Why is it called a Robertson?
Why is it called a Robertson?
Peter frequently told the story- now a legend – about the accident in downtown Montréal. He was demonstrating a spring-loaded screwdriver when the blade slipped from the screw-slot and badly cut his hand. The incident inspired him, so he decided to invent an improved and safer screw – The Robertson® Drive.
Is Robertson or Phillips better?
Robertson’s design consists of a tapered square-tipped screwdriver that fits into a matching square recess (the “socket”) in the screw head. This design makes a Robertson screwdriver less susceptible to cam-out than a Phillips driver because the driver bit inserts deeper into the screw head.
Why are there no Robertson screws in America?
Most historians attribute its lack of popularity in the United States to Henry Ford. Having been nearly bankrupted by shady European licensees, Robertson refused to license his invention to Ford. Without a guaranteed supply, Ford turned to the Phillips-head screw, cementing its reign in American industry.
Is Torx better than Robertson?
The Torx are actually fractionally quicker to seat on the screw. This make sense when you consider that there are six points on a torx, versus four on a robertson. So there are more positions where the torx screwdriver will just slip into place.
Why are Robertson screws?
Robertson’s screws were superior to slot head screws since the square recess automatically centered the screwdriver, provided more surface area for the driver to press against and reduced the chance of slippage.
What are Robertson screws used for?
The socket-headed Robertson screws are self-centering, reduce cam out, stop a power tool when set, and can be removed if painted over or old and rusty. In industry, they speed up production and reduce product damage.
What are the benefits of using a Robertson screws?
Robertson, a Canadian, in 1908. It offered a big advantage over the slotted screw head because it was self-centering and not prone to slipping when driven.
How do you unscrew a Torx screw without Torx?
If you don’t have a Torx screwdriver, you can attempt to unscrew the screw with a flat head screwdriver. Simply insert the flat head screwdriver into two opposite edges of the Torx screw head. Then, turn counterclockwise slowly to remove.
What is the difference between Torx and Torx Plus?
The Torx Autosert feature guides the driver bit accurately into the recess creating a self-centering engagement action. Torx Plus is designed for high torque transmission. This means that higher torques can be used to securely tighten fasteners without incurring additional wear and tear on the tools.
What does a Torx driver look like?
The Torx screw head system is shaped like a six-pointed star, and to many users is simply referred to as a star screw that requires star screwdrivers of star bits to install them.
Who uses Robertson screws?
Although the Robertson screw is most popular in Canada, it is used extensively in boat building because it tends not to slip and damage material, it can be used with one hand, and it is much easier to remove/replace after weathering.
What is a Robertson screw or Robertson head screw?
What is a Robertson Screw or Robertson Head Screw? Most of us call Robertson screws “square drive” or “socket head” screws. They were invented by Canadian traveling salesman Peter Robertson around 1906. Up until that time, almost all screws were “straight drive” or “slot head” screws.
What is the size of an orange Robertson screwdriver?
Orange drivers (#00) are appropriate for use with screw types 1 and 2. The recess size range (the size of the corresponding square imprint on the screw) is from 1.77-1.80 mm. Yellow drivers (#0) work with screw types 3 and 4 and feature a recess size range of 2.29 to 2.31 mm.
What kind of bit do you use to drill through a wall?
Long Masonry bits (300 to 400mm) are available for drilling through masonry walls. Bit sizes range from 4 to 16mm. Sharpening – use a drill sharpener or grindstone to sharpen the tungsten carbide tip. Spur point bit . Also known as a wood or dowel bit, they have a central point and two raised spurs that help keep the bit drilling straight.
Is the Robertson screwdriver still used in the US?
Although the design was rapidly integrated into the Canadian market and thrives there today, Robertson screws and screwdrivers were much less successful in the US and are not commonly used.
What’s the size of a Robertson screw bit?
Each bit is identified by a powder-coated color particular to the Robertson drive size – a standard reference. All have 1/4″ hex shanks. The yellow #0 drive bit is 1” long and is for screw sizes #3 and #4. The green #1 drive bits are 1”, 2” or 4” long and fit screw sizes #5, #6 and #7.
What kind of metal is a Robertson bit made of?
Finally found true Robertson bits. They seem to be made of hard enough metal to last a long time, although I would rather strip the bit than the screw head or bolt, so either do the final tightening by hand or set your electric drill to a lower number.
What was the purpose of the Robertson screwdriver?
Once Robertson had conceived the notion of a square-headed screwdriver, he toyed with various manufacturing methods until he was able to produce screws with a square-shaped imprint on their heads. When the correctly-sized driver is inserted into a corresponding screw, the user can rotate the driver horizontally without fear of the driver slipping.
What’s the difference between Robertson and Quadrex bits?
They are also known as Quadrex bits. Assortments contain bits with multiple drive styles. Also known as Robertson bits these are designed for screws with a square recess in the head. The slim body reaches into tight spots to grip and turn screws that are hard to reach or too small to hold by hand.