The Series 646 Hydraulic Collet Grips offer the best value of any fatigue testing grips available. The design of the Series 646 Grips allows for excellent repeatability from one specimen to the next, minimizing bending strains. Loading is simply a matter of sliding the specimen into the smooth collet. The Series 646 Grips are designed primarily for round specimens and are capable up to 1,000° C.
The MTS Series 646 Collet Grips offer the best value of any fatigue testing grips available. The design of the Series 646 Grips allows for excellent repeatability from one specimen to the next, minimizing bending strains. Loading is simply a matter of sliding the specimen into the smooth collet. There are no expensive threads or button ends to machine and no additional bolts or collars to install. The Series 646 Grips were designed primarily for round specimens. A special high temperature collet package is available for the 646.10 that utilizes the extension rods supplied with our Model 680 High Temperature Grips. This package will provide you with the same high-temperature capabilities as the 680 grips, and requires the same specimen adapters.
Axial Model 646 Specifications
MODEL
FORCE
TEMPERATURE
HEIGHT
DIAMETER
MOUNTING THREAD SIZE
PART NUMBER
646.10B
100 kN (22 kip)
-40°C to 65°C (-40°F to 150°F)
114 mm (4.50 in)
171 mm (6.75 in)
M27x2 (1”-14)
042-481-807
646.25B
250 kN (55 kip)
-40°C to 65°C (-40°F to 150°F)
171 mm (6.75 in)
254 mm (10.0 in)
M36x2 (1 1/2”-12)
042-481-705
Grips are sold in pairs.
Axial-Torsional Model 646 Specifications
MODEL
AXIAL FORCE
TORSIONAL FORCE
TEMPERATURE
HEIGHT
DIAMETER
MOUNTING THREAD SIZE
PART NUMBER
646.10B
100 kN (22 kip)
1100 N.m (10,000 in.lb)
-40°C to 65°C (-40°F to 150°F)
147 mm (5.8 in)
171 mm (6.75 in)
M68x2
043-816-502
646.25B
250 kN (55 kip)
2200 N.m (20,000 in.lb)
-40°C to 65°C (-40°F to 150°F)
231 mm (9.1 in)
254 mm (10.0 in)
M92x3
043-816-301
Grips are sold in pairs.
Metric Collet Sizes
GRIP MODEL
SPECIMEN TYPE
PART NUMBER
646.10-XX
Round 10 mm diameter
038-058-917
646.10-XX
Round 12 mm diameter
038-058-903
646.10-XX
Round 15 mm diameter
038-058-902
646.25-XX
Round 30 mm diameter
038-058-901
646.25-XX
Round 20 mm diameter
038-059-203
646.25-XX
Round 25 mm diameter
038-059-207
646.25-XX
Round 40 mm diameter
038-059-223
US Customary Collet Sizes
GRIP MODEL
SPECIMEN TYPE
PART NUMBER
646.10-XX
Round 0.25 in diameter
038-058-905
646.10-XX
Round 0.50 in diameter
038-058-907
646.10-XX
Round 0.75 in diameter
038-058-909
646.10-XX
Round 1.0 in diameter
038-058-908
646.25-XX
Round 1.0 in diameter
038-059-202
WATER COOLING KIT
PART NUMBER
Water Cooling Kit, with flow switches
057-697-502
Water Cooling Kit, without flow switches
057-697-505
Required for Series 647 Water Cooled Wedges
Includes 3.6 m (12 ft) of hose for connection to water source.
Attaches magnetically to load frame base or other flat steel surface.
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