Grub screws are often used to secure collets, gears and faucet handles, among other things. Grub screws, commonly known as set screws, do not have heads. They have either a hole for an Allen wrench or a slotted opening for a flat-head screwdriver. Grub screws are just like any other screw, which means they can be difficult to remove. Removing stubborn grub screws is really no different than removing any other screw. All that is necessary is a little bit of lubrication and a lot of patience. Does this Spark an idea?
- Spray penetrating lubricant
- Allen wrench
- Flat-head screwdriver
- Center punch
- Drill bits
- Screw extractor
- Tap-and-die set
- Socket wrench
Spray the edges of the grub screw with a penetrating lubricant and allow it to work for 15 minutes. The penetrating lubricant eats away at rust and other corrosives to aid in loosening the screw.
Turn the grub screw clockwise slightly with either an Allen wrench or flat-head screwdriver, depending on the screw. When the screw moves, turn the screw counterclockwise to remove it from the part. The movement clockwise, as if tightening, sometimes breaks the seal any rust may have on the screw.
Insert a center punch into the center of the screw if the screw still does not budge. Tap the end of the center punch with a hammer to create an indentation. This indentation prevents the drill bit from walking as you drill through the screw.
Drill a hole through the center of the screw with an appropriate size drill bit. Most screw extractor kits have directions on what size hole to drill for the various extractors.
Insert the appropriate size screw extractor into the hole, then tap the end of the extractor with a hammer to insert the tool firmly into the hole. Turn the extractor counterclockwise with the handle from a tap-and-die set. The handle fits snugly over the screw extractor. Alternatively, you can use a six-sided socket wrench to turn the tool. Remove the screw from the part.
Screw Head Differences for Standard & Metric
Metric screw heads have different measures than flat-head and Philips-head screws. screw-driver with a set of nozzles image by Yuri Tuchkov from...
Products for Grub Control
Products for Grub Control. Grubs are the larvae of different insects, such as the Japanese beetle and the European chafer, that lay...
How to Remove a Screw With a Stripped Out Head Using Tools You Have At Home
Screws with damaged heads that are embedded in wood or metal seem impossible to remove. Sometimes the very act of removing screws...
How to Remove a Stuck Set Screw
Set screws secure one object to another. For example, a faucet stem connects to a faucet handle using a single set screw....
How to Remove Stubborn Screws
Removal of a stubborn screw is all about using a power screwdriver that has a screw extractor attachment. Find out how to...
How to Remove Flat Head Screws
Whether you call this type of screw a flat head screw or a countersunk screw, the purpose of the screw is the...
How to Use a Spiral Screw Extractor
Broken bolts and screws are commonplace when repairing your vehicle. When a fastener breaks, you need the proper tool to remove the...
How to Remove Stubborn Screws
Screws don't come out easily when they're rusted, old, or stripped. Rusted or old screws may require a spray or two of...
How to Remove Nose Screws
A nose screw is a type of body jewelry used in a nose piercing. The piece gets its name from its corkscrew...