LHT-200 Series Impact Devices

LHT-200 Series Impact Devices

LHT-200 Series Impact Devices

• Impact devices to suit LHT-200 series hardness testers
• Expand testing capabilities of your LHT-200 hardness tester
• Available as D, C, DL, DC and G type LEEB impact device.

Availability: In stock, Ships within 1 business day


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To utilise the wide testing abilities of the Starr Instruments LHT-200 series Hardness Testers, it is possible to use different types of impact devices. 

These various impact devices allow for different hardness, thickness, material and surface roughness. Also we have an option for hard to reach locations and confined spaces.

The standard supply is a D-Type Impact device. 

These additional impact devices are interchangable, and the LHT-200 has auto recognition function which detects that a different device is connected.  All the relevant settings become visible when the different devices are connected.

Below are a list of the different devices and their application;


D Type -  This is the standard supply and are used in 90% of applications.  It is a good general use device and works on material that is greater than 5mm of thickness.

C Type - impact devices are suitable for small and light work pieces from about 1mm of thickness depending on the material.  They are also better for testing materials with surface hardened layers as the C-type applies a lower force when testing.

DC Type - This unit is designed for reduced access applications.  It is much shorter than the standard unit with all the standard functionality of the D-type impact device. 

DL Type - Long nose 'pin' type is designed to gain access in areas that other gauges cannot.  Places like gear teeth, long channels, holes and recesses are some of the areas that this unit is designed for.

G Type - This unit is designed for rough, heavy objects such as castings.  It has a heavy duty device that allows for an uneven, unpolished surface.

If you are uncertain on with device would suit your application best, please contact us to discuss.


Impact Device D/DC/DL G C
Impacting Energy 11mJ 90mJ 2.7mJ
Mass of Impact body 5.5g/5.5g/7.2g 20g 3.0g
Diameter 20/20/6mm 30mm 20mm
Length 147/86/202mm 255mm 141mm
Weight 75/50/60g 250g 75g
Max. Hardness of workpiece 940/940/950HV 650HV 1000HV
Surface Roughness of workpiece ≤1.6µm ≤6.3µm ≤0.4µm
Min weight of workpiece (direct) >5Kg >15Kg >1.5Kg
Min weight of workpiece (support) 2~5Kg 5~15Kg 0.5~1.5Kg
Min weight of workpiece (coupled) 0.05Kg~2 0.5~5Kg 0.02~0.5Kg
Min thickness of workpiece (coupled) 5mm 10mm 1mm
Min thickness of hardened layer 0.8mm 1.2mm 0.2mm
Hardness of spherical test tip 1600HV
Material of spherical test tip Tungsten Carbide

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