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Miniature disc couplings

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article image Accommodates axial, angular and parallel misalignment.

RULAND Manufacturing, represented in Australia by Naismith Engineering & Manufacturing , has added Discflex miniature disc couplings to its zero-backlash motion control coupling line.

The couplings come in both single and double disc styles and are an assembly of two anodised aluminum hubs, a centre spacer (double disc style only) and multiple flat stainless steel disc springs to transmit torque. The thin discs allow for a substantial amount of misalignment between shafts while remaining rigid under torque loads. Parallel misalignment is accommodated by the double disc style or by two single disc couplings used in tandem.

Disc couplings are high-performance motion control couplings with zero backlash, speeds of up to 10,000 rpm, strength and torsional stiffness characteristics, as well as low inertia for today’s highly responsive systems. Double disc couplings are used in typical servomotor lead screw applications while single disc couplings can be used when a longer distance is required such as on gantry systems.

Double disc styles are available with either an anodised aluminum centre spacer or an electrically isolating acetal centre spacer. Both disc style couplings are offered in standard sizes with outside diameters from 15mm to 57mm in both Nomar clamp style and set screw style. Bore sizes from 1/8 of an inch to 1 1/4 of an inch are available as well as 3mm to 30mm sizes in the metric series.

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