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 172-8042
製造零件編號EC12E24204A9
TWD37.30
Each (In a Tray of 120)
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 167-5088
製造零件編號PEC11R-4020F-N0012
BrandBourns
TWD43.40
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 167-4652
製造零件編號PEC11R-4125F-S0018
BrandBourns
TWD49.20
個 (以毎袋:75)
單位
18 Flat 6 mm Incremental Digital Square Wave - 25mm Not Indexed 60rpm 7mm -
RS庫存編號 167-5402
製造零件編號PEC12R-4230F-N0024
BrandBourns
TWD22.70
個 (以毎袋:75)
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 30mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
RS庫存編號 172-8124
製造零件編號SRGPWJ0200
TWD143.80
Each (In a Tray of 200)
單位
16 Hollow 18.5 mm Incremental Digital Square Wave Through Hole - Not Indexed - 1 mm, 2.5 x 1.6 mm, 2.55 mm -
RS庫存編號 729-5895
製造零件編號SRGAV80601
TWD148.00
單位
8 (Positions) Hollow 5 mm Absolute Gray Code Through Hole - Not Indexed - 0.9 mm, 1.5 mm, 1.55 mm -
RS庫存編號 781-6827
製造零件編號PEC11R-4120F-S0018
BrandBourns
TWD65.00
單位
18 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm - 60rpm 1mm -
RS庫存編號 167-4648
製造零件編號PEC11R-4020F-S0024
BrandBourns
TWD40.40
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 167-4659
製造零件編號PEC11R-4220F-S0024
BrandBourns
TWD42.30
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 729-5703
製造零件編號EC11EBB24C03
TWD629.00
單位
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庫存編號 781-6809
製造零件編號PEC12R-4230F-S0024
BrandBourns
TWD40.00
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 30mm - 100rpm 1mm -
RS庫存編號 729-5592
製造零件編號EC11E18244AU
TWD144.00
單位
18 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 781-6811
製造零件編號PEC12R-4225F-S0024
BrandBourns
TWD38.00
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 25mm - 100rpm 1mm -
RS庫存編號 172-6381
製造零件編號SRGP400100
TWD55.10
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 172-6332
製造零件編號EC12D1564404
TWD46.80
Each (In a Tray of 80)
單位
15 Flat 5.975 mm Incremental Digital Square Wave Through Hole 17.5mm Not Indexed - 1.05 mm, 2.1 mm, 2.15 x 2.05 mm -
RS庫存編號 729-5909
製造零件編號SRGP200200
TWD97.00
單位
10 Hollow - Incremental Digital Square Wave Through Hole - Not Indexed - 1 mm, 1.5 mm, 2.05 mm, 2.1 mm -
RS庫存編號 729-5854
製造零件編號EC12D1524403
TWD53.00
單位
15 Flat 5.975 mm Incremental Digital Square Wave Through Hole 17.5mm Not Indexed - 1.05 mm, 2.1 mm, 2.15 x 2.05 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 172-6318
製造零件編號EC12E1220813
TWD56.60
Each (In a Tray of 95)
單位
12 Flat 6 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed - 1 mm, 2.1 x 2 mm -
RS庫存編號 729-5523
製造零件編號EC05E1220202
TWD91.00
單位
12 Hollow 2 mm Incremental - Bracket Mount, Surface Mount - Not Indexed - 1.5mm -