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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Omschrijving Prijs 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-stocknr. 172-6325
FabrikantnummerEC12E2420301
FabrikantAlps Alpine
1,152 €
Each (In a Tray of 125)
Aantal stuks
24 Hollow 6 mm Incremental Digital Square Wave Through Hole 8.5mm Not Indexed - 1 mm, 2.1 x 2 mm -
RS-stocknr. 172-7681
FabrikantnummerEC11B2020201
FabrikantAlps Alpine
1,288 €
Each (In a Tray of 70)
Aantal stuks
20 Flat - - - Through Hole 20mm Not Indexed - - -
RS-stocknr. 623-4237
FabrikantnummerEC12E2424407
FabrikantAlps Alpine
1,38 €
Each
Aantal stuks
24 Flat - - - Through Hole 14mm Not Indexed - - -
RS-stocknr. 623-4142
FabrikantnummerEC11B2020201
FabrikantAlps Alpine
1,32 €
Each
Aantal stuks
20 Flat - - - Through Hole 20mm Not Indexed - - -
RS-stocknr. 789-9541
FabrikantnummerPEC11R-4215K-N0024
FabrikantBourns
1,38 €
Each
Aantal stuks
24 Knurl 6 mm Incremental Digital Square Wave Through Hole 15mm Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS-stocknr. 789-9526
FabrikantnummerPEC11R-4020K-S0024
FabrikantBourns
1,31 €
Each
Aantal stuks
24 Knurl 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 2.6 x 1.8 mm, 1 mm -
RS-stocknr. 172-8098
FabrikantnummerEC12E2424407
FabrikantAlps Alpine
1,24 €
Each (In a Tray of 120)
Aantal stuks
24 Flat - - - Through Hole 14mm Not Indexed - - -
RS-stocknr. 172-6399
FabrikantnummerEC09E1524405
FabrikantAlps Alpine
2,699 €
Each (In a Tray of 70)
Aantal stuks
15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 1.2 mm, 2 mm -
RS-stocknr. 172-7707
FabrikantnummerEC11E152U402
FabrikantAlps Alpine
8,04 €
Each (In a Tray of 80)
Aantal stuks
15 Knurl 9 mm Incremental Digital Square Wave Through Hole 26.4mm Not Indexed - 1 mm, 2.6 x 1.5 mm -
RS-stocknr. 623-4079
FabrikantnummerEC11B15244A7
FabrikantAlps Alpine
5,43 €
Each
Aantal stuks
15 Flat - - - Through Hole 20mm Not Indexed - - -
RS-stocknr. 172-6387
FabrikantnummerEC11J1524413
FabrikantAlps Alpine
3,38 €
Each (In a Tray of 30)
Aantal stuks
15 Flat 5.975 mm Incremental Digital Square Wave Surface Mount 20mm Not Indexed - 2.1 mm, 1.6 x 1.9 mm -
RS-stocknr. 729-5808
FabrikantnummerEC12E2420301
FabrikantAlps Alpine
1,60 €
Each
Aantal stuks
24 Hollow 6 mm Incremental Digital Square Wave Through Hole 8.5mm Not Indexed - 2.1 x 2 mm, 1 mm -
RS-stocknr. 729-5678
FabrikantnummerEC11E152U402
FabrikantAlps Alpine
8,58 €
Each
Aantal stuks
15 Knurl 9 mm Incremental Digital Square Wave Through Hole 26.4mm Not Indexed - 2.6 x 1.5 mm, 1 mm -
RS-stocknr. 729-5836
FabrikantnummerEC12E2420801
FabrikantAlps Alpine
1,67 €
Each
Aantal stuks
24 Flat 6 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed - 2.1 x 2 mm, 1 mm -
RS-stocknr. 167-4660
FabrikantnummerPEC12R-4220F-S0024
FabrikantBourns
0,776 €
Each (In a Bag of 75)
Aantal stuks
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 100rpm 1 mm, 2.1 x 2 mm -
RS-stocknr. 729-5592
FabrikantnummerEC11E18244AU
FabrikantAlps Alpine
3,65 €
Each
Aantal stuks
18 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 2.6 x 1.5 mm, 1 mm -
RS-stocknr. 172-6324
FabrikantnummerEC12E2460802
FabrikantAlps Alpine
1,434 €
Each (In a Tray of 95)
Aantal stuks
24 Flat 6 mm Incremental Digital Square Wave Through Hole 30mm Not Indexed - 1 mm, 2.1 x 2 mm -
RS-stocknr. 789-9554
FabrikantnummerPEC11R-4220K-N0024
FabrikantBourns
1,28 €
Each
Aantal stuks
24 Knurl 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 2.6 x 1.8 mm, 1 mm -
RS-stocknr. 737-7773
FabrikantnummerPEC12R-4220F-S0024
FabrikantBourns
1,07 €
Each
Aantal stuks
24 Flat 6 mm Incremental Digital Square Wave Through Hole 9mm Not Indexed 100rpm 1 mm, 2.1 x 2 mm -
RS-stocknr. 623-4186
FabrikantnummerEC12E1220401
FabrikantAlps Alpine
0,78 €
Each
Aantal stuks
12 Flat - - - Through Hole 20mm Not Indexed - - -
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