Omron E69-C06M — Metal Encoder Coupling, 6 mm
SKU: E69-C06MUSD 39.00
Metal shaft coupling for E6B2-C / E6C2-C rotary encoders, 6 mm bore, 19.1 mm OD, H8 tolerance, side or flange mount.
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Product Overview
The Omron E69-C06M is the metal shaft coupling for E6B2-C and E6C2-C rotary encoders with a 6 mm shaft diameter. It is manufactured by Omron Corporation. Hengyixin Automation ships this sensor from our Xiamen warehouse with a 30-day DOA return window and a datasheet PDF included in the box.
The coupling has a 6 mm bore on the encoder side (H8 tolerance) and a 19.1 mm outer diameter, with helical slots that give the metal bellows its torsional stiffness and small-parallel-offset tolerance. Choose the metal E69-C06M over the resin E69-C06B when the encoder is driven by a motor with rapid acceleration, high starting torque, or significant shaft misalignment.
The E69-C68B and E69-C610B resin variants accept 6/8 mm or 6/10 mm stepped shafts for applications where the drive and encoder shafts are different diameters.
Key Features
- 6 mm bore, 19.1 mm OD, H8 tolerance
- Absorbs 0.1 mm parallel misalignment and 1 degree angular misalignment
- Compatible with all E6B2-C / E6C2-C shaft diameters from 6 to 10 mm
- Metal bellows coupling for E6B2-C and E6C2-C rotary encoders
- SKU: E69-C06M
- Series: E69-series rotary encoder couplings
Best-Fit Applications
- Connecting an E6B2-CWZ6C encoder to a stepper or servo motor shaft.
- Belt-driven encoder mounting on a conveyor with slight shaft offset.
- Hand-off encoder mounting driven by a chain or timing belt.
Buying Checklist
- Confirm the encoder shaft diameter is 6 mm - for 8 mm or 10 mm shafts, choose E69-C08M or E69-C10M respectively.
- Choose E69-C06B (resin) when the encoder sees smooth, low-torque rotation - the resin version is cheaper and adequate for most conveyor applications.
- Allow for radial and angular misalignment up to 0.1 mm / 1 degree - the metal bellows handles small offsets but not gross misalignment.
Technical Specifications
| Model | E69-C06M |
|---|---|
| Series | E69-series rotary encoder couplings |
| Bore Diameter | 6 mm, H8 tolerance |
| Outer Diameter | 19.1 mm |
| Material | Metal bellows with helical slots |
| Compatible Encoders | E6B2-C and E6C2-C rotary encoders with 6 mm shafts |
| Misalignment Tolerance | 0.1 mm parallel max, 1 degree angular max |
| Mounting | M3 set screws on both coupling halves |
| Length | Approx 22 mm engaged length |
| Operating Temperature | -10 to +80 degC (limited by encoder body rating) |
FAQ for E69-C06M
What is the difference between E69-C06M and E69-C06B?
Both are 6 mm bore encoder couplings. The C06M is metal bellows construction, designed for high starting torque, rapid acceleration, and long service life. The C06B is a resin moulding, suitable for smooth low-torque rotation and lower cost. Pick the C06M for servo or stepper applications where the coupling sees torque pulses; pick the C06B for conveyor or fan applications with steady rotation.
Which rotary encoders does the E69-C06M fit?
The E69-C06M fits the E6B2-C and E6C2-C rotary encoders with 6 mm shaft diameters. The E6B2-C family has 40 mm or 50 mm body diameters and 6 mm shafts; the E6C2-C has 50 mm diameter and 6 mm shafts. For other encoder families or shaft diameters, consult the E69-series selection table.
How much misalignment can the E69-C06M absorb?
The metal bellows design absorbs up to 0.1 mm of parallel misalignment and up to 1 degree of angular misalignment between the encoder shaft and the drive shaft. Larger offsets will deform the bellows and cause premature wear. Always measure the alignment with a dial indicator before tightening the set screws.
What torque should the E69-C06M set screws be tightened to?
Tighten the M3 set screws on each coupling half to about 1.0 N.m. Use a calibrated torque driver - hand-tight is usually too loose and a normal screwdriver is usually too tight. After tightening, rotate the encoder shaft by hand to confirm there is no binding.
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