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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Produkta apraksts Brand Pulses Per Revolution Shaft Style Shaft Diameter Encoder Reading Encoder Signal Shaft Length Mounting Type Index Output Maximum Operating Speed Mounting Hole Diameter Current Rating
Mechanical Incremental Encoder Switch, 1 Wurth Elektronik 15 - 6 mm Incremental - 20mm Through Hole - - - 10mA
Mechanical Incremental Encoder Switch, 1 Wurth Elektronik 15 - 6 mm Incremental - 20mm Through Hole - - - 10mA
Mechanical Incremental Encoder Switch, 2 Wurth Elektronik 20 - 6 mm Incremental - 20mm Through Hole - - - 10mA
Mechanical Incremental Encoder Switch, 2 Wurth Elektronik 20 - 6 mm Incremental - 20mm Through Hole - - - 10mA
Mechanical Incremental Encoder Switch, 8 Wurth Elektronik 8 - 6 mm Incremental - 20mm Through Hole - - - 10mA
Mechanical Incremental Encoder Switch, 8 Wurth Elektronik 8 - 6 mm Incremental - 20mm Through Hole - - - 10mA
CTS 8 Pulse Mechanical Rotary Encoder with a 6.35 mm Flat Shaft, Through Hole
  • RS noliktavas numurs 179-0687
  • Zīmols CTS
  • Ražotāja numurs 291V1022F832AB
CTS 8 Flat 6.35 mm - Digital 17.27mm Through Hole - 30rpm 0.76mm 2mA
Broadcom Absolute Mechanical Rotary Encoder with a 6 mm Plain Shaft (Not Indexed), Screw Mount
  • RS noliktavas numurs 178-2944
  • Zīmols Broadcom
  • Ražotāja numurs AEAT-6010-A06
Broadcom - Plain 6 mm Absolute - 8.5mm Screw Mount Not Indexed 12000rpm 0.13mm -
Alps Alpine 24 Pulse Mechanical Rotary Encoder Flat Shaft (Not Indexed), Through Hole Alps Electric 24 Flat - - - 15mm Through Hole Not Indexed - - -
Alps Alpine 12 Pulse Incremental Mechanical Rotary Encoder with a 3.6 mm Hollow Shaft (Not Indexed), Through Hole Alps Electric 12 Hollow 3.6 mm Incremental Digital Square Wave - Through Hole Not Indexed - 1 mm, 2.1 x 1.8 mm -
Alps Alpine 24 Pulse Incremental Mechanical Rotary Encoder with a 6 mm Flat Shaft (Not Indexed), Through Hole Alps Electric 24 Flat 6 mm Incremental Digital Square Wave 25mm Through Hole Not Indexed - 1 mm, 2.1 x 2 mm -
Alps Alpine 24 Pulse Incremental Mechanical Rotary Encoder with a 6 mm Flat Shaft (Not Indexed), Through Hole Alps Electric 24 Flat 6 mm Incremental Digital Square Wave 20mm Through Hole Not Indexed - 2.1 x 2 mm, 1 mm -
Alps Alpine 15 Pulse Incremental Mechanical Rotary Encoder Slot Shaft, Through Hole Alps Electric 15 Slot - Incremental Digital Square Wave 25mm Through Hole - - 2.1 x 1.8 mm, 1 mm -
Alps Alpine 12 Pulse Incremental Mechanical Rotary Encoder with a 6 mm Flat Shaft (Not Indexed), Through Hole Alps Electric 12 Flat 6 mm Incremental Digital Square Wave 25mm Through Hole Not Indexed - 1 mm, 2.1 x 2 mm -
TE Connectivity 24 Pulse Incremental Mechanical Rotary Encoder with a 6 mm Knurl Shaft (Not Indexed), Through Hole TE Connectivity 24 Knurl 6 mm Incremental Digital Square Wave 24mm Through Hole Not Indexed 60rpm 1.1mm -
Alps Alpine 12 Pulse Incremental Mechanical Rotary Encoder with a 6 mm Hollow Shaft (Not Indexed), Through Hole Alps Electric 12 Hollow 6 mm Incremental Digital Square Wave 8.5mm Through Hole Not Indexed - 1 mm, 2.1 x 2 mm -
TE Connectivity 24 Pulse Incremental Mechanical Rotary Encoder with a 6 mm Knurl Shaft (Not Indexed), Through Hole TE Connectivity 24 Knurl 6 mm Incremental Digital Square Wave 24mm Through Hole Not Indexed 60rpm 1.1mm -
Alps Alpine 18 Pulse Incremental Mechanical Rotary Encoder with a 6 mm Flat Shaft (Not Indexed), Through Hole Alps Electric 18 Flat 6 mm Incremental Digital Square Wave 20mm Through Hole Not Indexed - 1 mm, 2.6 x 1.5 mm -
Alps Alpine 12 Pulse Incremental Mechanical Rotary Encoder with a 6 mm Flat Shaft (Not Indexed), Through Hole Alps Electric 12 Flat 6 mm Incremental Digital Square Wave 20mm Through Hole Not Indexed - 2.1 x 2 mm, 1 mm -
Alps Alpine 24 Pulse Incremental Mechanical Rotary Encoder with a 6 mm Hollow Shaft (Not Indexed), Through Hole Alps Electric 24 Hollow 6 mm Incremental Digital Square Wave 8.5mm Through Hole Not Indexed - 2.1 x 2 mm, 1 mm -
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