Torsionally stiff rigid couplings are best used on shafts that are already in proper alignment, so are well-suited to pump, mixer, drive shafts, and other power transmission applications. Stafford Manufacturing Corp., Wilmington, Mass., offers a full line of rigid couplings in a variety of configurations and sizes for connecting these types of components.
Rigid couplings clamp onto and join two shafts, making them operate as one, but unlike many coupling types, do not accommodate for misalignment.
Stafford Rigid Couplings are offered in one-, two-, and three-piece designs, with or without keyways, for connecting supported shafts. One-piece designs are slip over the shaft ends closely and are gradually and sequentially clamped by tightening the screws. This allows the coupling to “seat” on the shaft. Working similarly to the one-piece design, two-piece clamp couplings can be assembled anywhere because they easily come apart without tools or mechanisms. Three-piece designs can also be installed anywhere, but they can also remain assembled on one shaft while they are disassembled from the other.
For mixers with unsupported shafts, Stafford’s Dual-Keyed Couplings feature axial and annular keyways to transmit torque while restraining lateral motion. All designs can incorporate straight- or stepped-bores for mating dissimilar shafts.
Available with straight-through or stepped bores, these rigid couplings feature the clamp-type design and are precisely machined to securely couple two shafts with no marring or backlash. Among Stafford’s specialty shaft couplings are ones that offer extra tight tolerances or high torque values, as well as inch-to-metric conversion couplings.
Machined from high temperature alloys, stainless steel, steel, or aluminum, Stafford Rigid Couplings are available in 1 to 6 in. I.D. sizes with keyways formed to customer specifications.
Stafford Manufacturing Corp.
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