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Plastic helical gear (PN3-20R)

Plastic helical gear PN3-20R

Employing lightweight MC901 material, this screw gear can even be used without lubrication. Prone to wear and galling, so different combinations of materials are recommended.

PDF

Japanese Only

Drawing

Dimensional drawing of screw gear

Product Specifications

External appearance of screw gear

External appearance

Common Specifications
Accuracy ClassJIS B 1702-1 Class N9 (*1)MaterialsMC901
Gear reference cross sectionNormalSurface TreatmentNone
ProfileStandard GearTooth flank finishMilled
Normal pressure angle20°Gear cutting reference cross sectionHole
Helix angle45°AlterationPossible

Former JIS B 1702 Class 5 this product is a notation accuracy grade "equivalent product."

Standard table

Catalog
Symbol
ModuleNo. of teethHelix
direction
ShapeHole diameter
A
Boss Diameter
B
Reference circle
Diameter
C
Tooth tip circle
Diameter
D
Tooth width
E
Hub
Length
F
Overall Length
G
Tolerance
Tooth flank strength
(kgf ⋅ m)
Backlash
Lower limit (mm)
Backlash
Upper limit (mm)
Weight
(kg)
PN1.5-10R1.510RS161621.2124.211510250.02900.380.0077
PN1.5-10L1.510LS161621.2124.211510250.02900.380.0077
PN1.5-13R1.513RS182327.5830.581510250.06300.380.014
PN1.5-13L1.513LS182327.5830.581510250.06300.380.014
PN1.5-15R1.515RS182531.8234.821510250.09600.380.018
PN1.5-15L1.515LS182531.8234.821510250.09500.380.018
PN1.5-20R1.520RS1103042.4345.431510250.2200.380.031
PN1.5-20L1.520LS1103042.4345.431510250.2200.380.031
PN2-10R210RS1102228.2832.282015350.06800.420.018
PN2-10L210LS1102228.2832.282015350.06800.420.018
PN2-13R213RS1103036.7740.772015350.1400.420.034
PN2-13L213LS1103036.7740.772015350.1400.420.034
PN2-15R215RS1103542.4346.432015350.2200.420.046
PN2-15L215LS1103542.4346.432015350.2200.420.046
PN2-20R220RS1124556.5760.572015350.4900.440.081
PN2-20L220LS1124556.5760.572015250.4900.440.081
PN2.5-10R2.510RS1102635.3640.362216380.1300.440.031
PN2.5-10L2.510LS1102635.3640.362216380.1300.440.031
PN2.5-13R2.513RS1123545.9650.962216380.2700.440.055
PN2.5-13L2.513LS1123545.9650.962216380.2700.440.055
PN2.5-15R2.515RS1124053.0358.032216380.4100.460.075
PN2.5-15L2.515LS1124053.0358.032216380.4100.460.075
PN2.5-20R2.520RS1126070.7175.712216380.9200.460.15
PN2.5-20L2.520LS1126070.7175.712216380.9200.460.15
PN3-10R310RS1123442.4348.432518430.2200.520.054
PN3-10L310LS1123442.4348.432518430.2200.520.054
PN3-13R313RS1154555.1561.152518430.4600.540.094
PN3-13L313LS1154555.1561.152518430.4600.540.094
PN3-15R315RS1155063.6469.642518430.6900.540.12
PN3-15L315LS1155063.6469.642518430.6900.540.12
PN3-20R320RS1156084.8590.852518431.5300.540.21
PN3-20L320LS1156084.8590.852518431.5300.540.21
  • * Linking with outer diameter diagram

Usage examples

Operating method and usage examples

For General Industry

Cautions/prohibitions

Cautions/prohibitions

  1. 1. The material of plastic gears expands and contracts depending on the temperature and humidity, and the dimensions such as hole diameter (H8 when manufactured), tip diameter, backlash change. Please check "design of plastic gears" in the gear technical data for your study.
  2. 2. Using the same material for screw gears may cause wear and galling, so the combination with other materials is recommendable.
  3. 3. The allowable torque shown above is a reference value calculated under arbitrary usage conditions. Please check the precautions for details.
  4. 4. The backlash shown above is the normal backlash when assembled with the same part number at theoretical value.
  5. 5. When using for skewed shafts (screw gears), it becomes a combination of helices in the identical direction (right and right or left and left), and when using for parallel shafts (helical gears), it becomes a combination of different helices (right and left).

Precautions for alteration

  1. 1. For alteration to screw gears, it is necessary to check "precautions for alteration" in the precautions for safety before alteration.
  2. 2. Please refrain from processing to narrow the tooth width because it will affect the accuracy and strength of the gear.
  3. 3. Plastic gears are products that are easily affected by temperature and humidity. Please note that there may be changes in dimensions during and after processing.
Part Number
PN3-20R
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipRoHSModule Number of Teeth
(Teeth)
Twisting Direction Shaft Bore Dia., Shaft Dia. Tooth Width
(mm)
Boss diameter B
(φ)
Hole diameter A
(φ)
Accuracy Grade Shaft Hole Specifications

SGD 86.22

1 Piece(s) 10 Day(s) 10320Right15256015N9 GradePilot Hole Product

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  1. 1

Basic Information

Material(mm) Resin Heat Treatment(φ) No Ground Tooth Presence
Surface Treatment No Shaft Bore Config. Round hole Gear Shape Shape B
Hole Dia. Tolerance Not Specified Metal system material MC901 Torsional Angle(°) 45
Keyway(mm) NA

Please check the type/dimensions/specifications of the part PN3-20R in the Plastic helical gear series.

Similar Part Numbers

Part Number
PN1-13L
PN1-13R
PN1-15L
PN1-15R
PN1-20L
PN1-20R
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipRoHSModule Number of Teeth
(Teeth)
Twisting Direction Shaft Bore Dia., Shaft Dia. Tooth Width
(mm)
Boss diameter B
(φ)
Hole diameter A
(φ)
Accuracy Grade Shaft Hole Specifications

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1 Piece(s) 10 Day(s) -120Right810258Class N9Pilot hole product

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