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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?

Pᴀᴜʟsᴛᴇʀ2
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Alex
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2 Answers2

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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).

blacksmith37
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My guess is to avoid liability of damaging your hand tools. When you use regular sockets and hand tools on a stuck nut, most likely the socket would be broken first. However, when you use impact socket instead, the hand tools are the weak point now.

Sailynette Garcia
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