Different Chuck Key Sizes

If you pull out your ruler you ll see that 1 8 isn t very big at all.

Different chuck key sizes.

The chuck size looks something like. The wedges grip an area of 75 mm 2 0 116 sq in and the shank is inserted 40 mm into the chuck. Generally a chuck does not have a wide range of sizes but only two. But what if you need to drill a hole whose diameter will be larger say 20 mm.

Determining the proper replacement chuck key for your drill can be very frustrating. This measurement is called the pilot shank. Since everyone has different needs let s run down the different grades of chucks. A 10 mm shank with two open grooves held by the driving wedges and two closed grooves held by locking balls.

Usually on the side of the drill chuck there will be some stamped numbers. 10 mm 3 8 inches and 13 mm 1 2 inch. Easy online ordering for the ones who get it done along with 24 7 customer service free technical support more. 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.

1 4 3 8 1 2 etc. This is the most common size and takes a hammer up to 4 kg. 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. 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.

One of the more popular brands is jacobs and most manufacturers will list an equivalent number which can make determining a replacement key a bit easier. Keyless chucks are engineered to quickly loosen and tighten a tool on the chuck collar of the drill either by manual. Keyed chucks are engineered to either loosen or tighten the hold on a tool by using a key. 2020 popular chuck key sizes trends in tools jewelry accessories with chuck key sizes and chuck key sizes.

If you plan to use large bits then choose a larger chuck. The larger the size the bigger the shank. Unless a real oddball most chuck keys will be listed by pilot size. Keyed chucks offer the advantage of applying additional torque on the bit when slippage is a concern during heavy duty applications.