And what country can preserve its liberties if their rulers are not warned from time to time that their people preserve the spirit of resistance? Let them take arms. The remedy is to set them right as to facts, pardon and pacify them. What signify a few lives lost in a century or two? The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
The precision of the spindles on these things is stunning. Properly mounted and tooled (note the condition!) I've used them to drive 1/64th inch mills on aluminum and steel. For those not versed in the Ars Mechanica: runout in a milling cutter must be less than 3% (and that's very iffy, most would say 1% or less especially with small cutters) of the diameter of the cutter. A 0.0156" cutter thus needs less than 1/1000" runout or less to be used. The spindles on these routers routinely hit <2 tenths runout. And then the manufacturer supplies them with an unbalanced nut and collet made with a stone axe finished by hammer forging good for nothing under 1/4". Fortunately, good collets and nuts are available, for about half the price of the motor itself.
Nice piece of kit except it’s awkward unless you NBA sized hands.
ReplyDeleteThe precision of the spindles on these things is stunning. Properly mounted and tooled (note the condition!) I've used them to drive 1/64th inch mills on aluminum and steel. For those not versed in the Ars Mechanica: runout in a milling cutter must be less than 3% (and that's very iffy, most would say 1% or less especially with small cutters) of the diameter of the cutter. A 0.0156" cutter thus needs less than 1/1000" runout or less to be used. The spindles on these routers routinely hit <2 tenths runout. And then the manufacturer supplies them with an unbalanced nut and collet made with a stone axe finished by hammer forging good for nothing under 1/4". Fortunately, good collets and nuts are available, for about half the price of the motor itself.
ReplyDelete