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 729-5854
Référence fabricantEC12D1524403
MarqueAlps Alpine
1,02 €
Each
Unité
15 Flat 5.975 mm Incremental Digital Square Wave Through Hole 17.5mm Not Indexed - 1.05 mm, 2.1 mm, 2.15 x 2.05 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 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 265-2906
Référence fabricantEC11B1520206
MarqueAlps Alpine
1,32 €
Each
Unité
15 Slot - Incremental Digital Square Wave Through Hole 25mm - - 2.1 x 1.8 mm, 1 mm -
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 172-7599
Référence fabricantEC12E24202A2
MarqueAlps Alpine
0,392 €
Each (In a Tray of 110)
Unité
24 Flat - - - Through Hole 15mm Not Indexed - - -
N° de stock RS 167-4651
Référence fabricantPEC11R-4215K-S0024
MarqueBourns
1,121 €
Each (In a Bag of 75)
Unité
24 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 167-3572
Référence fabricantECW0J-B24-AC0006L
MarqueBourns
3,363 €
Each (In a Tray of 45)
Unité
6 Plain with Slot 6.35 mm Incremental Digital Square Wave Panel Mount 19mm Not Indexed 120rpm 9mm -
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 623-4186
Référence fabricantEC12E1220401
MarqueAlps Alpine
0,78 €
Each
Unité
12 Flat - - - Through Hole 20mm Not Indexed - - -
N° de stock RS 162-2502
Référence fabricantPEC12R-2225F-S0024
MarqueBourns
0,759 €
Each (In a Bag of 75)
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 729-5851
Référence fabricantEC12E2460802
MarqueAlps Alpine
1,71 €
Each
Unité
24 Flat 6 mm Incremental Digital Square Wave Through Hole 30mm Not Indexed - 2.1 x 2 mm, 1 mm -
N° de stock RS 172-6377
Référence fabricantEC11B1520206
MarqueAlps Alpine
1,244 €
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 623-4293
Référence fabricantEC11E15244C0
MarqueAlps Alpine
3,32 €
Each
Unité
15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm - - 2.6 x 1.5 mm, 1 mm -
N° de stock RS 168-0810
Référence fabricantDPL12SV2424A25K1
3,65 €
Each (In a Box of 250)
Unité
24 Knurl 6.8 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed 60rpm 1 mm, 1.1 mm -
N° de stock RS 789-9591
Référence fabricantPEC12R-2120F-S0012
MarqueBourns
1,01 €
Each
Unité
12 Flat 6 mm Incremental Digital Square Wave Through Hole 9mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
N° de stock RS 729-5606
Référence fabricantEC11E18244A5
MarqueAlps Alpine
3,68 €
Each
Unité
18 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 2.6 x 1.5 mm, 1 mm -
N° de stock RS 781-6815
Référence fabricantPEC11R-4215F-S0012
MarqueBourns
1,44 €
Each
Unité
12 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm - 60rpm 1mm -
N° de stock RS 663-3205
Référence fabricantDPL12SVN24A25K2
2,77 €
Each
Unité
24 Knurl 6.8 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed 60rpm 1 mm, 1.1 mm -
N° de stock RS 185-4446
Référence fabricant482020514001
3,55 €
Each (In a Pack of 2)
Unité
20 - 6 mm Incremental - Through Hole 20mm - - - 10mA