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 263-2930
製造零件編號EC11B152420G
TWD155.00
單位
15 Slot - Incremental Digital Square Wave Through Hole 25mm - - 1 mm, 2.1 x 1.8 mm -
RS庫存編號 172-7669
製造零件編號EC11E15244G1
TWD111.90
Each (In a Tray of 120)
單位
15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.6 x 1.5 mm -
RS庫存編號 172-7599
製造零件編號EC12E24202A2
TWD23.60
Each (In a Tray of 110)
單位
24 Flat - - - Through Hole 15mm Not Indexed - - -
RS庫存編號 205-9736
製造零件編號PEC11H-4120F-S0020
BrandBourns
TWD66.80
Each (In a Tray of 75)
單位
20 - 6 mm Incremental Digital Square Wave PCB Mount 20mm Not Indexed - - -
RS庫存編號 729-5851
製造零件編號EC12E2460802
TWD76.00
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 30mm Not Indexed - 1 mm, 2.1 x 2 mm -
RS庫存編號 663-3167
製造零件編號DPL12VN24A20FR
TWD167.00
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1.1mm -
RS庫存編號 737-7764
製造零件編號PEC11R-4230F-S0024
BrandBourns
TWD68.00
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 30mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS庫存編號 663-3230
製造零件編號DPL12SV2424A25K3
TWD277.00
單位
24 Knurl 6.8 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed 60rpm 1 mm, 1.1 mm -
RS庫存編號 737-7751
製造零件編號PEC11R-4220F-N0012
BrandBourns
TWD58.00
單位
12 Flat 6 mm Incremental Digital Square Wave - 20mm Not Indexed 60rpm 7mm -
RS庫存編號 167-5087
製造零件編號PEC12R-2025F-S0024
BrandBourns
TWD28.70
個 (以毎袋:75)
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 14mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
RS庫存編號 729-5918
製造零件編號SRGP300100
TWD86.00
單位
9 Hollow 7.6 mm Incremental Digital Square Wave Surface Mount - Not Indexed - 1.6mm -
RS庫存編號 172-7671
製造零件編號SRGP400200
TWD48.00
個 (在毎卷:800)
單位
12 Hollow 9.23 mm Incremental Digital Square Wave Surface Mount - Not Indexed - 1.6mm -
RS庫存編號 729-5722
製造零件編號EC11J1524413
TWD183.00
單位
15 Flat 5.975 mm Incremental Digital Square Wave Surface Mount 20mm Not Indexed - 1.6 x 1.9 mm, 2.1 mm -
RS庫存編號 185-4446
製造零件編號482020514001
TWD146.50
/個 (每包:2個)
單位
20 - 6 mm Incremental - Through Hole 20mm - - - 10mA
RS庫存編號 167-4649
製造零件編號PEC11R-4115F-S0018
BrandBourns
TWD37.60
個 (以毎袋:75)
單位
18 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 172-8065
製造零件編號EC12E2420801
TWD56.60
Each (In a Tray of 95)
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed - 1 mm, 2.1 x 2 mm -
RS庫存編號 663-3182
製造零件編號DPL12V2424A24KG
TWD166.00
單位
24 Knurl 6 mm Incremental Digital Square Wave Through Hole 24mm Not Indexed 60rpm 1.1mm -
RS庫存編號 729-5911
製造零件編號SRGP400100
TWD61.00
單位
12 Hollow 9.23 mm Incremental Digital Square Wave Surface Mount - Not Indexed - 1.6mm -
RS庫存編號 167-5309
製造零件編號PEC12R-4230F-S0024
BrandBourns
TWD31.60
個 (以毎袋:75)
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 30mm - 100rpm 1mm -
RS庫存編號 729-5615
製造零件編號EC11E1834403
TWD153.00
單位
18 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.6 x 1.5 mm -