Numbers on the rotary blade?
11-25-2019, 02:14 PM
#11
Super Member
Join Date: Aug 2010
Location: Upstate New York
Posts: 1,231
Ok..so now I am confused! How can rotating a rotary blade help anything? If the blade rotates properly, isn't it all either sharp or dull at the same time? I know I'm missing something here, but I can't wrap my head around the concept????
11-25-2019, 02:17 PM
#12
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Join Date: Mar 2010
Location: New Hampshire & Maine
Posts: 3,300
Donna13350: the way I understand it, the blades were made for a different type of cutter that lines up the numbers on the blade with the numbers on the cutter. Instead of retooling the machine for the blades, the manufacturer uses the "old" tooling with the numbers. With today's rotary cutters, the numbers mean absolutely nothing. Hope this clears it up for you.
11-25-2019, 05:24 PM
#13
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Join Date: Nov 2019
Posts: 11
There was an article in an issue of Lady’s Patchwork Quilts in the early 2990’s about a quilter named Gerry Salem. She had a company that manufactured the Salem cutting mats. The article also described her involvement and influence in working with the Japanese company that made the rotary cutter and blades with the numbers on the side. The article describes the blade and cutter being developed for paper cutting and did not rotate but would be advanced as each section become dull. She suggested that the cutters be redesigned to rotate then it would then be adaptable to cutting fabric.
11-25-2019, 06:09 PM
#15
Senior Member
Join Date: Jun 2019
Location: Iowa
Posts: 377
Take a look at the Olfa Chenille cutter... there’s the numbers and the dial to expose a new part of the blade when one part gets dull. Pretty ingenious!
https://www.amazon.com/World-Kitchen.../dp/B00HVMOUB0
https://www.amazon.com/World-Kitchen.../dp/B00HVMOUB0
11-26-2019, 07:58 AM
#18
Super Member
Join Date: Jun 2010
Location: Waterford Michigan
Posts: 7,241
The original rotary blade was designed to fit a safety cutter that positioned each section of the rotary blade in a fixed position to be used upon the dulling of the previous section. The numbers represented each of those sections. When OLFA introduced the original rotary cutter in 1979, the numbers became irrelevant, but have been maintained as a sort of historical feature representing the original rotary blade.
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