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Technical information for couplings Note: The zero backlash, flexible metal bellows or elastomer couplings are particularly suited to highly accurate drives with average torque values. They are the ideal solution for accurately connecting two shaft journals at a true angle. Axial, radial and angular displacement between two ends of a shaft can be compensated within defined limits. This produces minimal bearing stresses as a result of the low restoring forces. A strong shaft to hub connection guarantees zero backlash transmission of torque, even without additional parallel key. Low mass moments...

23000 Metal bellows couplings Version: Bright. Sample order: nlm 23000-012, D1 = 6 D2 = 6 (The hubs are supplied pre-bored). On request: Hub bores D1 and D2 with separate tolerance class or range. Note: Radial clamping of the hub for short mounting times and easy installation even in difficult to reach spaces. Take note of the required clamping screw tightening torque. Drawing reference: 1) EASY clamp system from size 20 Assembly: The shaft to hub bore fit should be a transition fit. The play should be min. 0.01 mm and max. 0.04 mm. i.e: shaft Ø 28 k6 bore Ø 28 F6. Bores smaller than D1/D2 min....

23002 Metal bellows couplings clamping with grub screw L2 Material: Hub aluminium. Bellows stainless steel. Version: Bright. Sample order: nlm 23002-0004, D1 = 3 D2 = 3 (The hubs are supplied pre-bored). Note: Clamping the hub with a grub screw is a cost-effective alternative to the metal bellows couplings with radial clamping hub (23000). Short mounting times and an easy installation even in difficult to reach places. Take note of the required tightening torque for the grub screw. To ease removal, a flat milled on the shaft is recommended. Temperature range: -20 °C to +90 °C. Assembly: The shaft...

23010 Beam couplings with radial clamping hub, aluminium L1 Material: Aluminium. Version: Bright. Sample order: nlm 23010-1016, D1 = 2.5 D2 = 2.5 (The hubs are supplied pre-bored). Attention: Procedure for enlarging pre-drilled bores D1/D2: Note: Zero backlash, torsionally rigid, resiliently flexible and maintenance-free full metal coupling for transmitting angle synchronous rotary movement. The innovative slit structure makes possible a very good axial, radial and angular flexibility with low reset force. Ideal for servomotors. Temperature range: -50 °C to +150 °C. Drill the bore out using a...

23010 Beam couplings with radial clamping hub, stainless steel L1 Material: Stainless steel 1.4305. Version: Bright. Sample order: nlm 23010-2016, D1 = 2.5 D2 = 2.5 (The hubs are supplied pre-bored). Attention: Procedure for enlarging pre-drilled bores D1/D2: Note: Zero backlash, torsionally rigid, resiliently flexible and maintenance-free full metal coupling for transmitting angle synchronous rotary movement. The innovative slit structure makes possible a very good axial, radial and angular flexibility with low reset force. Ideal for servomotors. Drill the bore out using a small as possible...

23012 Beam couplings with removable clamping hub, aluminium L1 Material: Aluminium. Version: Bright. Note for ordering: D1 and D2 are customer specific e.g. 23012-1025; D1 = 5H7, D2 = 8H7 Note: Zero backlash, torsionally rigid, resiliently flexible and maintenance-free full metal coupling for transmitting angle synchronous rotary movement. The innovative slit structure makes possible a very good axial, radial and angular flexibility with low reset force. Ideal for servomotors. Assembly: Recommended shaft tolerances h7. Moment of inertia (10⁻³ kgm²) Max. axial shaft displacement ± Max. lateral...

23012 Beam couplings with removable clamping hub, stainless steel L1 Material: Stainless steel 1.4305. Version: Bright. Note for ordering: D1 and D2 are customer specific e.g. 23012-2025; D1 = 5H7, D2 = 8H7 Note: Zero backlash, torsionally rigid, resiliently flexible and maintenance-free full metal coupling for transmitting angle synchronous rotary movement. The innovative slit structure makes possible a very good axial, radial and angular flexibility with low reset force. Ideal for servomotors. Temperature range: -50 °C to +150 °C. Assembly: Recommended shaft tolerances h7. Moment of inertia...

23021 Elastomer dog couplings with conical hub and clamping ring (similar to DIN 69002) L On request: Hub bores D1 and D2 with separate tolerance class or range. Drawing reference: 1) elastomer spider Moment of inertia (10⁻³ kgm²) Static resistance to torsion Nm/arcmin Max. axial shaft displacement ± Max. lateral shaft displacement Radial spring stiffness N/mm Tightening torque of screws Nm Assembly: The shaft to hub bore fit should be a transition fit. The play should be max. 0.02 mm. i.e: shaft Ø 25 k6 bore Ø 25 G6. Bores smaller than D1/D2 min. are possible, however an optimal transfer of...

23022 Elastomer dog couplings with radial clamping hub Material: Spider polyurethane hardness Shore 98A. Hub aluminium. Version: Bright. Sample order: nlm 23022-008, D1 = 6 D2 = 6 (The hubs are supplied pre-bored). Assembly: The shaft to hub bore fit is a transition fit. The play should be min. 0.01 mm and max. 0.04 mm i.e. shaft: Ø 28 k6 hub: Ø 28 F6 Bores smaller than D1/D2 min. are possible, however an optimal transfer of the couplings nominal torque is no longer guaranteed. Note: Radial clamping of the hub for short mounting times. The couplings can be mounted completely assembled or a plug-in...

clamping with grub screw Material: Spider polyurethane hardness Shore 98A. Hub aluminium. Version: Bright. Sample order: nlm 23023-0020, D1 = 3 D2 = 3 (The hubs are supplied pre-bored). Note: Clamping the hub with a grub screw is a cost-effective alternative to the elastomer dog couplings with radial clamping hub (23022). Short mounting times. The couplings can be mounted completely assembled or plug-in mounting is also possible. Lightly oil the spider to ease assembly. Take note of the required tightening torque for the grub screw. To ease removal we recommend milling a flat on the shaft. Assembly:...