Replacement mixer & agitator shafts for propellers and mixing blades.
These drive a propeller or mixing blade in an open-tank or portable agitator, one end fits the mixer drive, the other fits the attachment. Pick a size below to load it into the configurator with the ends pre-machined. Three families: set-screw propeller (D-profile both ends, 316 SS), threaded propeller (5/16-24 right-hand thread, 316 SS), and mixing blade (1/4-20 left-hand thread for counterclockwise running, 303 SS, ships with a flat washer, left-hand hex nut, and sleeve washer). 5/16″ through 1″, up to 62″ long. You stay in control of material, finish, tolerance, and features.
The OD ships cold-finished (mill finish), the drive load transfers at the D-flat or thread, not the OD, so the OD doesn't need a finer finish. These carry standard ±0.005″ tolerances (no precision fits). For sanitary (food/pharma) service, switch to a finer-Ra finish (down to 16 Ra) in the configurator; tighten any close-fitting seal or bushing surface you call out and we turn it to spec.
Mixer shaft sizes
Replacement mixer / agitator shafts that drive a propeller or mixing blade. One end fits the mixer drive, the other fits the attachment. Three families: set-screw propeller (D-profile both ends, 316 SS), threaded propeller (5/16-24 RH thread, 316 SS), and mixing blade (1/4-20 left-hand thread, 303 SS, ships with washers + nut). 5/16″ through 1″, up to 62″ long, with a cold-finished (mill) OD, no precision fits. Click a card to load a configurable starting point. Crosses the McMaster 3473K / 1123N / 3518K mixer-shaft series.
It connects a mixer drive to a propeller or mixing blade. One end fits the mixer drive: a D-profile flat for a coupling or set screw, or a plain (straight) end. The other fits the attachment: a D-flat for a set-screw propeller, a thread for a threaded propeller, or a thread with washers for a mixing blade. Each loads into the configurator with the ends pre-machined; diameter, length, material, finish, and features stay editable.
Match the shaft diameter to your mixer drive and attachment, then the length to your tank depth. Pick the family by how the attachment mounts: set-screw propeller (D-profile both ends), threaded propeller (5/16-24 thread), or mixing blade (1/4-20 left-hand thread). If you're replacing a catalog part, the cards cross-reference the McMaster 3473K / 1123N / 3518K series.
Mixing blades run counterclockwise, so a left-hand thread tightens under load instead of backing off. The mixing-blade cards load a 1/4-20 left-hand thread and ship with a flat washer, a left-hand hex nut, and a sleeve washer. The threaded-propeller cards are right-hand (5/16-24).
Set-screw and threaded-propeller cards default to 316 stainless; mixing-blade cards default to 303 stainless. The OD ships cold-finished / turned (about 125 µin Ra, a "mill finish"), the drive load transfers at the D-flat or thread, not the OD, so the OD doesn't need a finer finish. For sanitary (food/pharma) service, switch to a finer-Ra finish (down to 16 Ra) in the configurator. Material certs (MTRs) are available on request.
No, there are no precision bearing journals or press fits on these. They load with standard ±0.005″ tolerances. If your mixer has a close-fitting bushing or seal at the drive, tighten that surface's tolerance and Ra target in the configurator and we turn it to spec.
The diameter, overall length, end types, and thread size/length/direction are taken from the published catalog data. The D-profile flat dimensions and which end is the mixer vs. attachment end are reconstructed from the catalog drawing and confirmed against a sample before we cut. The drawing title block stamps the source SKU so any deviation is visible.