022 (262) 250-4410 • Fax (262) 250-4409
pfa-inc.com Copyright ©2021 PFA, Inc. All rights reserved. Reproduction or use in any manner of editorial or graphic content herein without the express written permission of PFA, Inc. is strictly prohibited. Every effort has been made to ensure the information within this publication is complete and accurate at the time of printing.
S3019 MC-255+MC-259 REV A - 2/21
TABLE OF CONTENTS 1. Mechanical 1/4 Turn Quick Set Clamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Drawing 255ARA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3. Drawing 255FRA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4. Drawing 259ARA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5. Drawing 259FRA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
pfa-inc.com MODEL 255 & 259 | MECHANICAL CLAMP | PAGE 3
MECHANICAL 1/4 TURN
QUICK SET CLAMPS
WHEN TO USE QUICK SET CLAMPS:
O P T I O N S A N D F E AT U R E S :
Use mechanical quick set clamps with dies having slotted die plates and enough over slot clearance for the set clamp body. U-Slot brackets or ears may also be added to the dies or a heel block added to the back of the clamp for some applications.
ARA vs. FRA. Free Rotation (FRA) clamps use standard threaded bolts, while Anti-Rotation (ARA) models use modified threads to prevent the clamping plate from spinning about the bolt.
HOW THEY WORK:
To use, move clamp into position and manually hand tighten nut using the large diameter knurled surface. Use a wrench to torque to the desired preload. The large bronze alloy nut acts as an easy turning, anti-galling, large surface thrust bearing arrangement for superior performance. Model 255 clamps require approximately 125 ft.-lbs. of torque to preload the clamp to 10,000 lbs. clamping force. Model 259 clamps require approximately 350 ft.-lbs. to preload clamp to 20,000 lbs. clamping force (unlubricated threads). Clamp preload should be limited to 20,000 lbs. and 40,000 lbs. respectively.
TSB vs. STN. Forged T-Slot Bolts (TSB) are standard for production units. In the case where a larger than standard clamp range is desired, the stud and T-Nut option (STN) is available. HB Option. In cases where customers desire to use the clamp in applications without slotted die plates, a heel block may be added to the clamp to support the back of the clamp. (Clamping force is 50% of rating.) For this option specify HBX.XX at the end of the part number. (X.XX = clamping plate height in inches.) Nut Retention Option. In cases where customer desires to prevent the nut from coming off the bolt. A stop mechanism is added to the top of the bolt. Use TSL in place of TSB in the part number for this option.
pfa-inc.com MODEL 255 & 259 | MECHANICAL CLAMP | PAGE 4
STANDARD PFA CONFIGURATIONS Model 255 clamps are designed for 3/4” T-Slots and Model 259 for 1” T-Slots. The part number references the “bolt length”, which is not the clamping height, but rather the complete length of the bolt. The charts show nominal clamping height for standard T-Slots. The bolt length can be selected for the part number below.
Clamp Range B* Model 255 (Standard 3/4” Slot) TSB Nominal Clamp Height** Min Max
A+B* Min
Max
C
D
E
3.50 1.25
0-1
0”
1.125”
.75”
2.0”
2.5”
4.0”
Knurled
1-2
.875”
2.125”
1.75”
3.0”
2.5”
5.0”
Sure Grip Profile
2-3
1.875” 3.125”
2.75”
4.0”
2.5”
6.0”
2 1/2 - 4
2.375” 4.125”
3.25”
5.0”
3.0”
7.0”
3-5
2.875” 5.125”
3.75”
6.0”
3.5”
8.0”
3 1/2 - 6
3.375” 6.125”
4.25”
7.0”
4.0”
9.0”
Model 259 TSB Nominal Clamp Height**
Clamp Range B* (Standard 1” Slot)
2.0”
C D
Top of Die Underplate
E B
Forged T-slot Bolt 125,000 PSI Tensile
Ram or Bolster Surface
A+B*
Min
Max
Min
Max
0 - 1/2
0”
.6”
.75”
3/4 - 1 1/2
.75”
1.6”
1 3/4 - 2 1/2
1.75”
2 1/4 - 3 1/2
C
D
E
T-slot neck depth
1.6”
2.5”
4.0”
Bottom of T-slot
1.75”
2.6”
2.5”
5.0”
2.6”
2.75”
3.6”
2.5”
6.0”
2.25”
3.6”
3.25”
4.6”
3.0”
7.0”
2 3/4 - 4 1/2
2.75”
4.6”
3.75”
5.6”
3.5”
8.0”
3 1/4 - 5 1/2
3.25”
5.6”
4.25”
6.6”
4.0”
9.0”
2.4”
A
Large T Surface DIMENSIONS ARE IN INCHES
A
* T-Slot neck height (dimension A) is assumed to be .875” for 3/4” slots and 1” for 1” slot. ** TSL Style with retaining ring incure a 1/4” reduction in maximum clamp height.
B Clamps are provided with T-Slot Bolt (A) or Fully Threaded Stud and T-Nut (B), depending on availability.
Suffix - STN may replace - TSB if fully threaded stock and T-Nut is cleared for no minimum clamping heights. Maximum clamping height for STN is calculated as follows: Model 255 BMAX = E - 3.25 Model 259 BMAX = E - 4.00
pfa-inc.com MODEL 255 & 259 | MECHANICAL CLAMP | PAGE 5
CONFIDENTIAL: The information shown on this sheet is confidential. Permission to use, reproduce or transmit in any way not specifically authorized is expressly withheld.
DISCLAIMER: Illustrative drawings, CAD models, and information described herein is proprietary intellectual property of PFA, Inc., accurate to the company’s knowledge at time of printing, and intended for reference only. Specifications are subject to change without notice. If the information obtained from this document is critical to a specific application, it should be confirmed by contacting PFA, Inc. PFA Terms of Sale apply.
T-SLOT BOLT CHART
E BOLT LENGTH 4 5 6 7 8 9
D THREAD LENGTH 2.5 2.5 2.5 3.0 3.5 4.0
A+B DIM. RANGE MIN. MAX. .75 2.0 1.75 3.0 2.75 4.0 3.25 5.0 3.75 6.0 4.25 7.0
3.50 1.25 4
8. MAKE SURE DIE SLOTS ARE SUITABLE FOR CLAMPS. DO NOT EXCEED MIS-ALIGNMENT SHOWN. 7. MAXIMUM RECOMMENDED CLAMP PRE-LOAD IS 20,000 LBS. (10 TONS). WHEN NUT AND BOLT THREADS ARE DRY (UNLUBRICATED), A TORQUE OF ABOUT 125 FOOT POUNDS IS REQUIRED TO ACHIEVE 10,000 LBS. OF CLAMP PRE-LOAD. MAX. LOAD APPLIED TO CLAMP DURING PRODUCTION MUST NOT EXCEED CLAMP PRE-LOAD. 6. WHEN CLAMPING THE DIE, ENSURE THAT THE END OF THE T-BOLT IS EITHER FLUSH WITH OR PROTRUDING ABOVE THE NUT AS SHOWN. IF GREATER CLAMPING RANGE IS REQUIRED, A FULLY THREADED STUD AND T-NUT ARE AVAILABLE, REPLACE "TSB" WITH "STN" IN PART NUMBER. 5. REQUIRED T-BOLT LENGTH DEPENDS ON T-SLOT NECK DEPTH AND DIE SHOE THICKNESS, SHOWN AS DIMENSIONS 'A' AND 'B' IN THE ILLUSTRATION. USING THE MIN./MAX. VALUES ON THE T-SLOT BOLT CHART, DETERMINE THE A + B DIMENSION RANGE WHICH FITS THE APPLICATION REQUIREMENT. THE TOTAL BOLT LENGTHS 'E' ARE SHOWN ON THE LEFT SIDE OF THE CHART. EXAMPLE: 'A' DIM IS .75", 'B' DIM IS 1.25", SUM = 2.00". SELECT THE 5" BOLT. IF THE A + B DIMENSION VARIATION BETWEEN DIES EXCEEDS THE MAX. RANGE FOR THE AVAILABLE T-SLOT BOLTS (TSB), THEN A FULLY THREADED STUD AND T-NUT (STN) CAN BE SPECIFIED. 4. CLAMP IS FURNISHED WITH A INTEGRATED 'SURE GRIP' PROFILE FOR EASY HANDLING. 3. THE CUSTOM MADE NUT PROVIDES A LARGE SURFACE THRUST BEARING AND ALLOWS GREATER HAND PRE-TENSIONING USING THE KNURLED SURFACE OF THE NUT. A WRENCH IS USED TO TORQUE TO REQUIRED CLAMP PRE-LOAD NOT TO EXCEED 20,000 LBS. 2. AN ANTI-ROTATION (AR) FEATURE KEEPS THE T-SLOT BOLT ALIGNED WITH THE BODY OF THE CLAMP FOR EASE OF INSERTION INTO THE T-SLOT. IF A FREELY ROTATING CLAMP IS PREFERRED, SEE DWG 255FRA. 1. THE MODEL 255ARA IS A QUICK SET MECHANICAL DIE CLAMP. THE HEAVY DUTY CLAMP BODY AND THE 3/4-10 T-SLOT BOLT OF SPECIFIED LENGTH ARE ASSEMBLED TO AVOID LOSS OF COMPONENTS. USE WITH DIES HAVING U-SLOTS, POCKETS OR 'EARS' WHICH PROVIDE ADEQUATE CLAMP ENGAGEMENT. NOTES: UNLESS OTHERWISE SPECIFIED
6 THIS VIEW ILLUSTRATES THE FULLY THREADED STUD WITH T-NUT OPTION (STN)
2.50 1.25
8 DASHED LINES SHOW MAX. SLOT WIDTH OF 1.25 AT MAXIMUM OFFSET TO T-SLOT. MAKE CERTAIN THAT CLAMP IS SUPPORTED ON BOTH SIDES. 1 1/4 HEX
1.62 MIN. U-SLOT ENGAGEMENT 3
KNURLED SURFACE
6
2.00
4
D
TOP OF DIE UNDERPLATE
E
B
RAM OR BOLSTER SURFACE T-SLOT NECK DEPTH
A
BOTTOM OF T-SLOT LARGE T-SURFACE
MODEL 255 QUICK SET DIE CLAMP 255ARA
PAGE 1 OF 1
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N118 W18251 Bunsen Drive, Germantown, WI 53022 | 262.250.4410 | pfa-inc.com
CONFIDENTIAL: The information shown on this sheet is confidential. Permission to use, reproduce or transmit in any way not specifically authorized is expressly withheld.
DISCLAIMER: Illustrative drawings, CAD models, and information described herein is proprietary intellectual property of PFA, Inc., accurate to the company’s knowledge at time of printing, and intended for reference only. Specifications are subject to change without notice. If the information obtained from this document is critical to a specific application, it should be confirmed by contacting PFA, Inc. PFA Terms of Sale apply.
T-SLOT BOLT CHART
E BOLT LENGTH 4 5 6 7 8 9
D THREAD LENGTH 2.5 2.5 2.5 3.0 3.5 4.0
A+B DIM. RANGE MIN. MAX. .75 2.0 1.75 3.0 2.75 4.0 3.25 5.0 3.75 6.0 4.25 7.0
3.50 1.25 4
8. MAKE SURE DIE SLOTS ARE SUITABLE FOR CLAMPS. DO NOT EXCEED MIS-ALIGNMENT SHOWN. 7. MAXIMUM RECOMMENDED CLAMP PRE-LOAD IS 20,000 LBS. (10 TONS). WHEN NUT AND BOLT THREADS ARE DRY (UNLUBRICATED), A TORQUE OF ABOUT 125 FOOT POUNDS IS REQUIRED TO ACHIEVE 10,000 LBS. OF CLAMP PRE-LOAD. MAX. LOAD APPLIED TO CLAMP DURING PRODUCTION MUST NOT EXCEED CLAMP PRE-LOAD. 6. WHEN CLAMPING THE DIE, ENSURE THAT THE END OF THE T-BOLT IS EITHER FLUSH WITH OR PROTRUDING ABOVE THE NUT AS SHOWN. IF GREATER CLAMPING RANGE IS REQUIRED, A FULLY THREADED STUD AND T-NUT ARE AVAILABLE, REPLACE "TSB" WITH "STN" IN PART NUMBER. 5. REQUIRED T-BOLT LENGTH DEPENDS ON T-SLOT NECK DEPTH AND DIE SHOE THICKNESS, SHOWN AS DIMENSIONS 'A' AND 'B' IN THE ILLUSTRATION. USING THE MIN./MAX. VALUES ON THE T-SLOT BOLT CHART, DETERMINE THE A + B DIMENSION RANGE WHICH FITS THE APPLICATION REQUIREMENT. THE TOTAL BOLT LENGTHS 'E' ARE SHOWN ON THE LEFT SIDE OF THE CHART. EXAMPLE: 'A' DIM IS .75", 'B' DIM IS 1.25", SUM = 2.00". SELECT THE 5" BOLT. IF THE A + B DIMENSION VARIATION BETWEEN DIES EXCEEDS THE MAX. RANGE FOR THE AVAILABLE T-SLOT BOLTS (TSB), THEN A FULLY THREADED STUD AND T-NUT (STN) CAN BE SPECIFIED. 4. CLAMP IS FURNISHED WITH A INTEGRATED 'SURE GRIP' PROFILE FOR EASY HANDLING. 3. THE CUSTOM MADE NUT PROVIDES A LARGE SURFACE THRUST BEARING AND ALLOWS GREATER HAND PRE-TENSIONING USING THE KNURLED SURFACE OF THE NUT. A WRENCH IS USED TO TORQUE TO REQUIRED CLAMP PRE-LOAD NOT TO EXCEED 20,000 LBS. 2. THE NUT 3 AND THE T-SLOT BOLT MAY BE ROTATED FREELY TO ADJUST THE CLAMPING HEIGHT. IF BOLT/CLAMP ANTI-ROTATION (AR) FEATURE IS PREFERRED FOR T-SLOT BOLT ALIGNMENT, SEE DWG 255ARA. 1. THE MODEL 255FRA IS A QUICK SET MECHANICAL DIE CLAMP. THE HEAVY DUTY CLAMP BODY AND THE 3/4-10 T-SLOT BOLT OF SPECIFIED LENGTH ARE ASSEMBLED TO AVOID LOSS OF COMPONENTS. USE WITH DIES HAVING U-SLOTS, POCKETS OR 'EARS' WHICH PROVIDE ADEQUATE CLAMP ENGAGEMENT. NOTES: UNLESS OTHERWISE SPECIFIED
6 THIS VIEW ILLUSTRATES THE FULLY THREADED STUD WITH T-NUT OPTION (STN)
2.50 1.25
8 DASHED LINES SHOW MAX. SLOT WIDTH OF 1.25 AT MAXIMUM OFFSET TO T-SLOT. MAKE CERTAIN THAT CLAMP IS SUPPORTED ON BOTH SIDES. 1 1/4 HEX
1.62 MIN. U-SLOT ENGAGEMENT 3
KNURLED SURFACE
6
2.00
4
D
TOP OF DIE UNDERPLATE
E
B
RAM OR BOLSTER SURFACE T-SLOT NECK DEPTH
A
BOTTOM OF T-SLOT LARGE T-SURFACE
MODEL 255 QUICK SET DIE CLAMP 255FRA
PAGE 1 OF 1
REV -
N118 W18251 Bunsen Drive, Germantown, WI 53022 | 262.250.4410 | pfa-inc.com
CONFIDENTIAL: The information shown on this sheet is confidential. Permission to use, reproduce or transmit in any way not specifically authorized is expressly withheld.
DISCLAIMER: Illustrative drawings, CAD models, and information described herein is proprietary intellectual property of PFA, Inc., accurate to the company’s knowledge at time of printing, and intended for reference only. Specifications are subject to change without notice. If the information obtained from this document is critical to a specific application, it should be confirmed by contacting PFA, Inc. PFA Terms of Sale apply.
T-SLOT BOLT CHART
E BOLT LENGTH 4 5 6 7 8 9
D THREAD LENGTH 2.5 2.5 2.5 3.0 3.5 4.0
A+B DIM RANGE MIN. MAX. .75 1.6 1.75 2.6 2.75 3.6 3.25 4.6 3.75 5.6 4.25 6.6
3.50
4
1.25
8 DASHED LINES SHOW MAX. DIE SLOT WIDTH OF 1.50 AT MAXIMUM OFFSET TO T-SLOT. MAKE CERTAIN THAT CLAMP IS SUPPORTED ON BOTH SIDES.
2.50 1.50
6 THIS VIEW ILLUSTRATES THE FULLY THREADED STUD WITH T-NUT OPTION (STN)
1.62 MIN. U-SLOT ENGAGEMENT
8. MAKE SURE DIE SLOTS ARE SUITABLE FOR CLAMPS. DO NOT EXCEED MIS-ALIGNMENT SHOWN. 7. MAXIMUM RECOMMENDED CLAMP PRE-LOAD IS 40,000 LBS. (20 TONS). WHEN NUT AND BOLT THREADS ARE DRY (UNLUBRICATED), A TORQUE OF ABOUT 350 FOOT POUNDS IS REQUIRED TO ACHIEVE 20,000 LBS. OF CLAMP PRE-LOAD. MAX. LOAD APPLIED TO CLAMP DURING PRODUCTION MUST NOT EXCEED CLAMP PRE-LOAD. 6. WHEN CLAMPING THE DIE, ENSURE THAT THE END OF THE T-BOLT IS EITHER FLUSH WITH OR PROTRUDING ABOVE NUT AS SHOWN. IF GREATER CLAMPING RANGE IS REQUIRED, A FULLY THREADED STUD AND T-NUT ARE AVAILABLE, REPLACE "TSB" WITH "STN" IN PART NUMBER. 5. REQUIRED T-BOLT LENGTH DEPENDS ON T-SLOT NECK DEPTH AND DIE SHOE THICKNESS, SHOWN AS DIMENSIONS 'A' AND 'B' IN THE ILLUSTRATION. USING THE MIN./MAX. VALUES ON THE T-SLOT BOLT CHART, DETERMINE THE A + B DIMENSION RANGE WHICH FITS THE APPLICATION REQUIREMENT. THE TOTAL BOLT LENGTHS 'E' ARE SHOWN ON THE LEFT SIDE OF THE CHART. EXAMPLE: 'A' DIM IS .75", 'B' DIM IS 1.25", SUM = 2.00". SELECT THE 5" BOLT. IF THE A + B DIMENSION VARIATION BETWEEN DIES EXCEEDS THE MAX. RANGE FOR THE AVAILABLE T-SLOT BOLTS (TSB), THEN A FULLY THREADED STUD AND T-NUT (STN) CAN BE SPECIFIED. 4. CLAMP IS FURNISHED WITH A INTEGRATED 'SURE GRIP' PROFILE FOR EASY HANDLING. 3. A CUSTOM MADE NUT PROVIDES A LARGE SURFACE THRUST BEARING AND ALLOWS GREATER HAND PRE-TENSIONING USING THE KNURLED SURFACE OF THE NUT. A WRENCH IS USED TO TORQUE TO REQUIRED CLAMP PRE-LOAD NOT TO EXCEED 40,000 LBS. 2. AN ANTI-ROTATION (AR) FEATURE KEEPS THE T-SLOT BOLT ALIGNED WITH THE CLAMP BODY FOR EASE OF INSERTION INTO THE T-SLOT. IF A FREELY ROTATING CLAMP IS PREFERRED, SEE DWG 259FRA. 1. THE MODEL 259ARA IS A QUICK SET MECHANICAL DIE CLAMP. THE HEAVY DUTY CLAMP BODY AND THE 1"-8 T-SLOT BOLT OF SPECIFIED LENGTH ARE ASSEMBLED TO AVOID LOSS OF COMPONENTS. USE WITH DIES HAVING U-SLOTS, POCKETS OR 'EARS' WHICH PROVIDE ADEQUATE CLAMP ENGAGEMENT.
NOTES: UNLESS OTHERWISE SPECIFIED
3
6
1 1/4 HEX KNURLED SURFACE
2.40 D E
TOP OF DIE UNDERPLATE B
RAM OR BOLSTER SURFACE
A
T-SLOT NECK DEPTH BOTTOM OF T-SLOT
LARGE T-SURFACE
MODEL 259 QUICK SET DIE CLAMP 259ARA
PAGE 1 OF 1
REV -
N118 W18251 Bunsen Drive, Germantown, WI 53022 | 262.250.4410 | pfa-inc.com
CONFIDENTIAL: The information shown on this sheet is confidential. Permission to use, reproduce or transmit in any way not specifically authorized is expressly withheld.
DISCLAIMER: Illustrative drawings, CAD models, and information described herein is proprietary intellectual property of PFA, Inc., accurate to the company’s knowledge at time of printing, and intended for reference only. Specifications are subject to change without notice. If the information obtained from this document is critical to a specific application, it should be confirmed by contacting PFA, Inc. PFA Terms of Sale apply.
T-SLOT BOLT CHART
E BOLT LENGTH 4 5 6 7 8 9
D THREAD LENGTH 2.5 2.5 2.5 3.0 3.5 4.0
A+B DIM RANGE MIN. MAX. .75 1.6 1.75 2.6 2.75 3.6 3.25 4.6 3.75 5.6 4.25 6.6
3.50 1.25
4
8 DASHED LINES ILLUSTRATE MAX. DIE SLOT WIDTH OF 1.50 AT MAXIMUM OFFSET TO T-SLOT. MAKE CERTAIN THAT CLAMP IS SUPPORTED ON BOTH SIDES.
2.50 1.50
6 THIS VIEW ILLUSTRATES THE FULLY THREADED STUD WITH T-NUT OPTION (STN) 8. MAKE SURE DIE SLOTS ARE SUITABLE FOR CLAMPS. DO NOT EXCEED MIS-ALIGNMENT SHOWN. 7. MAXIMUM RECOMMENDED CLAMP PRE-LOAD IS 40,000 LBS. (20 TONS). WHEN NUT AND BOLT THREADS ARE DRY (UNLUBRICATED), A TORQUE OF ABOUT 350 FOOT POUNDS IS REQUIRED TO ACHIEVE 20,000 LBS. OF CLAMP PRE-LOAD. MAX. LOAD APPLIED TO CLAMP DURING PRODUCTION MUST NOT EXCEED CLAMP PRE-LOAD.
1.62 MIN. U-SLOT ENGAGEMENT
1 1/4 HEX
3
KNURLED SURFACE
6
2.40 D
6. WHEN CLAMPING THE DIE, ENSURE THAT THE END OF THE T-BOLT IS EITHER FLUSH WITH OR PROTRUDING ABOVE NUT AS SHOWN. IF GREATER CLAMPING RANGE IS REQUIRED, A FULLY THREADED STUD AND T-NUT ARE AVAILABLE, REPLACE "TSB" WITH "STN" IN PART NUMBER. 5. REQUIRED T-BOLT LENGTH DEPENDS ON T-SLOT NECK DEPTH AND DIE SHOE THICKNESS, SHOWN AS DIMENSIONS 'A' AND 'B' IN THE ILLUSTRATION. USING THE MIN./MAX. VALUES ON THE T-SLOT BOLT CHART, DETERMINE THE A + B DIMENSION RANGE WHICH FITS THE APPLICATION REQUIREMENT. THE TOTAL BOLT LENGTHS 'E' ARE SHOWN ON THE LEFT SIDE OF THE CHART. EXAMPLE: 'A' DIM IS .75", 'B' DIM IS 1.25", SUM = 2.00". SELECT THE 5" BOLT. IF THE A + B DIMENSION VARIATION BETWEEN DIES EXCEEDS THE MAX. RANGE FOR THE AVAILABLE T-SLOT BOLTS (TSB), THEN A FULLY THREADED STUD AND T-NUT (STN) CAN BE SPECIFIED. 4. CLAMP IS FURNISHED WITH A INTEGRATED 'SURE GRIP' PROFILE FOR EASY HANDLING. 3. A CUSTOM MADE NUT PROVIDES A LARGE SURFACE THRUST BEARING AND ALLOWS GREATER HAND PRE-TENSIONING USING THE KNURLED SURFACE OF THE NUT. A WRENCH IS USED TO TORQUE TO REQUIRED CLAMP PRE-LOAD NOT TO EXCEED 40,000 LBS. 2. THE NUT 3 AND THE T-SLOT BOLT MAY BE ROTATED FREELY TO ADJUST CLAMPING HEIGHT. IF BOLT/CLAMP BODY ANTI-ROTATION (AR) FEATURE IS PREFERRED FOR T-SLOT BOLT ALIGNMENT, SEE DWG 259ARA. 1. THE MODEL 259FRA IS A QUICK SET MECHANICAL DIE CLAMP. THE HEAVY DUTY CLAMP BODY AND THE 1"-8 T-SLOT BOLT OF SPECIFIED LENGTH ARE ASSEMBLED TO AVOID LOSS OF COMPONENTS. USE WITH DIES HAVING U-SLOTS, POCKETS OR 'EARS' WHICH PROVIDE ADEQUATE CLAMP ENGAGEMENT.
NOTES: UNLESS OTHERWISE SPECIFIED
E TOP OF DIE UNDERPLATE B
RAM OR BOLSTER SURFACE
A
T-SLOT NECK DEPTH BOTTOM OF T-SLOT
LARGE T-SURFACE
MODEL 259 QUICK SET DIE CLAMP 259FRA
PAGE 1 OF 1
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N118 W18251 Bunsen Drive, Germantown, WI 53022 | 262.250.4410 | pfa-inc.com
N118 W18251 Bunsen Drive Germantown,WI 53022 (262) 250-4410 • Fax (262) 250-4409
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