258-D・258-PC
258-D・258-PC

Operation Video

  • Touchscreen

    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.

  • 258-D Safety Cover Specifications

    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.

Sample Dimension Measuring Device

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
Operation Method No.258-D: Touchscreen Operation
No.258-PC: PC Operation
Power Source Single-phase AC 100-240V, 3A, 50/60 Hz
(With safety cover: Single-phase 100-240V, 5A, 50/60 Hz)
Dimensions / Weight(Approx.) No.258-D: W1,020 × D600 × H850 mm/ 135 kg
No.258-PC: W1,020 × D350 × H850 mm/ 125 kg

Common Specifications

Standards JIS/ISO ASTM
Reference Standards JIS K 7111-1,ISO 179-1 JIS K 7110,ISO 180 ASTM D6110-10 ASTM D256-10
Testing Methods Charpy Impact Test Izod Impact Test Charpy Impact Test Izod Impact Test
Hammer Energy(J)*1 0.5, 1, 2, 4, 5 7.5, 15, 25*2 1, 2.75, 5.5, 11, 22 2.7-21.7
Anvil Spacer Required – – – –
Impact Velocity 2.9m/s(±10%) 3.8m/s(±10%) 3.5m/s(±10%) 3.46m/s 3.46m/s(3.5m/s)
Hammer Lift Angle 150°
Hammer Refer to the respective sections below for details.
Anvil Refer 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
Standard Potential Energy Impact Velocity Angle of Striking Edge Radius of Striking Edge
ISO/
JIS		 0.5J 2.9m/s(±10%) 30±1° 2.0±0.5mm
1J
2J
4J
5J
7.5J 3.8m/s(±10%)
15J
25J
ASTM 2.7-21.7J 3.46m/s 45±2° 3.17±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
Standard Potential Energy Impact Velocity Radius of Striking Edge
ISO/
JIS		 1J 3.5m/s(±10%) 0.8±0.2mm
2.75J
5.5J
11J
22J
ASTM 2.7-21.7J 3.46m/s(3.5m/s) 0.8±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
Symbol Parameter ISO/JIS ASTM
ー Parallelism between long axis of test sample and reference plane ±4/1000 ー
R2 Radius of curvature of anvils 1±0.1 mm 3.17±0.12 mm
θ2 Angle of taper of anvils 10±1 ° 0
θ3 Angle of slope of anvils 5±1 ° 0
ー Angle of supports and anvils 90±0.1 ° 90°
L Span between sample supports 62±(0.5/0) mm 101.6±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
Symbol Parameter ISO/JIS ASTM
ー Sample angle 90±2 ° ー
ー Parallelism with face of reference sample ±0.025 mm ー
P2 Horizontality of top surface of vise ±3/1000 ー
θ2 Angle between support block and top surface of vise 90±0.5 ° ー
P3 Parallelism in horizontal and vertical direction ±0.05 mm ー
R2 Top edge radius of support 0.2±0.1 mm 0.25±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.

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.

Full-Cover Specification

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

Additional Hammer Weights

Add weights to the hammer to support two capacities.

Electric Hammer Release
CSV Download Tool
Analog Angle Indicator

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For over 70 years, Yasuda Seiki’s testing machines have supported quality control and research & development across various industries, meeting the diverse needs of our clients.

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