UNIVERSAL ADJUSTABLE SPRING HAMMER
1. PRODUCT UNIT: 5-ENERGY UNIVERSAL SPRING HAMMER
This precision testing device, formally known as Test Ehb: Spring Hammer, is engineered to perform mechanical impact tests for the lower range of IK classifications (IK01 to IK06) from a single, adjustable unit.
Product Name: Universal Adjustable 5-Energy Spring Impact Hammer
SKU: OTY068-SH5E
Standards Applied: IEC 60068-2-75 (Test Ehb: Spring Hammer) and IEC 62262 (IK Classification).
Function: Used to verify the robustness and mechanical resistance of enclosures, operating levers, handles, and other accessible parts of electrical equipment that may receive impacts in service.
Classification Range: Suitable for testing from IK02 to IK06.
Body Dimensions: The main hammer body has a diameter of 50 mm and a total length of approximately 211 mm.
Release Mechanism: Manual cocking and push-button release mechanism. The force required to release the striking element is standardized not to exceed 10 Newtons (N).
2. ADJUSTABLE IMPACT ENERGIES AND UNCERTAINTY
The Spring Hammer provides five distinct, selectable energy levels that directly correspond to specific IK protection ratings.
Selectable Energy Levels (Joule): 0.20 J, 0.35 J, 0.50 J, 0.70 J (standard value covering the 0.75 J requirement), and 1.0 J.
Corresponding IK Ratings: IK02, IK03, IK04, IK05, and IK06.
Energy Uncertainty: The actual impact energy delivered by the hammer is precisely controlled to be within a tolerance of plus/minus 10% (+/- 10%) of the nominal value (per IEC 60068-2-75, Table 1).
3. STRIKING ELEMENT (DART) SPECIFICATIONS
The internal striking component, or dart, is standardized to ensure consistent and compliant testing.
Striking Element Mass: The effective mass of the dart is 200 grams (+/- 1 gram) across all five energy settings.
Striking Tip Material: The impact face is made of Polyamide (PA), which is the required material for low-energy spring hammer tests (IEC 60068-2-75, Figure A.1).
Tip Hardness: The Polyamide tip must have a Rockwell Hardness (HRR) in the range of 85 to 100.
Tip Geometry: The striking face is hemispherical with a radius (R) of 10 mm.
4. CALIBRATION ACCESSORY
To maintain compliance and accuracy with the IEC standard, a specific calibration device is required.
📐 Calibration Pendulum Device
Accessory SKU: OTY068-CAL-SPR
Description: This precision accessory is essential for the mandatory calibration and verification of the Spring Hammer's energy output, as detailed in Annex B of IEC 60068-2-75. The device uses a separate pendulum and measurement system to confirm that the delivered impact energy remains strictly within the plus/minus 10% tolerance of the nominal value, ensuring valid test results. This accessory is required for maintaining the conformity of the Spring Hammer.
To fully appreciate the results, it's essential to understand this test system in detail: https://www.ormity.com/post/the-spring-hammer-test-test-ehb