Finetech Engineering

Shore D Hardness Tester

Overview

Shore D Hardness Tester

Finetech Engineering is a Shore D hardness tester manufacturer India based in Thane, Maharashtra. Our Shore D Hardness Tester is a durometer instrument paired with a precision test stand. It is built to measure how hard rigid plastics, hard rubber, and ebonite are – a property called indentation hardness.

Shore hardness is the fastest and most widely used method to check how hard a rubber or plastic material is. It takes less than 15 seconds per reading, needs no complicated sample preparation (just a flat surface), and gives you a clear number between 0 and 100. Zero means the material is very soft, and 100 means it is very hard.

The test works like this: a pointed tip (called an indenter) is pressed into the surface of the material under a set spring force. The depth of that indent is converted into a Shore hardness number. Shore A uses a flatter tip for soft materials. Shore D uses a sharper tip and a stronger spring – that is why it is the right choice for rigid plastics and hard rubber.

Shore A vs Shore D - Which Scale Do You Need?

Feature

Shore A

Shore D

Indenter Shape

Truncated cone, 35° angle, 0.79 mm flat tip

Sharp cone, 30° angle, 0.1 mm spherical tip

Spring Force

822 g (8.06 N) at full deflection

4536 g (44.5 N) at full deflection

Best For

Soft to medium rubber, elastomers, TPE, flexible PVC, foam, silicone

Rigid plastics, hard rubber, ebonite, thermoplastics, semi-rigid materials

Typical Materials

Natural rubber, SBR, NBR, EPDM, silicone, PU foam, TPE/TPR, soft PVC

PP, PE-HD, ABS, nylon, polycarbonate, POM, hard PVC, acrylic, polystyrene, hard rubber

Standards

ISO 868, ASTM D2240 Type A, IS 3400 Part 5

ASTM D2240 Type D, ISO 868

When to Use

When the material is soft enough to indent with your thumbnail

When Shore A reading is above 90, or when the standard specifies Shore D

Quick rule of thumb:
Typical Shore Hardness Values - Common Materials

Material

Shore A

Shore D

Notes

Soft silicone rubber

20–40

Very soft, gel-like

Rubber bands, flexible tubing

30–50

Everyday rubber

Tyre tread compound

55–75

Medium hardness NR/SBR

Shoe sole (rubber/PU)

50–80

Depends on application

EPDM gasket / seal

40–70

Varies with compound

Hard rubber / ebonite

90–100

40–70

Test both scales in this overlap zone

Polypropylene (PP)

70–80

Rigid thermoplastic

Polyethylene (HDPE)

60–70

Semi-rigid thermoplastic

ABS

75–85

Common engineering plastic

Nylon (PA6, PA66)

75–85

Engineering plastic

Polycarbonate (PC)

80–90

Tough transparent plastic

Acetal / POM

80–90

High-stiffness engineering plastic

Hard PVC (rigid)

75–85

Pipes, profiles, fittings

Specifications

Parameter

Specification

Product Name

Shore D Hardness Tester (Durometer with Test Stand)

Durometer Type

Shore D (Shore A also available separately)

Measurement Range

0–100 Shore D

Resolution

0.5 or 1 Shore unit (model-dependent)

Display

Digital LCD with peak hold function

Indenter

Hardened steel, 30° cone with 0.1 mm radius spherical tip (per ASTM D2240 Type D)

Spring Force

4536 g (44.5 N) at full deflection

Test Stand

Precision operating lever, adjustable height, perpendicular contact and consistent loading

Specimen Requirements

Minimum 6 mm thick, flat and parallel surfaces, free of texture or curvature

Standards Compliance

ASTM D2240, ISO 868, IS 3400 Part 5, DIN 53505

Calibration

Calibration blocks supplied; traceable calibration service available

Power

Battery-operated – no mains power required

Construction

Steel frame, powder coated, with durometer mounting bracket

Certification

ISO 9001:2015 certified manufacturing

Manufacturer Location

Thane, Maharashtra, India

How to Do a Shore Hardness Test (Step by Step)
Step 1: Prepare Your Sample
  • The sample must be at least 6 mm (0.25 inch) thick – you can stack layers if needed, but a single piece is best
  • The surface must be flat and smooth – no curves, bumps, or rough texture at the test point
  • For rubber: use a standard hardness button made in a Finetech hardness button mould (per ASTM D2240)
  • Let the sample sit at 23°C ±2°C for at least 1 hour before testing
Step 2: Take the Reading
  • Place the sample flat on the test stand base
  • Mount the durometer in the test stand bracket
  • Lower the lever smoothly – the indenter touches the sample surface straight down
  • Read the hardness value within 1 second of firm contact (or after 15 seconds if your standard requires it)
  • The digital display automatically saves the peak reading
Step 3: Record Your Results
  • Take at least 5 readings at different spots on the sample, at least 6 mm apart
  • Drop the highest and lowest readings
  • Report the average of the remaining readings
  • Write down: Shore scale (A or D), reading value, reading time (1s or 15s), sample description, and temperature
Applications
Industries Served
Why Choose the Finetech Shore Hardness Tester?

Test stand included – always. Many competitors sell the handheld durometer on its own and charge extra for the test stand. As a Shore D durometer with test stand India manufacturer, Finetech includes the precision test stand with every laboratory durometer – because ASTM D2240 Shore D hardness tester and ISO 868 Shore hardness tester India standards require it for valid laboratory results.

Digital display with peak hold. No analogue needle to read, no guesswork. The digital display captures the peak hardness reading automatically, so results are the same regardless of who is doing the test.

Hardness button moulds available. For rubber testing, the sample should be a standard hardness button moulded to a specific thickness. Finetech makes the hardness button mould and the hydraulic press to produce them – everything you need from one supplier.

Both Shore A and Shore D from one manufacturer. If your lab tests both rubber (Shore A) and plastics (Shore D), both instruments come from Finetech. They fit the same test stand and are calibrated and serviced by the same team – making us your single-source hardness tester for rubber and plastic India supplier.

Local support from a hardness tester manufacturer Thane Maharashtra. We are based in Thane, Maharashtra. Getting a quote, ordering spare parts, or booking a calibration check is fast and straightforward – no long waits or international shipping.

Calibration and AMC support. We supply calibration test blocks for in-house checks and offer professional traceable calibration services. AMC plans include periodic calibration checks and durometer inspection.

Related Products

Product

Why Related

Hardness Button Mould

For moulding standard hardness test buttons for rubber Shore A/D testing

Hydraulic Press

For compression moulding hardness buttons and other test specimens

Universal Testing Machine (UTM)

Complementary tensile and flexural testing

DIN Abrasion Tester

Complementary abrasion resistance testing for rubber

Compression Set Apparatus

Complementary compression set testing for rubber seals

Specimen Cutters & Moulds (Full Range)

Browse all specimen preparation equipment

Common Questions

Frequently Asked Questions

Shore hardness - also called durometer hardness - measures how much a material resists a pointed tip being pushed into its surface under a set spring force. It is the fastest and most popular way to check the hardness of rubber, elastomers, and plastics. The result is a number from 0 (very soft) to 100 (very hard).
Hand-held durometer readings are fine for a quick factory-floor check, but they do not meet laboratory standards. ASTM D2240 Shore D hardness tester manufacturer requirements and ISO 868 Shore hardness tester India both require the durometer to be applied with consistent force, straight down on the sample, with the sample on a flat, rigid surface. A hand-held test changes with the angle, speed, and pressure the person applies - so two people can get different results on the same sample. The Finetech test stand removes all of that variability, giving you repeatable, auditable results every time. That is exactly why you should use a test stand for Shore hardness testing.
Use Shore D when the material is too hard for Shore A. If your Shore A reading is consistently above 90, the Shore A scale is losing accuracy - switch to Shore D. Shore D is the standard scale for rigid plastics India (PP, ABS, nylon, polycarbonate, rigid PVC), hard rubber, and ebonite. Shore A is for soft to medium rubber and elastomers.
ASTM D2240 says the sample must be at least 6 mm (0.25 inch) thick. If your sample is thinner, stack multiple layers - but a single-piece sample of at least 6 mm is always better. For rubber, use a standard hardness button moulded in a Finetech hardness button mould.
A 1-second reading is taken right away (within 1 second of firm contact). A 15-second reading is taken after holding the indenter in contact for 15 seconds. The 15-second reading is always lower because rubber and plastic materials keep slowly deforming under the load. ASTM D2240 uses 1-second readings as the standard. Some product specs quote 15-second readings. Always check which one your standard or customer needs, and include it in your report.
Yes. Finetech supplies Shore A and Shore D calibration test blocks for checking your durometer's accuracy in-house. We also offer professional traceable calibration services with certificates - important for NABL-accredited labs.
Yes. The Finetech test stand accepts both Shore A and Shore D durometers. Just swap the durometer in the mounting bracket - no changes to the stand needed.
Shore hardness is one of the most commonly included tests in NABL accreditation scopes for rubber and plastic testing laboratories. The durometer and test stand must be calibrated with traceable standards, and the test must follow ASTM D2240 or ISO 868. Finetech provides the calibration documentation to support your NABL accreditation.
Yes. Finetech Engineering is a dedicated durometer manufacturer India and Shore hardness tester manufacturer India based in Thane, Maharashtra. We manufacture both Shore A and Shore D durometers with test stands, along with hardness button moulds, hydraulic presses, and a full range of rubber and plastic testing equipment.