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 179-0687
製造零件編號291V1022F832AB
BrandCTS
TWD503.80
Each (In a Tray of 72)
單位
8 Flat 6.35 mm - Digital Through Hole 17.27mm - 30rpm 0.76mm 2mA
RS庫存編號 729-5794
製造零件編號EC12E1240301
TWD76.00
單位
12 Hollow 6 mm Incremental Digital Square Wave Through Hole 8.5mm Not Indexed - 1 mm, 2.1 x 2 mm -
RS庫存編號 172-6381
製造零件編號SRGP400100
TWD55.30
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 623-4237
製造零件編號EC12E2424407
TWD100.00
單位
24 Flat - - - Through Hole 14mm Not Indexed - - -
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 167-5382
製造零件編號PEC11R-4215F-S0012
BrandBourns
TWD42.10
個 (以毎袋:75)
單位
12 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm - 60rpm 1mm -
RS庫存編號 789-9513
製造零件編號PEC11R-4020F-N0012
BrandBourns
TWD57.00
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 729-5801
製造零件編號EC12E24204A8
TWD54.00
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 2 mm -
RS庫存編號 729-5599
製造零件編號EC11E09244AQ
TWD153.00
單位
9 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 265-2906
製造零件編號EC11B1520206
TWD181.00
單位
15 Slot - Incremental Digital Square Wave Through Hole 25mm - - 1 mm, 2.1 x 1.8 mm -
RS庫存編號 172-8042
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 167-5089
製造零件編號PEC12R-2125F-N0012
BrandBourns
TWD24.50
個 (以毎袋:75)
單位
12 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
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 167-4660
製造零件編號PEC12R-4220F-S0024
BrandBourns
TWD31.20
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 789-9611
製造零件編號PEC12R-2225F-N0024
BrandBourns
TWD29.00
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
RS庫存編號 167-4657
製造零件編號PEC11R-4225F-S0024
BrandBourns
TWD37.60
個 (以毎袋:75)
單位
24 Flat 6 mm Incremental Digital Square Wave - 25mm Not Indexed 60rpm 7mm -
RS庫存編號 737-7732
製造零件編號PEC11R-4020F-S0024
BrandBourns
TWD50.00
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 729-5860
製造零件編號EC12D1564404
TWD59.00
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 789-9529
製造零件編號PEC11R-4025F-N0024
BrandBourns
TWD44.00
單位
24 Flat 6 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -