Different Chuck Key Sizes

Usually on the side of the drill chuck there will be some stamped numbers.

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. Keyed chucks are engineered to either loosen or tighten the hold on a tool by using a key. The wedges grip an area of 75 mm 2 0 116 sq in and the shank is inserted 40 mm into the chuck.

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. This measurement is called the pilot shank. Shop the top 25 most popular chuck key sizes at the best prices. 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. A 10 mm shank with two open grooves held by the driving wedges and two closed grooves held by locking balls. Easy online ordering for the ones who get it done along with 24 7 customer service free technical support more. If you plan to use large bits then choose a larger chuck.

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. Keyed chucks offer the advantage of applying additional torque on the bit when slippage is a concern during heavy duty applications.

When it comes to drill chuck key holders grainger s got your back. Keyless chucks are engineered to quickly loosen and tighten a tool on the chuck collar of the drill either by manual. The chuck size looks something like. Unless a real oddball most chuck keys will be listed by pilot size.

If you pull out your ruler you ll see that 1 8 isn t very big at all. Step 2 measure the diameter of the hole on the side of the chuck in inches with a ruler. 1 4 3 8 1 2 etc. Determining the proper replacement chuck key for your drill can be very frustrating.