Heat treated ground gears with high precision and strength, has excellent cost-performance ratio. J Series products are also available.
[NOTE] The catalog numbers in the above table with (F) on the end have both ends machined so that they can be butted against each other to make any desired length. The items with (D) have mounting screw holes for easier assembly.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
Thermal Refined Ground Racks
(KRG/KRGF/KRGD)
Module
1～3
Length
mm
100,500,1000
Material
SCM440
Heat treatment
Thermal refining
Tooth surface finish
Ground
Precision
KHK R 001
NOTE 1
1
Have excellent strength and wear resistance which allow your designs to be more compact.
[NOTE] The catalog numbers in the above table with (F) on the end have both ends machined so that they can be butted against each other to make any desired length. The items with (D) have mounting screw holes for easier assembly.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
Heat Treated Ground Racks
(SRG/SRGF/SRGFD/SRGFK)
Module
0.5～6
Length
mm
100,300,500,1000
Material
S45C
Heat treatment
Teeth induction hardened
NOTE 2
Tooth surface finish
Ground
Precision
KHK R 001
NOTE 1
3
Reasonably priced ground racks with abrasion-resistant characteristics.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
[NOTE1] The catalog numbers in the above table with (F) on the end have both ends machined so that they can be butted against each other to make any desired length. The items with (K)(D) have mounting screw holes for easier assembly.
[NOTE2] Tooth areas, where size is less than 0.8 module, without quenching treatment.
Heat Treated Racks
(SRF-H/SRFD-H)
Module
1.5～4
Length
mm
1000
Material
S45C
Heat treatment
Tooth surfaces induction hardened
Tooth surface finish
Hobbed
Precision
KHK R 001
NOTE 1
5
Reasonably priced heat treated racks with high strength and long life-span, stable for use over a prolonged period. J Series products are also available.
[NOTE] The catalog numbers in the above table with (F) on the end have both ends machined so that they can be butted against each other to make any desired length. The items with (D) have mounting screw holes for easier assembly.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
Thermal Refined Racks
(KRF)
Module
1.5～5
Length
mm
1000
Material
SCM440
Heat treatment
Thermal refining
Tooth surface finish
Hobbed
Precision
KHK R 001
NOTE 1
4
Increased strength with SCM440 material which is thermal refined.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
Racks with Machined Ends
(SRAF)
Module
1.5～4
Length
mm
1000
Material
S45C
Heat treatment
Straightened & annealed
Tooth surface finish
Hobbed
Precision
KHK R 001
NOTE 1
4
Compared to regular SRF racks, low cost and compact products where tooth width and tooth height are the same size.
[NOTE] The catalog numbers in the above table with (F) on the end have both ends machined so that they can be butted against each other to make any desired length.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
Racks
(SR)
Module
0.5～10
Length
mm
100,110,130,160,300,500
Material
S45C
Heat treatment
Straightened & annealed
Tooth surface finish
Hobbed
Precision
KHK R 001
NOTE 1
4
Low cost with large selections of modules and numbers of teeth.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
Racks with Machined Ends
(SRF)
Module
0.5～10
Length
mm
300,500,1000,1500,2000
Material
S45C
Heat treatment
Straightened & annealed
Tooth surface finish
Hobbed
Precision
KHK R 001
NOTE 1
4
Low cost with large selections of modules and numbers of teeth.
[NOTE] The catalog numbers in the above table with (F) on the end have both ends machined so that they can be butted against each other to make any desired length.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
Racks with Bolts Holes
(SRFD·SRFK)
Module
0.5～6
Length
mm
300,500,1000,1500,2000
Material
S45C
Heat treatment
Straightened & annealed
Tooth surface finish
Hobbed
Precision
KHK R 001
NOTE 1
4
Low cost with large selections of modules and numbers of teeth.J series products are also available.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
[NOTE1] The catalog numbers in the above table with (F) on the end have both ends machined so that they can be butted against each other to make any desired length. The items with (K)(D) have mounting screw holes for easier assembly.
Stainless Steel Racks
(SUR·SURF·SURFD)
Module
1～4
Length
mm
500,1000
Material
SUS304
Heat treatment
Solution treatment
Tooth surface finish
Hobbed
Precision
KHK R 001
NOTE 1
5
Suitable for food machinery due to SUS304 material’s rust-resistant quality.
[NOTE] The catalog numbers in the above table with (F) on the end have both ends machined so that they can be butted against each other to make any desired length. The items with (D) have mounting screw holes for easier assembly.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
Plastic Racks
(PR·PRF)
Module
1～3
Length
mm
500,1000
Material
MC901
Heat treatment
－
Tooth surface finish
Hobbed
Precision
KHK R 001
NOTE 1
5
MC nylon is lightweight and can be used without lubricant.
[NOTE] The catalog numbers in the above table with (F) on the end have both ends machined so that they can be butted against each other to make any desired length.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
Brass Racks
(BSR)
Module
0.5～1
Length
mm
300
Material
C3604
Heat treatment
－
Tooth surface finish
Hobbed
Precision
KHK R 001
NOTE 1
4
Small pitch racks of module 0.5~1. Mating pinions are BSS or DS series.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
Round Racks
(SRO·SROS)
Module
1～6
Length
mm
500,1000
Material
S45C
Heat treatment
Straightened & annealed
Tooth surface finish
Hobbed
Precision
KHK R 001
NOTE 1
4
Secondary Operations
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
Round Racks
(SURO)
Module
1～3
Length
mm
500,1000
Material
SUS303
Heat treatment
－
Tooth surface finish
Hobbed
Precision
KHK R 001
NOTE 1
5
Same dimensions as SRO racks, except in stainless steel. Use where rust-resistance is required.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
Molded Flexible Racks
(DR)
Module
0.8～2
Length
mm
2000
Material
M25-44
Heat treatment
－
Tooth surface finish
Injection molded
Precision
KHK R 001
NOTE 1
8
Can be used in applications due to flexibility of injection molded racks which metal racks are lacking in.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
Ground Helical Racks
(KRHG·KRHGF)
Module
1～3
Length
mm
100,500,1000
Material
SCM440
Heat treatment
Thermal refining
Tooth surface finish
Ground
Precision
KHK R 001
NOTE 1
1
The hypoid-gear engagement position is dependent on the twist direction of the pinion thread.
[NOTE] The catalog numbers in the above table with (F) on the end have both ends machined so that they can be butted against each other to make any desired length.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
Helical Racks
(SRH·SRHF·SRHFD)
Module
2～3
Length
mm
100,500,1000
Material
S45C
Heat treatment
Straightened & annealed
Tooth surface finish
Hobbed
Precision
KHK R 001
NOTE 1
5
Effective in reducing noise and vibration due to larger contact ratio of helical gears.
[NOTE] The catalog numbers in the above table with (F) on the end have both ends machined so that they can be butted against each other to make any desired length. The items with (D) have mounting screw holes for easier assembly.
[NOTE1] Precision grade standard of racks are set by KHK. Please see “Precision of Racks” in Selection Hints section for details.
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