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 623-4079
製造零件編號EC11B15244A7
HK$50.34
單位
15 Flat - - - Through Hole 20mm Not Indexed - - -
RS庫存編號 729-5564
製造零件編號EC11B15242AF
HK$55.51
單位
15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 1.8 mm -
RS庫存編號 172-8134
製造零件編號EC11B15242AF
HK$40.35
Each (In a Tray of 70)
單位
15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 1.8 mm -
RS庫存編號 623-4237
製造零件編號EC12E2424407
HK$13.39
單位
24 Flat - - - Through Hole 14mm Not Indexed - - -
RS庫存編號 172-8098
製造零件編號EC12E2424407
HK$16.303
Each (In a Tray of 120)
單位
24 Flat - - - Through Hole 14mm Not Indexed - - -
全新
RS庫存編號 189-4750
製造零件編號AEAT-6012-A06
BrandBroadcom
HK$196.237
毎管:280 個
單位
1024 (Positions) - 6 mm Absolute - Screw Mount 8.5mm - 12000rpm 17mm 20mA
RS庫存編號 714-2693
製造零件編號AEAT-6012-A06
BrandBroadcom
HK$239.08
單位
- Plain 6 mm Absolute - - 8.5mm - 12000rpm 0.13mm -
RS庫存編號 172-7669
製造零件編號EC11E15244G1
HK$27.675
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 729-5561
製造零件編號EC11E15204A3
HK$22.33
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 172-7664
製造零件編號EC11E15204A3
HK$25.157
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 729-5589
製造零件編號EC11E15244G1
HK$26.42
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 623-4136
製造零件編號EC11B202440M
HK$49.70
單位
20 Flat - - - Through Hole 20mm Not Indexed - - -
RS庫存編號 172-6398
製造零件編號EC11B15242AE
HK$49.314
Each (In a Tray of 70)
單位
15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 1.8 mm -
RS庫存編號 729-5555
製造零件編號EC11B15242AE
HK$61.32
單位
15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 1.8 mm -
RS庫存編號 623-4293
製造零件編號EC11E15244C0
HK$71.00
單位
15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm - - 1 mm, 2.6 x 1.5 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 172-8047
製造零件編號EC12E2420404
HK$10.68
Each (In a Tray of 120)
單位
24 Flat - - - Through Hole 15mm Not Indexed - - -
RS庫存編號 172-6354
製造零件編號EC05E1220203
HK$13.45
個 (在毎卷:1000)
單位
12 Hollow 2 mm Incremental - Bracket Mount, Surface Mount - Not Indexed - 1.5mm -
RS庫存編號 729-5703
製造零件編號EC11EBB24C03
HK$155.48
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 729-5895
製造零件編號SRGAV80601
HK$36.11
單位
8 (Positions) Hollow 5 mm Absolute Gray Code Through Hole - Not Indexed - 0.9 mm, 1.5 mm, 1.55 mm -