Northford Timber Framers Class of 2016: Makita Chain Mortiser Fix

Northford Timber Framers Class of 2016 is April 22-24, 2016. Sign up at www.northfordti.... In this video George shows us how to fix the clamp on the popular Makita Chain Mortiser, a serious timber-framing tool.

[@oceanstatehd]

@northfordtframers Rest in Peace Gman. You will be missed by all of us.

[@GlenKV]

What a great fix, I'm going out tomorrow and getting parts for both of my mortisers, Thanks much George

[@TimberFrameHubcom]

Super great fix...thanks for sharing! I've found myself doing this exact fix on numerous of makita mortising machines.

[@drewchaplinCozy]

I believe you are referring to the original "Phillips" head screw as a Allen Head.

[@mikemorgan5015]

Looks like the lock washer does nothing. Each time the spring compresses, both washers will disengage from the surfaces. I also appears there may be a possible issue with the longer screw projecting past the plunger and engaging the work piece when fully compressed. Just looking at it, it appears that simply pulling the stock screw and putting some loctite on it is a better option. Or better yet, use a new socket head cap screw as you did, but at the stock length with blue loctite. The longer screw introduces the undesirable effects of the plunger not indexing on the slide shaft when uncompressed and hence relying on the screw alone to take on not just tensile loads but shear loads and bending moments if it's not perfectly aligned. This will cause unnecessary wear over time as the plunger mates with the off center chamfer on the shaft and forces it back into alignment as compressed. What I'm getting at is that the flat washer should be tight to the end of the shaft regardless of whether the spring is compressed or not. This precludes the need to chamfer anything since the plunger never disengages from the shaft since it's travel is limited by the washer, which should be tight to the end of the shaft. This isn't a gripe post, simply an observation from a guy that has worked on machinery for 40+ years. Of course, I could be missing something. I have NO experience with this unit, however, so feel free to correct any errors in my thought process. I post to help solve problems and prompt others to join in the discussion and share their ideas and comments, not to start fights. Have a super day!

[@mikeratkowski6934]

Great fix thanks

[@tarikbenabdallah4993]

thank you for sharing

[@bob_frazier]

Bevel where? Why?

[@littlestworkshop]

He means chamfer the end of the shaft so that the foot does not catch on it.

[@JayCWhiteCloud]

Hmmm...owned this tool for over 30 years and have even used it in Japan...never had this issue...???