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What is the disadvantage of using impact sockets on a hand wrench?

Motor Vehicle Maintenance & Repair Asked on April 5, 2021

The Instructions that came with my gp CrMo sockets say:

Only use impact sockets with power driven or impact tools. Do not use impact sockets with hand tools such as ratchets, breaker bars, leverage bars or torque multipliers.
(Safety Instruction #2)

Why is this so? I understand using a Cr-V socket on an impact wrench can have the socket burst without warning, or damage the wrench. However, this is the only reference I found that the opposite is not allowed (as per safety!) — anyone know why this might be?

One Answer

Impact sockets I have had were thicker than standard sockets so there may be a few locations which are not accessible with impact sockets. But I think the primary reason is to get customers to buy two sets of sockets . Or maybe three sets; 12 point, 6 point and impact. The alloy makes very little difference , although I have many books that recommend different alloys for different applications. Other than carbon, the alloys primarily affect the hardenability ,so full hardness can be reached to the center ( for this application).

Answered by blacksmith37 on April 5, 2021

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