After mounting again the lathe apron we tested it and find a slight chatter when turning the hand wheel in one direction. Some time of careful inspection convinced us that the the source of the noise is one of the gears of the train. We didn’t check all the train gears before because to disassemble this section of the train we need a couple of special wrenches. Now it is mandatory to build them: a pin wrench socket for the shaft of the noisy gear and a special screwdriver to extract the rod that supports the switch mechanism.

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The overhauling of the UNIZ power hacksaw is finished and the saw is cutting steel again 😄. In the next picture you can see the new electrical controls that are working really smoothly: The new electrical controls for Unix saw Here you have another picture of the saw while cutting bar: The Uniz hacksaw while cutting a steel bar

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The work on the UNIZ 14" power hacksaw goes on! Almost all the elements are now cleaned, adjusted ans painted again. Most of the parts are reassembled again and the saw begins to show its best. The saw comes without its singular switch. In some weeks we will begin the work with the electrical wiring. The main target will be to overhaul its electrical system using a more conventional micro-switch and relay scheme.

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The apron Following with the overhauling of the Leinen LZ4SB now the star is the apron. The Leinen apron is double walled and all the mechanisms run in an oil bath. It has an clever mechanism to stop the transversal and the longitudinal advances when there is too much torque. This allows to work with adjustable stops during automatic turning or facing operations. Power transmission between the feed bar and the apron is done through a worm drive placed inside the apron case.

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The work on the power hacksaw is slowly moving forward. The saw was completely disassembled and cleaned. It was really dirty, full of chips and old grease. Just to show the state, look at the cutting fluid tank absolutely full of chips. The last owner shouldn’t be very proud of it… An extremly dirty cutting fluid tank of the hacksaw After disassembling, the general state observed is good enough for a maybe 50 or 60 years old saw.

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