258-D IMPACT TESTER

No.258-D / No.258-PC
IMPACT TESTER  (DIGITAL)

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Overview of IMPACT TESTER (DIGITAL)

This is a pendulum impact tester designed to evaluate the impact resistance and toughness of plastics. This model is a simple, manual type that is ideal for daily quality control operations. By simply replacing the impact hammer and anvil (clamping block), it allows for smooth transition between both “Charpy” and “Izod” impact tests with a single machine.

Charpy and Izod Impact Tests

Operation Video

Features

Simplest and Easily Operated

Simplest and Easily Operated

Smooth Testing Experience

The lift-up angle of the hammer after impact is automatically measured, and the impact energy is calculated. Operation methods can be selected from touchscreen control (Model No.258-D) or PC control (Model No.258-PC).
The No.258-D model was updated with new software in 2024, significantly improving operability and user experience.

*Option

Safety Cover Specifications

Full-Cover Specification

The testing area can be completely enclosed with a safety cover, ensuring both the hammer does not come into contact with the operator and preventing test sample scatter. Hammer release and other operations can be performed via the touchscreen.

Safety Cover Specifications
Input Tools for Increased Efficiency

Input Tools for Increased Efficiency

We offer three types of input tools that simplify sample dimension measurement. These tools significantly reduce measurement time and improve testing efficiency.

View Details

Specification

Operation MethodNo.258-D: Touchscreen Operation
No.258-PC: PC Operation
Dimensions (Approx.)258-D: W500 (+W520 mm with side guards)×D650×H880 mm,
258-PC: W500 (+W520 mm with side guards)×D530×H880 mm,
Safety cover (full cover) specification: W1,000×D550×H1,120 mm
Weight (Approx.)258-D/PC: 150 kg (+5 kg with side guards) ,
Safety cover (full cover) specification: 180 kg
Power SourceAC 100 V 1-phase 3 A 50/60 Hz,
Safety cover (full cover) specification: AC 100 V 5 A 50/60 Hz
Standard accessoriesTools and equipments for basic installation(includes anvil, hammer level checking tool, sample centering tool*, hex keys, etc.)
* For ASTM Izod impact test, each sample thickness requires its own sample centering tool.

Common specifications

StandardsJIS/ISOASTM
Reference StandardsJIS K 7111-1,ISO 179-1JIS K 7110,ISO 180ASTM D6110-10ASTM D256
Test MethodCharpy Impact TestIzod Impact TestCharpy Impact TestIzod Impact Test
Hammer Energy Capacity (J)*10.5, 1, 2, 4, 57.5, 15, 25*21, 2.75, 5.5, 11, 222.7 and above (past results: 0.5, 1, 2, 4, 5, 7.5, 15, 25)2.7 to 21.7 (past results: 1, 2.75, 5.5, 11, 22)
Anvil Lift for CharpyRequired––––
Impact Velocity2.9m/s3.8m/s3.5m/s3.46m/s3.5m/s
Hammer Release Angle150°
HammerRefer to the respective sections below for details.
AnvilRefer to the respective sections below for details.
*1 Hammer capacities other than the standard options can also be manufactured. Please inquire if hammers in kgf·cm units are required.
*2 Hammers with a capacity of 50 J are not available.

Hammer

Charpy Hammers

Charpy Hammers
StandardPotential EnergyImpact VelocityAngle of Striking EdgeRadius of Striking Edge
ISO/JIS0.5J2.9m/s30±1°R2±0.5mm
1J
2J
4J
5J
7.5J3.8m/s
15J
25J
ASTM2.7 and above (past results: 0.5, 1, 2, 4, 5, 7.5, 15, 25)3.46m/sR3.17±0.12mm

The characteristics of the Charpy hammers differ between the test standards as shown in the table above. In ISO and JIS standards, the hammer length changes according to the impact velocity. Therefore, the same hammer cannot be used to create, for example, a 4 J impact and 7.5 J impact. Two different hammers must be prepared.

Izod Hammers

Izod Hammers
StandardPotential EnergyImpact VelocityRadius of Striking Edge
ISO/
JIS		1J3.5m/sR0.8±0.2mm
2.75J
5.5J
11J
22J
ASTM2.7-21.7J3.5m/sR0.8±0.2mm

The same hammer is sometimes used between ISO (or JIS) and ASTM impact tests as the details of the hammers specified in the two standards are similar. However, to be precise, the shape of the striking edge differs between the standards as shown in the above image. Therefore, to conform to the test standards, hammers that match the test standard shall be used.

Anvil

Charpy Anvil

Charpy Anvil
SymbolParameterISO/JISASTM
ーParallelism between long axis of test sample and reference plane±4/1000ー
R2Radius of curvature of anvils1±0.1 mm3.17±0.12 mm
θ2Angle of taper of anvils10±1 °0
θ3Angle of slope of anvils5±1 °0
ーAngle of supports and anvils90±0.1 °90°
LSpan between sample supports62±(0.5/0) mm101.6±0.5 mm

The shape of the anvil differs between ISO (or JIS) and ASTM standards. Therefore, to perform both ISO and ASTM standardized tests, two different anvils shall be prepared.

Izod Anvil

Izod Anvil
SymbolParameterJIS/ISOASTM
ーSample angle90±2 °ー
ーParallelism with face of reference sample±0.025 mmー
P2Horizontality of top surface of vise±3/1000ー
θ2Angle between support block and top surface of vise90±0.5 °ー
P3Parallelism in horizontal and vertical direction±0.05 mmー
R2Top edge radius of support0.2±0.1 mm0.25±0.12 mm

In strict terms the anvil shapes differ between ISO (JIS) and ASTM standards, but are sometimes used mutually as the differences are minor.

Options of IMPACT TESTER (DIGITAL)

Sample Dimensioning Tool (Micrometer/Digital Gauge Type)

Send measured dimensions to the main unit at the press of a button, reducing the time and effort required to input dimensions manually.
*Compatible with No.258-D and No.258-L. Please consult for No.258-PC.

Safety Cover (full cover)

Completely encloses the testing area, ensuring safe operation and preventing sample scatter. Hammer release is controlled via the touchscreen.

Hammer Weight Set

Add weights to the hammer to support two capacities.

Electric Hammer Release

CSV File Output*, Built-in Printer

* Available for model 258-D only.

Analog Angle Indicator

Side Guards

hammer brake

* An air source of 0.5 MPa and above is required.

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