Mechanical Rotary Encoders

Mechanical rotary encoders, also called shaft encoders, are electro-mechanical devices that convert the angular motions (movement around fixed points) of rotary shafts into either analogue or digital signals.

What are mechanical rotary encoders used for?

Applications that require precision shaft rotation (movement around a specific point) make use of mechanical rotary encoders.

These include industrial control machinery in factories, rotating radar platforms in satellite structures or computer input devices like trackballs and mice.


Types of mechanical rotary encoders

Absolute encoders:

  • have tracking functions to determine specific shaft positioning points in industrial equipment like CNC machines, lathes and bore machines.
  • maintain positioning data even when power is cut from the system. When the system is switched on again it begins operating from the point where it stopped previously.


Incremental (relative) encoders:

  • record deviations in shaft position points over certain time frames. With each new time frame after power is cut and switched on again the encoder starts recording from a predetermined reference and measures the distance between the previous point and the current point.

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Description Price Pulses Per Revolution Shaft Style Shaft Diameter Encoder Reading Encoder Signal Mounting Type Shaft Length Index Output Maximum Operating Speed Mounting Hole Diameter Current Rating
RS Stock No. 263-2918
Mfr. Part No.EAW0J-B24-AE0128L
BrandBourns
kr 64,71
Each
Units
128 Plain with Slot 6.35 mm Absolute Digital Bracket Mount 19.05mm Not Indexed 120rpm 9mm -
RS Stock No. 167-3625
Mfr. Part No.EAW0J-B24-AE0128L
BrandBourns
kr 55,40
Each (In a Tray of 45)
Units
128 Plain with Slot 6.35 mm Absolute Digital Bracket Mount 19.05mm Not Indexed 120rpm 9mm -
RS Stock No. 178-2944
Mfr. Part No.AEAT-6010-A06
BrandBroadcom
kr 172,285
Each (In a Tray of 280)
Units
- Plain 6 mm Absolute - Screw Mount 8.5mm Not Indexed 12000rpm 0.13mm -
RS Stock No. 714-0234
Mfr. Part No.AEAT-6010-A06
BrandBroadcom
kr 212,46
Each
Units
- Plain 6 mm Absolute - Screw Mount 8.5mm Not Indexed 12000rpm 0.13mm -
RS Stock No. 172-6413
Mfr. Part No.EC20A1824401
kr 84,516
Each (In a Tray of 40)
Units
18 Flat 6 mm Incremental Digital Square Wave Through Hole 30mm Not Indexed - 1.2 mm, 2.6 x 1.5 mm -
RS Stock No. 729-5873
Mfr. Part No.EC20A1824401
kr 95,01
Each
Units
18 Flat 6 mm Incremental Digital Square Wave Through Hole 30mm Not Indexed - 1.2 mm, 2.6 x 1.5 mm -
RS Stock No. 729-5599
Mfr. Part No.EC11E09244AQ
kr 31,01
Each
Units
9 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.6 x 1.5 mm -
RS Stock No. 789-9490
Mfr. Part No.EMS22A50-D28-LT6
BrandBourns
kr 538,78
Each
Units
1024 (Position) Plain 3.17 mm Absolute Digital Square Wave Through Hole 22.23mm Not Indexed 10000rpm 10.67mm -
RS Stock No. 167-5430
Mfr. Part No.EMS22A50-D28-LT6
BrandBourns
kr 383,278
Each (In a Box of 42)
Units
1024 (Position) Plain 3.17 mm Absolute Digital Square Wave Through Hole 22.23mm Not Indexed 10000rpm 10.67mm -
RS Stock No. 263-2839
Mfr. Part No.ECW0J-B24-AC0006L
BrandBourns
kr 38,88
Each
Units
6 Plain with Slot 6.35 mm Incremental Digital Square Wave Panel Mount 19mm Not Indexed 120rpm 9mm -
RS Stock No. 172-8066
Mfr. Part No.EC16B2410408
kr 13,386
Each (In a Tray of 60)
Units
24 Flat 6 mm Incremental - Through Hole 25mm - - 1.2 mm, 2 x 2.1 mm -
RS Stock No. 167-5383
Mfr. Part No.PEC11R-4215F-N0024
BrandBourns
kr 9,575
Each (In a Bag of 75)
Units
24 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm - 60rpm 1mm -
RS Stock No. 781-6821
Mfr. Part No.PEC11R-4215F-N0024
BrandBourns
kr 12,86
Each
Units
24 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm - 60rpm 1mm -
RS Stock No. 167-4653
Mfr. Part No.PEC11R-4215F-S0024
BrandBourns
kr 10,846
Each (In a Bag of 75)
Units
24 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS Stock No. 781-6824
Mfr. Part No.PEC11R-4015F-N0024
BrandBourns
kr 12,86
Each
Units
24 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm - 60rpm 1mm -
RS Stock No. 167-5384
Mfr. Part No.PEC11R-4015F-N0024
BrandBourns
kr 9,575
Each (In a Bag of 75)
Units
24 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm - 60rpm 1mm -
RS Stock No. 265-1723
Mfr. Part No.EC16B2410408
kr 17,15
Each
Units
24 Flat 6 mm Incremental - Through Hole 25mm - - 1.2 mm, 2 x 2.1 mm 0.5mA
RS Stock No. 167-4654
Mfr. Part No.PEC11R-4220F-N0012
BrandBourns
kr 10,943
Each (In a Bag of 75)
Units
12 Flat 6 mm Incremental Digital Square Wave - 20mm Not Indexed 60rpm 7mm -
RS Stock No. 167-3572
Mfr. Part No.ECW0J-B24-AC0006L
BrandBourns
kr 28,922
Each (In a Tray of 45)
Units
6 Plain with Slot 6.35 mm Incremental Digital Square Wave Panel Mount 19mm Not Indexed 120rpm 9mm -
RS Stock No. 737-7748
Mfr. Part No.PEC11R-4215F-S0024
BrandBourns
kr 15,85
Each
Units
24 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
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