I find an old round shoe lace tied to a key for the hand drill by the cord plug not only reminds you to unplug before changing bits.
Different chuck key sizes.
Keyed chucks offer the advantage of applying additional torque on the bit when slippage is a concern during heavy duty applications.
10 mm 3 8 inches and 13 mm 1 2 inch.
The wedges grip an area of 75 mm 2 0 116 sq in and the shank is inserted 40 mm into the chuck.
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This measurement is called the pilot shank.
A 10 mm shank with two open grooves held by the driving wedges and two closed grooves held by locking balls.
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Keyed chucks are engineered to either loosen or tighten the hold on a tool by using a key.
Step 2 measure the diameter of the hole on the side of the chuck in inches with a ruler.
I tend to replace the bent coathanger type of key with a cross drilled type although i have broken teeth from the cheeper home store variety.
1 4 3 8 1 2 etc.
2020 popular chuck key sizes trends in tools jewelry accessories with chuck key sizes and chuck key sizes.
Since everyone has different needs let s run down the different grades of chucks.
Keyless chucks are engineered to quickly loosen and tighten a tool on the chuck collar of the drill either by manual.
Generally a chuck does not have a wide range of sizes but only two.
The chuck size looks something like.
There are 2 major chuck sizes that most handheld drills have 3 8 or 1 2 if we crunch the numbers we can see that a 1 2 chuck is only 1 8 larger than a 3 8 chuck.
Determining the proper replacement chuck key for your drill can be very frustrating.
If you plan to use large bits then choose a larger chuck.
If you pull out your ruler you ll see that 1 8 isn t very big at all.
The larger the size the bigger the shank.
Usually on the side of the drill chuck there will be some stamped numbers.
Unless a real oddball most chuck keys will be listed by pilot size.