Different Chuck Key Sizes

When it comes to drill chuck key holders grainger s got your back.

Different chuck key sizes.

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. Since everyone has different needs let s run down the different grades of chucks. But what if you need to drill a hole whose diameter will be larger say 20 mm. Generally a chuck does not have a wide range of sizes but only two.

This is the most common size and takes a hammer up to 4 kg. 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. Keyed chucks are engineered to either loosen or tighten the hold on a tool by using a key. The larger the size the bigger the shank.

The wedges grip an area of 75 mm 2 0 116 sq in and the shank is inserted 40 mm into the chuck. Keyed chucks offer the advantage of applying additional torque on the bit when slippage is a concern during heavy duty applications. If you plan to use large bits then choose a larger chuck. 10 mm 3 8 inches and 13 mm 1 2 inch.

A 10 mm shank with two open grooves held by the driving wedges and two closed grooves held by locking balls. Keyless chucks are engineered to quickly loosen and tighten a tool on the chuck collar of the drill either by manual. 1 4 3 8 1 2 etc. This measurement is called the pilot shank.

Determining the proper replacement chuck key for your drill can be very frustrating. The chuck size looks something like. If you pull out your ruler you ll see that 1 8 isn t very big at all. 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. 2020 popular chuck key sizes trends in tools jewelry accessories with chuck key sizes and chuck key sizes. 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. Step 2 measure the diameter of the hole on the side of the chuck in inches with a ruler.