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 189-4750
Référence fabricantAEAT-6012-A06
MarqueBroadcom
19,987 €
Each (In a Tube of 280)
Unité
1024 (Positions) - 6 mm Absolute - Screw Mount 8.5mm - 12000rpm 17mm 20mA
N° de stock RS 729-5628
Référence fabricantEC11K0925401
MarqueAlps Alpine
5,95 €
Each
Unité
9 Flat 5.975 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1.05 mm, 2.1 mm, 1.6 x 1.9 mm, 2.65 x 1.55 mm -
N° de stock RS 737-7745
Référence fabricantPEC11R-4125F-S0018
MarqueBourns
1,57 €
Each
Unité
18 Flat 6 mm Incremental Digital Square Wave - 25mm Not Indexed 60rpm 7mm -
N° de stock RS 172-8124
Référence fabricantSRGPWJ0200
MarqueAlps Alpine
1,966 €
Each (In a Tray of 200)
Unité
16 Hollow 18.5 mm Incremental Digital Square Wave Through Hole - Not Indexed - 1 mm, 2.55 mm, 2.5 x 1.6 mm -
N° de stock RS 167-5402
Référence fabricantPEC12R-4230F-N0024
MarqueBourns
0,528 €
Each (In a Bag of 75)
Unité
24 Flat 6 mm Incremental Digital Square Wave Through Hole 30mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
N° de stock RS 714-2693
Référence fabricantAEAT-6012-A06
MarqueBroadcom
26,19 €
Each
Unité
- Plain 6 mm Absolute - - 8.5mm - 12000rpm 0.13mm -
N° de stock RS 167-5309
Référence fabricantPEC12R-4230F-S0024
MarqueBourns
0,852 €
Each (In a Bag of 75)
Unité
24 Flat 6 mm Incremental Digital Square Wave Through Hole 30mm - 100rpm 1mm -
N° de stock RS 781-6827
Référence fabricantPEC11R-4120F-S0018
MarqueBourns
1,57 €
Each
Unité
18 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm - 60rpm 1mm -
N° de stock RS 167-4652
Référence fabricantPEC11R-4125F-S0018
MarqueBourns
1,197 €
Each (In a Bag of 75)
Unité
18 Flat 6 mm Incremental Digital Square Wave - 25mm Not Indexed 60rpm 7mm -
N° de stock RS 729-5911
Référence fabricantSRGP400100
MarqueAlps Alpine
1,57 €
Each
Unité
12 Hollow 9.23 mm Incremental Digital Square Wave Surface Mount - Not Indexed - 1.6mm -
N° de stock RS 185-4337
Référence fabricant482009514001
3,35 €
Each (In a Pack of 2)
Unité
8 - 6 mm Incremental - Through Hole 20mm - - - 10mA
N° de stock RS 167-5087
Référence fabricantPEC12R-2025F-S0024
MarqueBourns
0,461 €
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 167-5397
Référence fabricantPEC12R-4020F-S0024
MarqueBourns
0,852 €
Each (In a Bag of 75)
Unité
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
N° de stock RS 167-5400
Référence fabricantPEC12R-4220F-S0012
MarqueBourns
0,733 €
Each (In a Bag of 75)
Unité
12 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
N° de stock RS 663-3211
Référence fabricantDPL12SVN24A21F3
2,77 €
Each
Unité
24 Flat 6.8 mm Incremental Digital Square Wave Through Hole 21mm Not Indexed 60rpm 1 mm, 1.1 mm -
N° de stock RS 789-9664
Référence fabricantPEC12R-4230F-N0024
MarqueBourns
0,81 €
Each
Unité
24 Flat 6 mm Incremental Digital Square Wave Through Hole 30mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
N° de stock RS 167-5392
Référence fabricantPEC11R-4025F-N0024
MarqueBourns
0,992 €
Each (In a Bag of 75)
Unité
24 Flat 6 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
N° de stock RS 172-6381
Référence fabricantSRGP400100
MarqueAlps Alpine
1,419 €
Each (On a Reel of 800)
Unité
12 Hollow 9.23 mm Incremental Digital Square Wave Surface Mount - Not Indexed - 1.6mm -
N° de stock RS 663-3167
Référence fabricantDPL12VN24A20FR
4,28 €
Each
Unité
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1.1mm -
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