A rigid flanged coupling hub for a 2" bore, dimensioned to the Machinery's Handbook Safety Flange Couplings table: a 4-1/2″ (4.5″) hub, a 8″ (8″) flange, and a 5-bolt circle on a 6-1/4″ (6.25″) diameter. Comes with a 1/2 SQ keyway and a slip bore. Two identical hubs bolt face to face to make the coupling. Load it as a configurable starting point; every dimension is editable.
The bore, keyway, bore fit, flange bolt circle, material, and tolerances all stay editable in the configurator. Two identical hubs bolt face to face to make the coupling. Confirm the bore and keyway against your shaft, or send us the old hub or a print, before ordering. The drawing's title block stamps the dimensions so any deviation from the standard proportions is visible to your buyer and to us.
By the bore, the diameter of the shaft it mounts on. Pick the card that matches your shaft and the hub loads with the bore, keyway, hub and flange diameters, bolt circle, and bolt count dimensioned to that bore from the Machinery's Handbook Safety Flange Couplings table. Every dimension stays editable in the configurator, and two identical hubs bolt face to face to make the coupling.
The ANSI/ASME B17.1 square key for the bore, the same standard the coupling industry references through AGMA 9002. A 1" bore gets a 1/4" key, a 1-1/2" bore gets a 3/8" key, and so on. You can change the key size, switch to none, or set the bore as a plain slip bore in the configurator.
The bore is machined as a plain slip (clearance) bore in this version, the AGMA 9002 commercial fit, so it slides on the shaft and locks with the key. Interference (shrink) bores per AGMA 9002 Class 1 and Class 2 are coming as a configurable bore fit. For an interference bore today, send us the shaft size and we set it on the order.
Five bolts, the count the Machinery's Handbook safety-flange-coupling table specifies across this bore range, on a bolt circle set midway between the hub and the flange rim, with clearance holes sized for the bolt (3/8" at a 1" bore up to 3/4" at a 2-1/2" bore). Two mating hubs share the same bolt circle so they pair up. The bolt circle, count, and hole size are all editable if you are matching an existing coupling.
The cards default to 1045 cold-finished steel, the coupling-hub workhorse. Step up to 1144 Stressproof or 4140 for higher torque, or 304 stainless for washdown service, in the configurator. Material certs (MTRs) are available on request.
This family is the rigid flanged (ribbed) style, two hubs bolted face to face. Jaw (Lovejoy L-series), grid (Falk T10), and Taper-Lock or QD bushing styles are proprietary envelopes we add as demand warrants. Send us the coupling model or your old hub and we will tell you what we can match.
Lovejoy, Falk, Steelflex, Taper-Lock, QD, and AGMA are trademarks or trade names of their respective owners. Great Lakes Shafts is an independent manufacturer and is not affiliated with, sponsored by, or endorsed by any of them. These are custom rigid flanged coupling hubs proportioned to published engineering standards; those names are used only to describe coupling styles customers sometimes ask us to match.
