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MRA-G080-103D3

The MRA-G080-103D3 is a precision wire-draw (deflection pulley) mechanism designed for use with SICK wire-draw encoders. It features a retractable measuring wire system integrated with a spring-loaded arm for reliable contact and repeatable linear measurements—ideal for tracking the movement of materials like paper, film, or textiles.

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Technical Specifications
Measurement Characteristics

Measuring Range: 0 to approximately 3 meters

Maximum Wire Extension: Around 3.2 meters

Reproducibility: ≤ 0.2 mm

Linearity: ±2 mm

Hysteresis: ≤ 0.4 mm

Wire & Mechanics

Wire Draw per Encoder Revolution: Approx. 230 mm

Wire Material: Flexible stainless-steel (V4A / 1.4401)

Wire Diameter: 0.55 mm

Spring Return Force: About 3.3 N (at ~25 °C)

Wire Acceleration Capacity: Up to 10 m/s²

Max Wire Speed: Up to 6 m/s

Typical Service Life: Around 1,000,000 cycles (depending on conditions)

Construction & Environmental

Housing Material: Noryl plastic (robust polymer)

Protection Rating: IP50 (mechanically protected, but not sealed against dust or moisture)

Operating Temperature Range: –30 °C to +70 °C

Physical Attributes

Mechanism Weight: Roughly 250 g (excluding wire)

Wire Weight: Approximately 1.2 g per meter of wire length