Torque Control and Related Terms
Torque is the force applied to something to make it spin (rotate) in machinery. Torque in relation to fasteners is the resistance faced when installing a fastener. Torque control then is simply controlling the amount of torque placed on a fastener without damaging it by over-tightening.
||Measure of a screw or nuts frictional resistance to rotation.
|Prevailing “Off” Torque
||Highest back-off torque on a torque wrench on the first rotation of a screw or nut upon removal.
||The initial torque amount used to install a fastener before Pre-load.
||The minimum torque required to start rotation into a nut (in the case of a bolt) or into a pre-tapped hole (in case of a screw).
||Minimal torque required to begin the disassembly of a fastener assembly.
||The torque required to produce pressure onto the installation material causing compression by the fastener.
Torque Wrenches are one of the easiest ways to ensure proper torque is met. Simply set the wrench’s torque and then when the maximum is reached the clutch will slip. This slip means the wrench stops putting any more torque on the fastener and it has reached its optimal torque.
How To Install Masonry Screws
Masonry screws are used to fasten materials to different masonry materials (usually concrete). Tapcon is a brand that has become a generic term for these screws over the years, often referred to as tapcon screws.
Tapcon screws can be identified by their blue coloration. Most of them are fully threaded but some longer screws will have a smooth shoulder. This shoulder is designed to disperse the heat built up by the screw. If the shoulder was absent the screw would heat up exponentially and expand it the hole. This expansion plus the heat of the screw can compromise its integrity causing the screw to snap.
Now that we know a bit about masonry screw lets begin installing one.
What you will need:
- Concrete Drill Bit
- Painters Tape
- Tapcon Screws
- Various Driver Bits depending on which head style you choose
- Safety Gear!
The first thing we need to do is take the screw we are going to install and mark the end of the drill bit with painters tape. We do not want to drill an excessive hole in the concrete it only needs to be long enough.
Once we have our drill taped, its time for the most important part of our installation. Putting on our safety gloves and glasses to make sure we protect ourselves.
With our safety gear on and drill in gloved hand we can begin drilling our hole into the concrete. Even short concrete screws will hold very well in concrete. These masonry screws cut their own threads and will only need to be installed a little over an inch to have some true holding power. Once you reach the desired depth marked by the tape, you may remove the drill and carefully wipe any extra debris away from the hole.
This is the home stretch for installing a concrete screw. Find the appropriate bit driver. We decided to use the hex head slotted Tapcon screws due to their popularity. Simply drill the screw into the hole until the head reaches the surface of the concrete and you are done!
How To Remove Stripped Screws With a Rubber Band
Removing stripped screws can be incredibly annoying. There’s no way around it, literally. In the case of stripped screws, they can severely hinder your ability to get a project done. So we have once again consulted our fastener expert for a solution to this problem.
His first recommendation was a drill extractor bit, but those of you that follow our blog knew that already. We posted a blog about how to use a screw extractor a while ago.
But what about the everyday DIYer who doesn’t come across this situation constantly. You might not want to go buy a bolt extractor set when you only need to get rid of one pesky screw.
Enter the most useful tool ever created, next to duct tape of course! The rubber-band. A tool used for anything from a bracelet to a keep your favorite bag of chips from getting stale. A tool that is going to help you remove that screw as if it was never stripped to begin with.
So now that you have the secret tool you need to get that stripped screw removed, lets walk you through the process in three easy steps.
- Place the rubber-band over the screw head.
- Place the drill bit against the screw head through the rubber-band and apply pressure.
- Spin Slowly
And that’s pretty much it.
When you press the rubber-band against the stripped head, it fills in the spacing created by the stripping. We have done some basic testing and determined that this trick works best on semi-stripped screws but you can still get it to work on some of the more dramatically stripped screws as well if your lucky.
Have a question you need answered? Leave a comment below! If the question stumps us it may turn into a post of its own!
Removing Stripped Screws With a Rubber Band
Rubber Band Trick For Stripped Screws Transcript
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Bob: Welcome back to Albany County Fasteners – Fasteners 101. I’m Bob and I’m going to show you today how to remove a stripped screw.
I’m just showing you here that these heads are stripped out. I’m going to show you how to remove them with a rubber band. So let’s get started.
I’m gonna put it here in my vise. Okay, so I have a rubber band. We’ll put the rubber band onto the head of the Phillips and we’re going to go slow and steady outward, okay.
You have to put nice pressure on this and we’ll back it out.
So basically what the rubber band does is fill the void between the Phillips head (and the driver).
There you go.
Brass Threaded Inserts for Wood
We hear all the time about how people don’t get threaded inserts. Well today we are going to discuss how to install brass threaded inserts into wood. Lets start with the tools you will need:
Threaded inserts are fasteners that are driven into a material (in this case wood) which house internal threads for a fastener to screw into. Threaded inserts have their own cutting threads designed to cut into the installation material and provide a strong hold.
They are mostly used in situations where the fastener will need to be installed and removed multiple times. In a normal situation this process would destroy the installation hole requiring that new ones be drilled. But with these inserts you can tighten or loosen fasteners with ease over and over in the same hole.
The first and most important step in any installation is making sure you are wearing the appropriate safety gear! So since we will be drilling and working with sharp objects lets first get our safety goggles and gloves on! Now that we have our gear on let’s get started.
The first thing we need to do is get a spade drill bit. Spade bits are made specifically for boring holes. When you start drilling the hole you will notice that the but has a tendency to bounce around. To prevent this wobbling effect we recommend drilling at a very slow speed.
Once you’ve drilled your hole your going to take the E-Z Lok Drive tool, or Flathead driver bit, and set it in your drill. The threaded inserts have two breaks along the top of the insert where you can fit a slotted screwdriver but we recommend using the E-Z Lok tool. This tool fits snug into the gaps making driving these inserts much easier.
You’re going to want to hold the insert and fit it as straight into the hole as you can. It is critical that the insert goes into the hole as straight as possible so your fastener can also sit flat once installed. It may also cause chipping of the wood
Continue driving until the threaded insert is flush with the surface. Now just line up your new material over the hole and begin tightening your fastener into place.
How to Prevent Screw Stripping and Scratching
Screw stripping and scratching commonly happen when the driver bit slips out of the drive and causes imperfections in the head of a fastener. This can result in either a burring effect which can remove the finish from a fastener. You definitely don’t want to mess up on a screw going onto a finished product!
We chose to use a black oxide stainless steel screw. Black oxide is a coating that goes over stainless steel to add an extra layer of corrosion and abrasion resistance. This screw is commonly used for its sleek black look so you definitely don’t want to mess it up.
To quickly mitigate the effects of slipping, simply take your favorite roll of painters tape and wrap the bit with it. This will make the drive fit more securely to help deter that slide out effect while also protecting the head of the screw in the event of a slip out.
Make sure you use proper drilling form when you’re drilling. Always keep a good amount of pressure on the screw and make sure you don’t try to drive it too quickly as this may lead to driver slippage. For an even more secure hold, you might want to check out Torx or square drive screws which are designed to decrease the chance of stripping even more!
And here it is! Our fully installed black oxide stainless steel phillips head screw. Free of any burring or stripping. Follow this tip to keep your fasteners looking brand new!
How to Prevent Screw Stripping
Preventing Screw Stripping Transcript
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Bob: Welcome back to Albany County Fasteners – Fasteners 101. I’m Bob and today I’m going to show you a tip using blue tape to prevent scratching or damaging the heads of your screws. And we now have our evolution saws in stock so check it out on the website we can ship immediately. So let’s get started.
I have here a black oxy (oxide) screw. You can see there the head is perfect. No scratches or anything. To prevent making marks to your screws as you’re installing them – this is a sheet metal screw, same thing goes if you’re just using a hand screw driver – to prevent the scratching or damaging of the heads, what I recommend you do is, take a piece of blue tape, this is painters blue tape, and just put
it over the head like so.
Then put your screw into the bit and screw it in.
You will see here, the head has no damage to the to the Philips Drive (recess) so you won’t see any marks or imperfections to the metal.
This is a little quick tip for you guys. It’s something that I use when I’m putting in screws that are going to be visible on the finished product, and that’s my tip of the day.