At Robertson Inc....
We Manufacture Robertson Drive - Not just Square Drive
The Robertson Screw and Screwdriver was named #7 of CBC's top 50 Canadian Inventions
Robertson is one of Canada's most recognized fastener brands
Robertson Inc. has over 100 years of expertise and experience
Robertson Inc. product is manufactured within our own manufacturing facility
Robertson Inc. offers comprehensive custom manufacturing capabilities
Robertson Inc. has extensive design, drafting and modeling capability
Robertson Inc. offers custom packaging options
One feature you can that sets us apart in the industry is The Original Robertson Cling Fit Feature. Other fastener companies are building what they call a ‘square recess product’. Here at Robertson Inc. we construct the complete Robertson fastener system that PL Robertson invented over 100 years ago – The Robertson drive.
Refer to the Robertson Fastening Guide for more information on the "Cling Fit" Fastening system and other relevant information.
The Robertson drive requires both the angle on the driver and the angle in the recess to be compatable. In a nutshell, it’s a wedge fit that gives us our Cling Fit. If the two wedges are different you end up with too much wobble or the bit does not seat properly. The wedge size is also very important due to the fact that you want the driver to contact the sides of the recess at the proper depth.
Robertson is not only known for its driving system, but it's known for it's thread profilesl. Patented in the mid 70’s, on numerous thread designs, Robertson designed and developed the first deep thread fastener- called Lo Root. Made of alloy steel in various styles and lengths, the Robertson Lo-Root has a narrow-diameter shank and a deep, widely-spaced and sharply angled thread that provides exceptional holding power in composition board and plastics. Its threads also provide superior grip in the end and side grains of soft and hard woods. Over 2/3’s of our fasteners are wood screws, half of them unique and tailored with a custom design for certain applications. We work with OEMs to make sure that our customers are getting the best possible fastener for their job.
Screw manufacturing is done by a metal working process know as cold heading. Cold heading allows the material to be deformed under a controlled environment at room temperature without the need for cutting, milling or grinding. The process starts with specially modified wire that is designed specifically for the application of screw manufacturing. The wire is deformed using a cold header. There are numerous types of cold headers and they are dependent upon the necessary amount of material for the fastener. The cold header forms the required head and drive style of the fastener. A second machine, known as a roll threader, rolls the threads onto the fastener. The roll threader uses a pair of dies with grooves matching the required threads. The roll threader squeezes the material into the grooves giving the fastener the threads. Depending upon the fastener requirements, the fastener is now heat treated to give it additional strength. The part is heated in a control atmosphere and quickly quenched to case harden the product. The fastener is then tempered to increase the ductility of the fastener. Depending upon the requirements of the customer, the fastener is sent first to a plating facility for coatings or sent directly to a packaging facility for packaging in a variety of different packages.