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Series 646 Hydraulic Collet Grips

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.

  • Tension
  • Compression
  • High-cycle Fatigue (HCF)
  • Low-cycle Fatigue (LCF)
  • Metals
  • Polymers
  • Rubber
  • Composites
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TECHNICAL OVERVIEW

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.

HIGH TEMPERATURE PACKAGE COMPONENTS

PART NUMBER

Furnace Extension Kit for 646.10

045-337-601

Hand Pump

100-254-831

Specimen Adapters