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.
Are Robertson screws better than Phillips?
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.
What are Robertson screws used for?
Combination Robertson/Phillips drives are often used in the electrical trade, particularly for device and circuit breaker terminals, as well as clamp connectors. Robertson screwdrivers are easy to use one-handed, because the tapered socket tends to retain the screw, even if it is shaken.
Are Robertson screws only in Canada?
The Robertson is now widely used only in Canada even though an independent study by the magazine Consumer Reports declared it far superior to the Phillips, which is notorious for slippage and stripped sockets.
Can you buy Robertson screws in the US?
American furniture, appliance and mobile-home industries use them, but the classic Canadian fastener is still virtually unknown to do-it-yourself home renovators. Home Depot reports Robertson screwdrivers account for less than 5 per cent of sales in the United States.
Why is it called a Robertson screwdriver?
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.
What is the most common Robertson screwdriver size?
The medium-size that’s most common is red; anyone who calls this a “#2 Robertson” deserves arched eyebrows and a thorough looking-down-on. Black is the largest size, with green being smaller; yellow and orange are smaller still but much less common.
What is a Roberts head screwdriver?
Robertson screwdriver (plural Robertson screwdrivers) (chiefly Canada) A type of screwdriver having a square tip, designed to drive a Robertson screw.
Why do we still use flathead screws?
Why? Because some manufacturers have not yet experienced the perfection that is the Robertson head screw Flat head screws are good for wood as they prevent overtightening and thus help prevent stripping.
Are Robertson and square drive the same?
Although the terms “square drive” and “Robertson” are often treated as the same in catalogs, the difference (as I understand it) is that Robertson tools and screws have a slight taper to the square recess and the square drive ones do not. Most online sources claim that the tapered design is superior.
Why are Robertson screws popular in Canada?
Phillips had invented another kind of socket screw and had no such reservations. 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 screwdriver was invented in Canada?
The Robertson screwdriver, also known as a square screwdriver, was invented in 1908 by P.L. Robertson, a native Canadian.
What screw head is least likely to strip?
A square drive and a Phillips drive offer four points of contact, making them less likely to strip than a slotted screw. Hex and Torx screws both offer six points of contact, reducing the likelihood of stripping compared to Phillips and square drives.
When did they start using Robertson screws in furniture?
Robertson Screw
In 1908, square-drive screws were invented by Canadian P. L. Robertson (1879–1951), 28 years before Henry Phillips patented his Phillips head screws, which are also square-drive screws.
Which screw head is best?
The star head (sometimes known as the branded name Torx) is the best commonly-used screw head on the market. It allows for a huge amount of torque without stripping and it’s difficult for the bit to slip out.
Is Torx better than square?
Torx are slightly better but for most usages it doesn’t matter. Robertson has the advantage that there is one common size while there are a lot of different Torx sizes.
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