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Rotary Encoders

Accessories

Couplings

Coupling Materials and Characteristics

OMRON provides two types of couplings for different

application conditions: Resin and metal. Select the best type

for the application.

Comparison of Specifications for 6-mm Shafts

Note: Note: The above specifications are for the coupling by itself. When the

coupling is used together with a Rotary Encoder, allow for the precautions

for all Rotary Encoders and for the specifications of the Encoder.

Characteristics

Coupling Suitability Table

❍ : Suitable and provided with product, Δ: Suitable and sold separately, ---: Not suitable.

*Tolerance conforms to JIS standard: JIS B 0401.

➜Refer to page 2.

As a general rule, use metal couplings for high resolution and

resin couplings for low resolution. (As a rough guide, a high

resolution is one that exceeds 3,600 ppr.)

Even for applications requiring relatively low resolution, a metal

coupling will provide more reliability in applications involving

rapid acceleration/deceleration or for Encoders with high

starting torque.

Material

Machine specification

Resin

(standard type)

Metal

(aluminum, helical)

Eccentricity (mm)

0.5

0.25

Eccentricity (degrees)

55

Deviation in shaft

direction (mm)

±0.4

±0.25

Allowable torque (N·m)

0.8

1

Torsion rigidity (Nm/rad)

16

8.2

Moment of inertia (kg·m2)

1.2

× 10−7

7

× 10−7

Weight (g)

413

Material

Advantages

Disadvantages

Resin

(standard type)

•Low cost.

• Easy shaft alignment when mounting.

• Lightweight and low moment of inertia, placing a smaller

load on the drive system.

• Low torsion rigidity and thus not suitable for high

resolution.

• Mounting is possible even if the shafts are greatly

misaligned, which can cause damage from fatigue over

long periods of application.

Metal

(aluminum, helical)

• High torsion rigidity and thus suitable for high resolution.

• Transmitted allowable torque is large.

• High cost.

• Heavy and thus place a large load on the drive system.

• The allowable shaft misalignment is small, so accurate

positioning is required when mounting.

Couplings

Specification

Resin, standard type

Resin,

different end diameter

Metal

Rotary Encoder

Model/shaft dia.

Shaft interior

(tolerance

*)

exterior dia.

2 dia.

(Height: 8),

9 dia.

4 dia.

(Height: 8),

13 dia.

6 dia.

(Height: 8),

15 dia.

8 dia.

(Height: 8),

19 dia.

10 dia.

(Height: 8),

22 dia.

6 dia., 8 dia.,

(Height: 8),

19 dia.

6 dia., 10 dia.,

(Height: 8),

22 dia.

6 dia.

(Height: 8),

19.1 dia.

10 dia.

(Height: 8),

25.4 dia.

Model

E69-C02B

E69-C04B

E69-C06B

E69-C08B

E69-C10B

E69-C68B

E69-C610B

E69-C06M

E69-C10M

E6A2-C

4 dia.

---

❍

---

---

---

---

---

---

---

E6B2-C

6 dia.

---

---

❍

---

---

ΔΔ

Δ

---

E6C2-C

6 dia.

---

---

Δ

---

---

ΔΔ

Δ

---

E6C3-C

8 dia.

---

---

---

Δ

---

Δ

---

---

---

E6D-C

6 dia.

---

---

❍

---

---

ΔΔ

Δ

---

E6F-C

10 dia.

---

---

---

---

Δ

---

Δ

---

Δ

E6H-C

Hollow shaft interior dia.: 8 mm

Hollow-shaft Model; Coupling not required.

E6J-C

2 dia.

❍

---

---

---

---

---

---

---

---

E6CP-A

6 dia.

---

---

❍ Sold

separately

only for

E6CP-

AG5C-C.

---

---

ΔΔ

Δ

---

E6C3-A

8 dia.

---

---

---

Δ

---

Δ

---

---

---

E6F-A

10 dia.

---

---

---

---

❍ Only

Pre-wired

Models

---

Δ

---

Δ

E6J-A

4 dia.

---

❍

---

---

---

---

---

---

---

CSM_RotaryEncoder_OP_E_8_1