[Ground Helical Racks (KRHG・KRHGF・KRHGFD)] Series list   
diagram
Specifications
Precision grade KHK R 001 grade 1 Heat treatment Normalizing only
Reference section of gear Rotating plane Tooth Surface hardness HB225 - 285
Gear teeth Standard full depth Surface treatment -
Normal pressure angle 20° Surface finish Ground
Helix angle 21°30′ Datum reference surface for teeth grinding Bottom surface
Material SCM440 Modifications Possible
*Precision grade of J Series products corresponds to an 'equivalent'.
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Catalog No.
Module
Effective No. of teeth Hand of thread Shape Total length
A
Total length
A'
Face width
B
Height
C
Height to pitch line
D
Mounting hole dimensions
E
Mounting hole dimensions
F
Mounting hole dimensions
G
No. of mounting holes Mounting screw size Counterbore dimensions
H
Counterbore dimensions
I
Counterbore dimensions
J
Allowable force(kgf)
Bending strength
Allowable force(kgf)
Surface durability
Weight
(kg)
Unit Price
Click Here
Prices of J Series Products
1-4
Prices of J Series Products
5-20
  KRHG1-100R 
  KRHG1-100L 
  KRHG1.5-100R 
  KRHG1.5-100L 
  KRHG2-100R 
  KRHG2-100L 
  KRHG2.5-100R 
  KRHG2.5-100L 
  KRHG3-100R 
  KRHG3-100L 
  KRHGF1-500R 
  KRHGF1-500L 
  KRHGF1.5-500R 
  KRHGF1.5-500L 
  KRHGF2-1000R 
  KRHGF2-1000L 
  KRHGF2.5-1000R 
  KRHGF2.5-1000L 
  KRHGF3-1000R 
  KRHGF3-1000L 
 KRHGFD1-500RJ 
 KRHGFD1-500LJ 
 KRHGFD1.5-500RJ 
 KRHGFD1.5-500LJ 
 KRHGFD2-1000RJ 
 KRHGFD2-1000LJ 
 KRHGFD2.5-1000RJ 
 KRHGFD2.5-1000LJ 
 KRHGFD3-1000RJ 
 KRHGFD3-1000LJ 
128RRR98 81514        13197.40.086   
128LRL98 81514        13197.40.086   
1.519RRR101 122018.5        2952430.18   
1.519LRL101 122018.5        2952430.18   
213RRR98 162523        5244320.28   
213LRL98 162523        5244320.28   
2.510RRR100 203027.5        8196740.43   
2.510LRL100 203027.5        8196740.43   
38RRR102 253532        123010000.64   
38LRL102 253532        123010000.64   
1159RRFR499.51502.6681514        13197.40.44   
1159LRFL499.51502.6681514        13197.40.44   
1.5106RRFR499.51504.23122018.5        2952430.87   
1.5106LRFL499.51504.23122018.5        2952430.87   
2160RRFR1005.311011.61162523        5244322.90   
2160LRFL1005.311011.61162523        5244322.90   
2.5128RRFR1005.311013.19203027.5        8196744.34   
2.5128LRFL1005.311013.19203027.5        8196744.34   
3106RRFR999.031008.88253532        123010006.27   
3106LRFL999.031008.88253532        123010006.27   
1159RRDR499.51502.6681514624.761504M44.484.513197.40.43   
1159LRDL499.51502.6681514624.761504M44.484.513197.40.43   
1.5106RRDR499.51504.23122018.5824.761504M561062952430.85   
1.5106LRDL499.51504.23122018.5824.761504M561062952430.85   
2160RRDR1005.311011.611625231052.651806M671175244322.86   
2160LRDL1005.311011.611625231052.651806M671175244322.86   
2.5128RRDR1005.311013.19203027.51252.651806M88.61498196744.24   
2.5128LRDL1005.311013.19203027.51252.651806M88.61498196744.24   
3106RRDR999.031008.882535321449.511806M1010.817.511123010006.09   
3106LRDL999.031008.882535321449.511806M1010.817.511123010006.09   
Product Precautions
[Precaution on J Series Products]  ①Since J series are available-on-request products, it requires a lead-time within 2 working-days (excludes the day ordered),after placing an order【E】. Number of products we can handle for one order is 1 to 20 units. In case of ordering products over 20 units, we shall submit a quote.

[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”.
 ③Please use KHG Ground Helical Gears as the mating pinion.
 ④These gears produce axial thrust forces. See precaution for more details.

[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.
  Please click here to Unit Price & Delivery Time.