Drive shafts, sensor shafts, dowel pins, and locator pins turned to print — straight, concentric, and finished for the bore.
Shafts and pins are the components most often specified as "buy" parts and then found to be impossible to source from a catalog. A drive shaft with a non-standard length and a keyway. A sensor shaft with a stepped diameter, a flat, and a tapped hole. A locator pin with a non-stock shoulder diameter and a press fit that the standard tolerance class will not hold. When that is the part on the drawing, Quick Brown Fox Solutions is the prime contractor of record and routes the work into our production network — the same CNC lathes and Swiss-type screw machines that produce production quantities for pump and instrumentation OEMs — with parts held to a plus/minus .0002 inch routine tolerance class on critical diameters.
Common applications include pump drive shafts, motor shafts, sensor and encoder shafts, dowel pins, locator pins, hinge pins, clevis pins, ground guide pins, and the dozens of variants in between. Buyers come to us when an off-the-shelf component is close but not right — non-standard length, modified end conditions, a different material than the catalog offers, or a tighter concentricity callout than the stock vendor can hit. The work flows naturally into CNC turning and Swiss CNC machining, with precision grinding coordinated for ground-and-polished diameters where a turned finish will not meet the surface callout.
Routine diameter tolerances ship at plus/minus .0002 inch on CNC lathes and Swiss platforms, with repeatability to plus/minus .0001 inch on the production network's high-precision lathe for matched-set work. Swiss capacity runs from .812 inch bar up to 1.250 inch bar (with one platform upgradable to 1.50 inch), and turning-center spindle bores run from 1.625 inch through 3.05 inch with live tooling for cross drilling, cross milling, flats, slots, and tapped holes in a single setup. Concentricity, straightness, and TIR are controlled through single-setup turning where the drawing allows it, and through between-centers regrind where it does not. For ground-and-polished finishes finer than what a turned diameter produces, cylindrical and centerless grinding are coordinated with qualified grinders in the network.
Inspection is performed against the drawing on benchtop optical comparators and with calibrated hand gauging (micrometers, bore gauges, snap gauges, indicators on V-blocks for TIR), and every lot ships with a documented inspection record under the production network's ISO 9001:2015 quality program. Heat treat, plating, black oxide, passivation, and other secondary processes are handled by qualified finishers in the network when the print calls for them. Tight tolerance machining is built into the routine, not quoted as a premium.
Plus/minus .0002 inch on diameters; plus/minus .0001 inch repeatability on high-precision lathe work.
.812 inch through 1.250 inch (1.50 inch upgrade path) on 5-, 7-, and 9-axis Swiss platforms.
Spindle bores from 1.625 inch through 3.05 inch with live tooling for cross features.
Benchtop optical comparator, calibrated hand gauging, documented to the drawing.
Most shaft and pin work comes through in stainless steel CNC machining — 303 for free-machining service, 304 and 316 for corrosion resistance in pump and instrument environments, and 17-4 PH for higher strength on load-carrying shafts. Alloy steel (4140, 4340, 8620, 1018, 12L14) covers structural shafts, dowel pins, and ground guide pins where heat treat and a hard surface are part of the spec. Brass and copper come in on instrument shafts and electrical components where conductivity or non-galling behavior matters.
Custom shafts and pins ship into pump and fluid system OEMs, instrumentation builders, robotics integrators, and aerospace programs. The common thread is a drawing that specifies dimensions, finishes, and end conditions that a catalog vendor cannot meet, and a program that cannot afford the lead time of a captive supplier.
Actuator shafts, hinge pins, and ground guide pins on structural and flight-control assemblies.
Locator pins, sensor shafts, and drive components on ground-vehicle and weapon-system subassemblies.
Sensor shafts, encoder shafts, and precision dowels for pressure, flow, and linear transducer builds.
Drive and hinge components for ground-support, cabin, and avionics-adjacent assemblies.
Stainless instrument shafts and locator pins for diagnostic and laboratory equipment.
One-off and small-lot shafts for lab fixtures, prototype actuators, and test stands.
Lathes from 1.625 inch to 3.05 inch spindle bore with live tooling for cross features.
5-, 7-, and 9-axis Swiss with .812 inch to 1.50 inch bar capacity for high-volume turned parts.
Plus/minus .0002 inch routine and plus/minus .0001 inch repeatability where the drawing demands it.
Single-setup turning to hold concentricity and TIR without between-op stack-up.
Need a different component family? See custom fittings and connectors, sensor and instrument housings, or the full custom machined parts directory.
