[Plastic Racks (PR·PRF)] Series list   
diagram
Specifications
Precision grade KHK R 001 grade 5 Surface hardness (HRR115 - 120)
Gear teeth Standard full depth Surrafe treatment -
Pressure angle 20° Surface finish Cut
Material MC901 Datum reference surface for teeth cutting Bottom surface
Heat treatment - Modifications Possible
*Precision grade of this product corresponds to 'equivalent'.
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Catalog No.
Module
Effective No. of teeth Shape Total length
A
Face width
B
Height
C
Height to pitch line
D
Allowable force(kgf)
Bending strength
Weight
(kg)
Unit Price
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  PR1-500 
  PR1.5-500 
  PR1.5-1000 
  PR2-500 
  PR2-1000 
  PR2.5-500 
  PR2.5-1000 
  PR3-500 
  PR3-1000 
  PRF1.5-1000 
  PRF2-1000 
  PRF2.5-1000 
  PRF3-1000 
1159R15051012119.460.064 
1.5105R1505152018.521.30.16 
1.5212R11010152018.521.30.33 
279R150520252337.90.27 
2159R1101020252337.90.54 
2.563R1505253027.559.20.40 
2.5127R11010253027.559.20.81 
352R150530353285.20.56 
3105R1101030353285.21.12 
1.5212RF999.03152018.521.30.32 
2160RF1005.3120252337.90.54 
2.5128RF1005.31253027.559.20.80 
3106RF999.0330353285.21.11 
Product Precautions
[Caution on Product Characteristics]  ①The allowable forces shown in the table are the calculated values according to the assumed usage conditions. Please see Selection Hints for more details
 ②The backlash value of a rack is calculated from the addition of 1/2 the backlash of the mating pinion and the value shown in the table “Backlash of Amount of Tooth Thinning”.
 ③Dimensions of Plastic Racks vary due to temperature and humidity. A 10°C rise in the ambient temperature will cause 0.45 mm increase in the length per 1000 mm. A 2% moisture absorption will cause approx. 5 mm increase in the length per 1000 mm. Please see the section “Design of Plastic Gears” in the technical reference.
 ④Although minor deviation with a few millimeters may be expected due to aging, it is capable to use with the same accuracy obtained when gear-cutting, as long as it is installed so that the datum reference surface for teeth cutting (bottom surface) is in close contact with the mounting surface.

[Caution on Secondary Operations]  ①Please read “Cautions on Performing Secondary Operations”when performing modification and/or secondary operations of Racks. Haguruma Kobo, the KHK's system for quick modification of KHK stock gears is also available.
 ②Plastic gears are susceptible to the effects of temperature and moisture. Dimensional changes may occur while performing secondary operations and during post-machining operations. It is recommended to modify mounting holes and the attaching portions at the same time when stringing together racks for use.
  Please click here to Unit Price & Delivery Time.