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Models 412 & 422 Tension Proof Testers

2017-04/422
2017-04/422-spares

Some customers demand more versatility and greater capacity—these two machines each deliver the ability to apply tensile force and clamp force independently.

  • Features separate hydraulic cylinder groups to clamp and apply tensile forces
  • Features the greatest capacity of Metriguard’s offline tension proof testers
  • Ensures conformance to tensile strength design values
  • Provides excellent quality control for MSR lumber production

Both the 412 and 422 Tension Proof Testers grip the test specimen at its ends, apply a test load by means of hydraulic cylinders, and measure the load applied. Means are provided for displaying the maximum load attained while the specimen is loaded to failure. Guards are provided to protect personnel from injury by flying pieces when the specimen fails. Convenient adjustment of test gauge length is a feature which allows testing of random material lengths.

  • Applies tensile force to verify tensile strength in dimension lumber
  • Model 412 force range to 100,000 lbs (440kN)
  • Model 422 force range to 200,000 lbs (890kN)
  • Welded steel frames hold two clamp assemblies
  • “Set end” clamp is on rollers and is easily moved by hand and pinned into position to accommodate a range of test gauge lengths.
  • “Power end” clamp moves with respect to the frame under hydraulic power to provide tensile load to the lumber.
  • Clamps open at ends to allow testing long pieces without trimming.
  • Both systems contain two sets of hydraulic cylinders, one set to provide clamping force, the other to provide tensile load.
  • Hydraulic pressure from a single electric hydraulic pump is applied to the clamps and, when sufficient clamp pressure is attained, a valve is activated and tensile force is applied.
  • Guards are provided to protect personnel from flying pieces when a test specimen fails.
  • Electronic load cell force measurement system measures and displays both applied tensile load and ultimate tensile load if lumber failure occurs.
  • Hydraulic clamping provides opportunity for independent control of clamping force.

General

Test Gauge Lengths ........................ 412: 1 to 12 ft by 1 ft steps (305 to 3658 mm by 305mm steps) 422: . 1 to 11ft by 1ft steps (305 to 3353 mm by 305 mm steps)

Maximum Tensile Force................... 412: 100,000 lb (440 kN) 422: 200,000 (880 kN)

Tensile Force Measurement ............Electronic load cell with digital readout and peak track

Tensile Force Actuation ................... 10,000 psi (69 MPa) hydraulic cylinders.

Maximum Tensile Stroke ................. 2 in (51 mm)

Clamp Force Actuation .................... 10,000 psi (69 MPa) hydraulic cylinders

Initial Clamp Force........................... Hydraulic sequence valve

Clamp Grip Length .......................... 412: 23 in (584 mm) 422: 30 in (762 mm)

Horizontal Centering in Clamps.......Provided for material widths 2.5, 3.5, 5.5, 7.25, 9.25, and 11.25 in (64, 89, 140, 184, 230, and 290 mm)

Material Feed................................... From either end of machine


 

Material Size Range

Width ............................................... 412: 2.5 in to 11.25 in (64 to 300 mm) 422: Up to 11.8 in (300 mm)

Thickness ........................................ 1.25 in to 2.75 in (32 to 69 mm). Spacer plates allow testing of material down to zero thickness

Length.............................................. 412: Greater than 70 in (1780 mm) 422: Greater than 72 in (1830 mm)

Electric Power.................................. 115 Vac 50/60 Hz single phase, 3A for electronic unit, 230 Vac 50/60 Hz single phase, 11A for hydraulic power unit

Machine Dimensions

Length.............................................. 16 ft 9 in (5110 mm)

Width ............................................... 412: 2 ft 6 in (762 mm) 422: 3 ft (914.4 mm)

Height ..............................................412:  3 ft 9 in (1143 mm) 422: 4 ft (1219 mm)

Weight ............................................. 412: 4000 lb (1800 kg) 422: 6,400 pounds (2900 kg)