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 Price 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庫存編號 737-7767
製造零件編號PEC11R-4220F-S0024
BrandBourns
HK$12.46
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS庫存編號 167-4659
製造零件編號PEC11R-4220F-S0024
BrandBourns
HK$10.87
個 (以毎袋:75)
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS庫存編號 167-4650
製造零件編號PEC11R-4015F-S0024
BrandBourns
HK$10.87
個 (以毎袋:75)
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS庫存編號 789-9513
製造零件編號PEC11R-4020F-N0012
BrandBourns
HK$12.55
單位
12 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS庫存編號 737-7758
製造零件編號PEC11R-4220F-S0012
BrandBourns
HK$11.97
單位
12 Flat 6 mm Incremental Digital Square Wave - 20mm Not Indexed 60rpm 7mm -
RS庫存編號 167-4660
製造零件編號PEC12R-4220F-S0024
BrandBourns
HK$8.04
個 (以毎袋:75)
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 100rpm 1 mm, 2.1 x 2 mm -
RS庫存編號 167-4656
製造零件編號PEC11R-4220F-S0012
BrandBourns
HK$10.87
個 (以毎袋:75)
單位
12 Flat 6 mm Incremental Digital Square Wave - 20mm Not Indexed 60rpm 7mm -
RS庫存編號 167-5088
製造零件編號PEC11R-4020F-N0012
BrandBourns
HK$10.95
個 (以毎袋:75)
單位
12 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS庫存編號 167-5389
製造零件編號PEC11R-4020F-N0024
BrandBourns
HK$10.868
個 (以毎袋:75)
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS庫存編號 737-7739
製造零件編號PEC11R-4015F-S0024
BrandBourns
HK$13.95
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS庫存編號 263-2918
製造零件編號EAW0J-B24-AE0128L
BrandBourns
HK$70.66
單位
128 Plain with Slot 6.35 mm Absolute Digital Bracket Mount 19.05mm Not Indexed 120rpm 9mm -
RS庫存編號 789-9517
製造零件編號PEC11R-4020F-N0024
BrandBourns
HK$12.90
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS庫存編號 167-3625
製造零件編號EAW0J-B24-AE0128L
BrandBourns
HK$56.768
Each (In a Tray of 45)
單位
128 Plain with Slot 6.35 mm Absolute Digital Bracket Mount 19.05mm Not Indexed 120rpm 9mm -
RS庫存編號 789-9490
製造零件編號EMS22A50-D28-LT6
BrandBourns
HK$285.90
單位
1024 (Position) Plain 3.17 mm Absolute Digital Square Wave Through Hole 22.23mm Not Indexed 10000rpm 10.67mm -
RS庫存編號 167-5430
製造零件編號EMS22A50-D28-LT6
BrandBourns
HK$283.07
個 (以毎盒:42)
單位
1024 (Position) Plain 3.17 mm Absolute Digital Square Wave Through Hole 22.23mm Not Indexed 10000rpm 10.67mm -
RS庫存編號 737-7773
製造零件編號PEC12R-4220F-S0024
BrandBourns
HK$8.25
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 14mm Not Indexed 100rpm 1 mm, 2.1 x 2 mm -
RS庫存編號 737-7754
製造零件編號PEC11R-4220F-N0024
BrandBourns
HK$11.80
單位
24 Flat 6 mm Incremental Digital Square Wave - 20mm Not Indexed 60rpm 7mm -
RS庫存編號 737-7732
製造零件編號PEC11R-4020F-S0024
BrandBourns
HK$13.95
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS庫存編號 167-5392
製造零件編號PEC11R-4025F-N0024
BrandBourns
HK$9.58
個 (以毎袋:75)
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS庫存編號 167-5394
製造零件編號PEC11R-4220K-N0024
BrandBourns
HK$8.56
個 (以毎袋:75)
單位
24 Knurl 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -