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 Prix 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
N° de stock RS 172-8066
Référence fabricantEC16B2410408
MarqueAlps Alpine
1,343 €
Each (In a Tray of 60)
Unité
24 Flat 6 mm Incremental - Through Hole 25mm - - 1.2 mm, 2 x 2.1 mm -
N° de stock RS 265-1723
Référence fabricantEC16B2410408
MarqueAlps Alpine
1,72 €
Each
Unité
24 Flat 6 mm Incremental - Through Hole 25mm - - 2 x 2.1 mm, 1.2 mm 0.5mA
N° de stock RS 265-1739
Référence fabricantEC16B242040R
MarqueAlps Alpine
1,10 €
Each
Unité
24 Flat 6 mm Incremental - Through Hole 25mm - - 1.2 mm, 2 x 2.1 mm -
N° de stock RS 172-6320
Référence fabricantEC16B242040R
MarqueAlps Alpine
1,167 €
Each (In a Tray of 60)
Unité
24 Flat 6 mm Incremental - Through Hole 25mm - - 1.2 mm, 2 x 2.1 mm -
N° de stock RS 789-9490
Référence fabricantEMS22A50-D28-LT6
MarqueBourns
39,51 €
Each
Unité
1024 (Position) Plain 3.17 mm Absolute Digital Square Wave Through Hole 22.23mm Not Indexed 10000rpm 10.67mm -
N° de stock RS 167-5430
Référence fabricantEMS22A50-D28-LT6
MarqueBourns
27,209 €
Each (In a Box of 42)
Unité
1024 (Position) Plain 3.17 mm Absolute Digital Square Wave Through Hole 22.23mm Not Indexed 10000rpm 10.67mm -
N° de stock RS 729-5564
Référence fabricantEC11B15242AF
MarqueAlps Alpine
5,37 €
Each
Unité
15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 1.8 mm -
N° de stock RS 172-8134
Référence fabricantEC11B15242AF
MarqueAlps Alpine
4,543 €
Each (In a Tray of 70)
Unité
15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 1.8 mm -
N° de stock RS 167-5385
Référence fabricantPEC11R-4220K-S0024
MarqueBourns
1,078 €
Each (In a Bag of 75)
Unité
24 Knurl 6 mm Incremental Digital Square Wave Through Hole 20mm - 60rpm 1mm -
N° de stock RS 781-6830
Référence fabricantPEC11R-4220K-S0024
MarqueBourns
1,38 €
Each
Unité
24 Knurl 6 mm Incremental Digital Square Wave Through Hole 20mm - 60rpm 1mm -
N° de stock RS 167-4659
Référence fabricantPEC11R-4220F-S0024
MarqueBourns
1,046 €
Each (In a Bag of 75)
Unité
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
N° de stock RS 737-7767
Référence fabricantPEC11R-4220F-S0024
MarqueBourns
1,34 €
Each
Unité
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
N° de stock RS 172-6422
Référence fabricantEC11EBB24C03
MarqueAlps Alpine
12,424 €
Each (In a Tray of 70)
Unité
15 Flat (Inner Shaft), Slot (Outer Shaft) 3.5 (Inner Shaft) mm, 6 (Outer Shaft) mm Incremental Digital Square Wave Through Hole 25mm Not Indexed - 1 mm, 2.6 x 1.5 mm -
N° de stock RS 729-5703
Référence fabricantEC11EBB24C03
MarqueAlps Alpine
13,54 €
Each
Unité
15 Flat (Inner Shaft), Slot (Outer Shaft) 3.5 (Inner Shaft) mm, 6 (Outer Shaft) mm Incremental Digital Square Wave Through Hole 25mm Not Indexed - 1 mm, 2.6 x 1.5 mm -
N° de stock RS 729-5895
Référence fabricantSRGAV80601
MarqueAlps Alpine
1,69 €
Each
Unité
8 (Positions) Hollow 5 mm Absolute Gray Code Through Hole - Not Indexed - 0.9 mm, 1.5 mm, 1.55 mm -
N° de stock RS 172-7688
Référence fabricantSRGAV80601
MarqueAlps Alpine
1,705 €
Each (In a Tray of 84)
Unité
8 (Positions) Hollow 5 mm Absolute Gray Code Through Hole - Not Indexed - 0.9 mm, 1.5 mm, 1.55 mm -
N° de stock RS 172-8123
Référence fabricantEC11B152420G
MarqueAlps Alpine
3,279 €
Each (In a Tray of 70)
Unité
15 Slot - Incremental Digital Square Wave Through Hole 25mm - - 1 mm, 2.1 x 1.8 mm -
N° de stock RS 263-2930
Référence fabricantEC11B152420G
MarqueAlps Alpine
3,74 €
Each
Unité
15 Slot - Incremental Digital Square Wave Through Hole 25mm - - 2.1 x 1.8 mm, 1 mm -
N° de stock RS 167-5401
Référence fabricantPEC12R-4217F-S0012
MarqueBourns
1,01 €
Each (In a Bag of 75)
Unité
12 Flat 6 mm Incremental Digital Square Wave Through Hole 17.5mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
N° de stock RS 729-5817
Référence fabricantEC12E24404A8
MarqueAlps Alpine
1,26 €
Each
Unité
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 2 mm -