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 789-9541
Référence fabricantPEC11R-4215K-N0024
MarqueBourns
1,38 €
Each
Unité
24 Knurl 6 mm Incremental Digital Square Wave Through Hole 15mm Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
N° de stock RS 623-4142
Référence fabricantEC11B2020201
MarqueAlps Alpine
1,32 €
Each
Unité
20 Flat - - - Through Hole 20mm Not Indexed - - -
N° de stock RS 623-4237
Référence fabricantEC12E2424407
MarqueAlps Alpine
2,96 €
Each
Unité
24 Flat - - - Through Hole 14mm Not Indexed - - -
N° de stock RS 172-8065
Référence fabricantEC12E2420801
MarqueAlps Alpine
0,857 €
Each (In a Tray of 95)
Unité
24 Flat 6 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed - 1 mm, 2.1 x 2 mm -
N° de stock RS 729-5808
Référence fabricantEC12E2420301
MarqueAlps Alpine
1,60 €
Each
Unité
24 Hollow 6 mm Incremental Digital Square Wave Through Hole 8.5mm Not Indexed - 2.1 x 2 mm, 1 mm -
N° de stock RS 729-5836
Référence fabricantEC12E2420801
MarqueAlps Alpine
1,67 €
Each
Unité
24 Flat 6 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed - 2.1 x 2 mm, 1 mm -
N° de stock RS 172-7681
Référence fabricantEC11B2020201
MarqueAlps Alpine
1,288 €
Each (In a Tray of 70)
Unité
20 Flat - - - Through Hole 20mm Not Indexed - - -
N° de stock RS 623-4136
Référence fabricantEC11B202440M
MarqueAlps Alpine
3,11 €
Each
Unité
20 Flat - - - Through Hole 20mm Not Indexed - - -
N° de stock RS 172-8098
Référence fabricantEC12E2424407
MarqueAlps Alpine
1,879 €
Each (In a Tray of 120)
Unité
24 Flat - - - Through Hole 14mm Not Indexed - - -
N° de stock RS 263-2839
Référence fabricantECW0J-B24-AC0006L
MarqueBourns
4,08 €
Each
Unité
6 Plain with Slot 6.35 mm Incremental Digital Square Wave Panel Mount 19mm Not Indexed 120rpm 9mm -
N° de stock RS 737-7742
Référence fabricantPEC11R-4215K-S0024
MarqueBourns
1,44 €
Each
Unité
24 Knurl 6 mm Incremental Digital Square Wave Through Hole 15mm Not Indexed 60rpm 2.6 x 1.8 mm, 1 mm -
N° de stock RS 729-5536
Référence fabricantEC05E1220401
MarqueAlps Alpine
2,08 €
Each
Unité
12 Hollow 2.2 mm Incremental - Bracket Mount, Surface Mount - Not Indexed - 0.62mm -
N° de stock RS 623-4215
Référence fabricantEC12E24202A2
MarqueAlps Alpine
0,43 €
Each
Unité
24 Flat - - - Through Hole 15mm Not Indexed - - -
N° de stock RS 172-6303
Référence fabricantEC12E1220401
MarqueAlps Alpine
0,798 €
Each (In a Tray of 120)
Unité
12 Flat - - - Through Hole 20mm Not Indexed - - -
N° de stock RS 172-8083
Référence fabricantEC05E1220401
MarqueAlps Alpine
1,355 €
Each (On a Reel of 2000)
Unité
12 Hollow 2.2 mm Incremental - Bracket Mount, Surface Mount - Not Indexed - 0.62mm -
N° de stock RS 789-9523
Référence fabricantPEC11R-4115K-S0018
MarqueBourns
1,57 €
Each
Unité
18 Knurl 6 mm Incremental Digital Square Wave Through Hole 15mm Not Indexed 60rpm 2.6 x 1.8 mm, 1 mm -
N° de stock RS 789-9582
Référence fabricantPEC11S-929K-N0015
MarqueBourns
2,05 €
Each
Unité
15 Knurl 6 mm Incremental Digital Square Wave Surface Mount 9mm Not Indexed 60rpm 2.5mm -
N° de stock RS 167-5390
Référence fabricantPEC11R-4115K-S0018
MarqueBourns
1,197 €
Each (In a Bag of 75)
Unité
18 Knurl 6 mm Incremental Digital Square Wave Through Hole 15mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
N° de stock RS 789-9614
Référence fabricantPEC12R-2225F-S0024
MarqueBourns
1,06 €
Each
Unité
24 Flat 6 mm Incremental Digital Square Wave Through Hole 14mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
N° de stock RS 623-4186
Référence fabricantEC12E1220401
MarqueAlps Alpine
0,78 €
Each
Unité
12 Flat - - - Through Hole 20mm Not Indexed - - -