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GOST 4651 Cutting Die – Compression Prism (Type A)
Compression prism (Type A) · Compression specimen — built to GOST 4651. Hardened steel or economical ribbon steel.
Brand: Universal Grip | Model: UGC-CDH-GOST4651 / UGC-CDR-GOST4651 | ● Made to order
Cuts the GOST 4651 compression Prism (Type A) profile: length 50 ± 2 mm, width 10.0 ± 0.2 mm
Two styles: hardened steel for 0–5 mm, ribbon steel for 0–3 mm
Integral ejector (hardened) or foam pad (ribbon) pushes each specimen free
Fits manual, pneumatic and hydraulic sample-cutting presses
Free test cuts on your material before you order
Custom profiles, multi-cavity dies and nick/notch features on request
Downloads: Ribbon Steel Die Data Sheet (PDF)
Standards: GOST 4651
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Precision cutting die for GOST 4651 compression Prism (Type A) specimens
This Universal Grip die cuts the compression prism (Type A) (compression specimen) defined in GOST 4651: Plastics - Compression test method. Rectangular prisms are compressed along their length to determine compressive modulus and strength. The 50 mm prism is preferred for modulus; a shorter 10 mm prism is used for strength.
We make it in two styles so the die suits the material you cut. The one-piece hardened steel die is machined from a single piece of steel and holds its edge on rigid & semi-rigid plastics, filled compounds, rubber, sheet & film from 0 to 5 mm thick. The ribbon steel (steel-rule) die uses a precision-bent hardened rule in a laser-cut plywood base with a foam ejection pad, an economical choice for rubber, elastomers, TPE, foams, soft plastics & films up to 3 mm. Both cut the same GOST 4651 profile.
GOST 4651 specimen dimensions
The die is cut to the nominal profile in GOST 4651: length 50 ± 2 mm, width 10.0 ± 0.2 mm, thickness 4.0 ± 0.2 mm and strength specimen (Type B) length 10 ± 0.2 mm. Always check your current edition of the standard for tolerances and the test procedure.
Where it is used
Typical uses for GOST 4651 specimens include molded thermoplastics, thermoset parts, material datasheet generation and supplier qualification.
Cutting specimens with the die
Most labs run it on a manual arbor press, but it also fits pneumatic and hydraulic sample-cutting presses, and with an adapter it can cut specimens directly on a universal testing machine. Tell us your press make and model and we will match the mounting. Send us a sample of your material and we will make test cuts free of charge, so you can confirm the edge quality before you order. Hardened dies can be re-sharpened with our die sharpening tool.
GOST 4651 Cutting Die Specifications
STANDARD
GOST 4651
SPECIMEN
Compression prism (Type A)
SPECIMEN TYPE
Compression specimen
LENGTH
50 ± 2 mm
WIDTH
10.0 ± 0.2 mm
THICKNESS
4.0 ± 0.2 mm
STRENGTH SPECIMEN (TYPE B) LENGTH
10 ± 0.2 mm
HARDENED STEEL DIE
One-piece machined steel, 0–5 mm material, integral ejector plate
RIBBON STEEL DIE
Steel rule in plywood base, 0–3 mm material, foam ejection pad
PRESS COMPATIBILITY
Manual, pneumatic & hydraulic sample-cutting presses
PART NUMBERS
UGC-CDH-GOST4651 (hardened) · UGC-CDR-GOST4651 (ribbon)
Models & Options
Hardened Steel Cutting Die — One-piece machined, hardened and precision-finished; rigid & semi-rigid plastics, filled compounds, rubber, sheet & film; 0–5 mm; integral ejector plate; re-sharpenable (UGC-CDH-GOST4651)
Ribbon Steel Cutting Die — Precision-bent hardened steel rule in a laser-cut plywood base with closed-cell foam ejection pad; rubber, elastomers, TPE, foams, soft plastics & films; 0–3 mm; economical, fast turnaround (UGC-CDR-GOST4651)
Press mounting — Matched to your press make and model, or an adapter for your universal testing machine (Specify at order)
Custom features — Custom profiles, multi-cavity dies and nick/notch features on request (Custom)
What's Included
GOST 4651 cutting die in your chosen style (hardened or ribbon steel)
Specimen ejection: integral ejector plate (hardened) or foam ejection pad (ribbon)
Mounting to suit your press — tell us the make and model
Data sheet with the nominal profile dimensions
Supported Test Standards
GOST 4651 — Plastics - Compression test method
Compatible Grips & Fixtures
Arbor press — Benchtop press for cutting compression Prism (Type A) specimens with this die
Sample die press — Specimen-preparation presses and tools
Die sharpening tool — Restore the cutting edge of a hardened steel die
Plastics testing — Grips and fixtures for plastic film, sheet and molded parts
“Customer quote”
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GOST 4651 Cutting Die FAQ
What is the GOST 4651 test used for?
Rectangular prisms are compressed along their length to determine compressive modulus and strength. The 50 mm prism is preferred for modulus; a shorter 10 mm prism is used for strength.
What are the GOST 4651 specimen dimensions?
The die cuts the nominal GOST 4651 profile: length 50 ± 2 mm, width 10.0 ± 0.2 mm, thickness 4.0 ± 0.2 mm and strength specimen (Type B) length 10 ± 0.2 mm. These values come from the standard; check your current edition for tolerances.
Hardened steel or ribbon steel: which GOST 4651 die should I choose?
For rigid and semi-rigid plastics, filled compounds and sheet up to 5 mm, choose the hardened steel die. The ribbon steel die is the economical option for soft plastics and films up to 3 mm.
Which press do I need for the GOST 4651 die?
The die fits manual, pneumatic and hydraulic sample-cutting presses. On our arbor press it mounts with a lateral screw, and an adapter lets it run on a universal testing machine. Tell us your press make and model and we will match the mounting.
Can you make test cuts on my material?
Yes. Send us a sample of your sheet and we will make test cuts free of charge, so you can see the edge quality and confirm the right die style before you order.
Can you make a custom or multi-cavity GOST 4651 die?
Yes. We make custom profiles, multi-cavity dies and nick or notch features on request. Send the drawing or standard, your material and thickness, and your press model.