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K27 (Ball Bearing)

K27 Spur Gearbox with Ball Bearings

K27 Ball Bearing Mini Motor Gearhead

K27 (Ball Bearing)

The combination of our K27 spur gearheads with our brush DC coreless motors provides a single, factory-integrated solution for demanding, high-efficiency applications. Due to its spur compound geartrain arrangement, it provides the output in the same axis as of the motor. The K27 gearhead's inherent design results in overall better efficiency and lower noise which are the requirements for wide ranging applications like medical pumps, security and access and luxury goods.

Product Highlights

  • For additional ratios, please download the specification pdf from the resources tab below
  • High-precision performance at a competitive price point
  • Reduction ratio of 6.2:1 to 2970:1
  • Better power to weight ratio
  • Sleeve and ball bearings options available
  • Compact design
  • Rated torque 0.4 Nm
  • Customization as per application needs

Customization Available

  • Custom shafts - flats, knurling, diameter, length
  • Mechanical integration upon request (housing, front & rear flange, shaft)
  • Special lubricants
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Part Number K27-2R-0-6.2 K27-2R-0-18.6 K27-2R-0-27.9 K27-2R-0-55.7 K27-2R-0-99.1 K27-2R-0-198 K27-2R-0-501 K27-2R-0-979 K27-2R-0-2970
Motor Diameter (in) 1.0611 1.0611 1.0611 1.0611 1.0611 1.0611 1.0611 1.0611 1.0611
Motor Diameter (mm) 27 27 27 27 27 27 27 27 27
Shaft Play - Axial (μm) ≤ 100 ≤ 100 ≤ 100 ≤ 100 ≤ 100 ≤ 100 ≤ 100 ≤ 100 ≤ 100
Shaft Play - Radial (μm) ≤ 20 ≤ 20 ≤ 20 ≤ 20 ≤ 20 ≤ 20 ≤ 20 ≤ 20 ≤ 20
Ambient Operating Temperature Range (°C) -30 to +65 -30 to +65 -30 to +65 -30 to +65 -30 to +65 -30 to +65 -30 to +65 -30 to +65 -30 to +65
Ambient Operating Temperature Range (°F) -22 to +150 -22 to +150 -22 to +150 -22 to +150 -22 to +150 -22 to +150 -22 to +150 -22 to +150 -22 to +150
Continuous Torque, Max (mNm) 400 400 400 400 400 400 400 400 400
Weight (g) 40 40 40 40 42 42 42 42 18
Weight (oz) 1.41 1.41 1.41 1.41 1.48 1.48 1.48 1.48 1.69
Ratio 6.2 18.6 27.9 55.7 99.1 198 501 979 2970
Efficiency (%) 65 65 65 65 55 55 55 55 40
Average Backlash @ 0.3 Nm (degree) 3 3 3 3 3 3 3 3 3
Average Backlash @ no-load (degree) 2 2 2 2 2 2 2 2 2
Axial Force, Max (lbs) 9 9 9 9 9 9 9 9 9
Axial Force, Max (N) 40 40 40 40 40 40 40 40 40
Length (in) 1.11 1.11 1.11 1.11 1.11 1.11 1.11 1.11 1.11
Length (mm) 28.5 28.5 28.5 28.5 28.5 28.5 28.5 28.5 28.5
Number of Gear Stages 4 4 4 4 6 6 6 6 9
Press Fit Force, Max (lbs) 13.5 13.5 13.5 13.5 13.5 13.5 13.5 13.5 13.5
Press Fit Force, Max (N) 60 60 60 60 60 60 60 60 60
Radial Force, Max @ 8mm from mounting face (lbs) 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5
Radial Force, Max @ 8mm from mounting face (N) 25 25 25 25 25 25 25 25 25
Recommended Input Speed, Max (rpm) 4000 4000 4000 4000 4000 4000 4000 4000 4000
Static Torque, Max (Nm) 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7
Static Torque, Max (oz-in) 100 100 100 100 100 100 100 100 100
Direction of Rotation = = = = = = = = ≠
Document Document Type Language File Type
Portescap MotionCompass: Guide to Interactive Motor Selection (brochure) Brochure
K27 drawing 2D Drawing
K27 3D drawing 3D Drawing
K27 Specification Page Specification Page