Z3380 / Z33100 / Z33125 / Z3550 Radial Drilling Machine

The Z3380 / Z33100 / Z33125 / Z3550 runs stated per model r/min on a 5# / 5# / 5# (II type) / 5# / 6# / 6# / Metric 80 spindle taper. Big holes in tough material live at the bottom of the range where torque works; small holes want the top. A machine that covers both ends handles the whole job list instead of half of it.

Two build points matter most on this machine: the arm guideway is inlaid with steel, a construction worked out from the quality-feedback and maintenance records of close to ten thousand radial drilling machines and around thirty years of building steel guideways; and the inlaid rail takes the wear that would otherwise fall on the arm guideway, so spindle drilling accuracy and spindle-box clamping hold up after years of arm travel. Structure decides how a machine ages — the specification table tells you what it does new, the build tells you what it does in year five.

Capacity figures are quoted in steel — 50 / 50 / 60 / 63 / 80 / 100 / 125 mm on the Z3380 / Z33100 / Z33125 / Z3550. Keep a working margin over your biggest regular hole rather than running the spindle at its limit all day: a machine bought at the limit wears its accuracy off first. In cast iron the same spindle works easier; in stainless, harder.

Both sit in the radial drilling machine group, so the decision is capacity and duty, not kind: put your largest part dimensions, material and yearly quantity against each specification table and one of the two will run out of a figure first. Send the drawing and we will name which of the two fits — including the case where the smaller machine does the job.

Every Z3380 / Z33100 / Z33125 / Z3550 is laser-measured to ISO 230-2 over its travels, cuts a test piece that is measured rather than admired, and ships with a serial-numbered report carrying the measured values. If any line misses, the machine goes back into the shop until it passes — the report is a record, not a promise.