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Saw Invention Makes Accurate Fence Joints
Robin Humphries is a perfectionist when it comes to building fences, but he found out cutting mortis slots for rails in upright posts is anything but easy.
So the Bramshill, Hants, U.K., sheep and cattle farmer designed and built an add-on device for his Husqvarna 45 chainsaw that allows him to cut the slots quic
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Saw Invention Makes Accurate Fence Joints FENCING Techniques 21-5-8 Robin Humphries is a perfectionist when it comes to building fences, but he found out cutting mortis slots for rails in upright posts is anything but easy.
So the Bramshill, Hants, U.K., sheep and cattle farmer designed and built an add-on device for his Husqvarna 45 chainsaw that allows him to cut the slots quickly and with pinpoint accuracy so his rails are exactly parallel to the ground.
The saw fits into a frame that chains to the side of a post. A sliding subframe moves the saw into the post and a screw-type handle moves it back and forth to cut a slot. Turning a handle moves the saw sideways. Adjustable stops limit its travel to ensure uniform slot width and depth.
A single folding leg sets slot height at a uniform 3 ft. off the ground.
It takes about 8 cuts and about 57 seconds to make a clean-cut slot.
He built the guide for about $35 and has used it to cut 100 to 120 mortises. (Photos and story courtesy Farmers Weekly)
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