The motivation behind Stanley’s decision to develop the Bed Rock line of planes is debatable. However, given their genius at marketing and creating demand, I suspect it was driven by a couple of different factors. In 1895, Justice Traut patented what would become the basic Bed Rock design. That same year, E. A. Schade patented the frog adjustment feature that would initially be used on the Bed Rock planes, and eventually (1907) would become a mainstay feature of the Bailey line of planes.
The introduction date of Bed Rock planes is a little uncertain. They first appeared in Stanley catalogs in 1900, but there is some evidence they may have begun manufacture as early as 1898. Apparently there was a dispute over the Schade patent, because those sold for the first year or two have the Sept. 3, 1895 patent date on the bed milled out. This was done by the factory, and after the body had been japanned, indicating there was some sort of legal dispute over the Schade patent that required a last minute intervention prior to the planes being sold to the public. By 1900, the milled out date was gone and just the single APR 2, 95 date from the Traut patent remained stamped into plane bodies until about 1911, when Stanley introduced a major design change.
The Bed Rock line was marketed as Stanley’s premium line of bench planes. There were two primary differences between the Bailey line and the Bed Rocks, and both were in the frog design.
The absolute solidity and one-piece effect of the “BED ROCK” PLANE is as much a fact as if the parts were all one, for the reason that the entire under surface of the Frog is in perfect contact with the solid seat cast in the Plane Bottom. The frog and the Bottom are so perfectly fitted together, that from the Plane Iron to the Bottom, the Plane is as one solid piece of metal. This form of construction positively prevents any chance of vibration.
The width of the mouth may be regulated and made wider or narrower as coarse or fine work may require. First remove the lever and cutter and loosen the two frog screws that fast en the frog t o it s seat. With a screw driver turn the center adjusting screw to the right to close the mouth, and to the left to open it. When the frog is in the position desired, tighten the frog screws and replace the cutter and lever .
After the frog adjustment feature was added to the Bailey line in 1907, there was little to clearly differentiate the Bed Rock planes from the Bailey planes. For example, while the frog base design was arguably superior, it was a feature that was not readily apparent unless one were to disassemble the plane. Further, up until this point, the profile of the plane base was the same on both Bailey and Bed Rock lines; with both using the same classic ‘hump’ on each cheek. For Stanley to differentiate the two and justify the premium cost of the Bed Rock, it’s pretty easy to see the reasoning behind the changes they were about to make.
1. On March 14, 1911, Schade was granted another patent for the use of pins and set screws to both attach and adjust the position of the frog. This new design was superior to the previous (and the one provided on the Bailey planes), and set the Bed Rock line apart from all of Stanley’s competitors.
2. In addition to the new frog attachment and adjustment design, Stanley, in a move of marketing brilliance, also changed the profile of the body casting, flattening the tops of the cheeks to give the Bed Rock planes a unique look all their own. With such a clear visual distinction, it’s not hard to imagine that this decision was intended to induce those with the financial means to spend a little more and buy the premium Bed Rock planes.
3. The third major change was the addition of a raised receiver for the front knob, and the transition from the low knob to the high knob. It’s interesting that high knobs weren’t introduced to the Bailey line for another 8 years, and the raised receiver wasn’t added to the Bailey design until 1929, some 19 years later!
The Bed Rock line included pretty much the same assortment as the Bailey line, with the omission of a number 601, which was never produced. The line included everything else from the 602 to the 608, including half sizes and corrugated versions. The only other exception is that they never made a corrugated version of the 605 1/4.
Bed Rocks were slightly heavier planes with slightly greater mass. The 1934 Stanley catalog offers a comparison, with the no. 603 weighing 1/4 lb more than the Bailey no. 3, and the no. 608 weighing 1/2 lb more than the no. 8.
Prior to the 1911/1912 changes, Stanley manufactured Bed Rock style planes for both Winchester and Keen Kutter. These planes were very similar in design, varying mainly in the lateral adjustment levers, lever caps, and numbering system.
The chart below lists specifications for Stanley’s line of Bed Rock planes.