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Herbert High Speed Bench Drill restoration
After owning a cheap pedestal drill and not being happy with it I set about getting a bench drill like the Waldown NH-3. I missed quite a few at auction but I did find this drill close to home. The machine is an Alfred Herbert "B" type bench drill that has a collet chuck and a speed range from 3000 to18000 rpm. The motor is a three phase two pole unit with special balancing and run at 2850 rpm. The drive pulleys are crowned and suit a flat belt. I sold the Chinese drill and am now restoring the Herbert to include new electrics and a single phase to three phase VSD. It has taken a few months to start but I am underway now.
regards mgtoolmaker
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Progress report and spare parts
So to progress,
Finding spare parts for Herbert drills is easy, you just contact the Paul and in a few emails, you will have hat you need. For the Type 'B' virtually every part can be purchased. I will caution parts are not cheap so you have to remind yourself that this is a machine that would cost at least $10k if it was new and in today's money. [email protected] is the email to get parts and prices and advice for your Herbert drill project.
Disassembly - the drill is totally in bits now and the 50 year old dry grease as been cleaned out of the bearings. Things to watch for are left and right hand threads holding bits in place, hidden pins holding things in place and being organised. I have used zip lock bags to store the sub assemblies. There is no rust in mine and little if any wear so the pin spanners I made worked. Kerosene and WD-40 were used as cleaners.
Body work and paint - my secret recipe of car cutting compound, nylon scourer and elbow grease. The original is still good
Electrics -I have a Powerflex 4M single phase in, three phase out VSD ready to use, all wiring will be new
Things to buy, I have to get some low temp,high speed grease, this is because at 18000rpm it will need it. I am using SKF LGLT-2 which I can get near home.
As I clean I will photo parts for the thread. hopefullyunderside of the drill attached
regard mgtoomaker
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Here is the spare parts list
Thought you may like to see the spare parts list so here it is,
regards mgtoolmaker