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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Beskrivning Pris 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-artikelnummer 172-6320
Tillv. art.nrEC16B242040R
VarumärkeAlps Alpine
12,063 kr
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24 Flat 6 mm Incremental - Through Hole 25mm - - 1.2 mm, 2 x 2.1 mm -
RS-artikelnummer 167-3625
Tillv. art.nrEAW0J-B24-AE0128L
VarumärkeBourns
57,456 kr
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128 Plain with Slot 6.35 mm Absolute Digital Bracket Mount 19.05mm Not Indexed 120rpm 9mm -
RS-artikelnummer 265-1739
Tillv. art.nrEC16B242040R
VarumärkeAlps Alpine
11,97 kr
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24 Flat 6 mm Incremental - Through Hole 25mm - - 1.2 mm, 2 x 2.1 mm -
RS-artikelnummer 263-2918
Tillv. art.nrEAW0J-B24-AE0128L
VarumärkeBourns
78,64 kr
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128 Plain with Slot 6.35 mm Absolute Digital Bracket Mount 19.05mm Not Indexed 120rpm 9mm -
RS-artikelnummer 729-5703
Tillv. art.nrEC11EBB24C03
VarumärkeAlps Alpine
224,07 kr
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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 -
RS-artikelnummer 172-6422
Tillv. art.nrEC11EBB24C03
VarumärkeAlps Alpine
128,467 kr
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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 -
RS-artikelnummer 172-8066
Tillv. art.nrEC16B2410408
VarumärkeAlps Alpine
12,397 kr
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24 Flat 6 mm Incremental - Through Hole 25mm - - 1.2 mm, 2 x 2.1 mm -
RS-artikelnummer 265-1723
Tillv. art.nrEC16B2410408
VarumärkeAlps Alpine
16,85 kr
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24 Flat 6 mm Incremental - Through Hole 25mm - - 1.2 mm, 2 x 2.1 mm 0.5mA
RS-artikelnummer 172-8098
Tillv. art.nrEC12E2424407
VarumärkeAlps Alpine
14,31 kr
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24 Flat - - - Through Hole 14mm Not Indexed - - -
RS-artikelnummer 623-4237
Tillv. art.nrEC12E2424407
VarumärkeAlps Alpine
25,02 kr
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24 Flat - - - Through Hole 14mm Not Indexed - - -
RS-artikelnummer 167-5385
Tillv. art.nrPEC11R-4220K-S0024
VarumärkeBourns
12,765 kr
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24 Knurl 6 mm Incremental Digital Square Wave Through Hole 20mm - 60rpm 1mm -
RS-artikelnummer 781-6830
Tillv. art.nrPEC11R-4220K-S0024
VarumärkeBourns
17,89 kr
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24 Knurl 6 mm Incremental Digital Square Wave Through Hole 20mm - 60rpm 1mm -
RS-artikelnummer 729-5564
Tillv. art.nrEC11B15242AF
VarumärkeAlps Alpine
55,53 kr
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15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 1.8 mm -
RS-artikelnummer 167-5392
Tillv. art.nrPEC11R-4025F-N0024
VarumärkeBourns
9,931 kr
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24 Flat 6 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS-artikelnummer 172-8065
Tillv. art.nrEC12E2420801
VarumärkeAlps Alpine
8,862 kr
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24 Flat 6 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed - 1 mm, 2.1 x 2 mm -
RS-artikelnummer 167-5399
Tillv. art.nrPEC12R-4025F-S0024
VarumärkeBourns
8,924 kr
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24 Flat 6 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
RS-artikelnummer 729-5889
Tillv. art.nrEM20B4014000
VarumärkeAlps Alpine
387,03 kr
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40 Flat 4 mm Incremental Digital Square Wave Through Hole 16mm Not Indexed - 0.6 mm, 2.6 x 1.8 mm -
RS-artikelnummer 172-8123
Tillv. art.nrEC11B152420G
VarumärkeAlps Alpine
33,90 kr
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15 Slot - Incremental Digital Square Wave Through Hole 25mm - - 1 mm, 2.1 x 1.8 mm -
RS-artikelnummer 729-5592
Tillv. art.nrEC11E18244AU
VarumärkeAlps Alpine
37,74 kr
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18 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.6 x 1.5 mm -
RS-artikelnummer 789-9649
Tillv. art.nrPEC12R-4025F-S0024
VarumärkeBourns
11,48 kr
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24 Flat 6 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -