KHK STRCPF / STRCPFD CP Tapered Racks

Considering a tapered rack system with circular pitch? STRCPF and STRCPFD are the dedicated CP tapered rack group.

Customer: Which family should I specify?

KAYO: CP identifies circular pitch. Select a pinion with the matching CP specification; keep the pitch system explicit when requesting a quote.

Customer: Which models and sizes are shown?

KAYO: The current Japanese selection table lists 4 model codes for this group. Pitch values: CP5, CP10. All listed models are shown below.

Model	Pitch	Overall length (mm)	Face width (mm)	Mass (kg)
STRCPF5-1000	CP5	1000	15	2.05
STRCPF10-1000	CP10	1000	30	7.13
STRCPFD5-1000	CP5	1000	15	2.01
STRCPFD10-1000	CP10	1000	30	6.92

Customer: What should I check before installation?

KAYO: Use the specified mating tapered pinion and confirm the adjustment procedure for the system. Check tooth pitch, pressure angle, rack mounting height and pinion alignment. Confirm backlash and lubrication for the actual duty. Where sections meet, verify the joint geometry and pitch continuity.

Customer: What are the exact model numbers?

KAYO: STRCPF5-1000, STRCPF10-1000, STRCPFD5-1000, STRCPFD10-1000.

Customer: What should I send for an enquiry?

KAYO: Please send the complete model code, quantity, required travel, mating pinion, mounting details, speed and load. We can discuss the specification and availability for your application. Confirm final dimensions and suitability against the latest manufacturer information.

References: KHK STRCPF / STRCPFD official selection page | KHK rack product range.

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KHK ZST-GL Assembly Gauges for Helical Racks

Joining compatible helical rack sections? ZST-GL is an assembly gauge family for the installation task.

Customer: Which family should I specify?

KAYO: This is an assembly aid, so select it for the rack installation procedure. It is not a drive rack and the dash marks in its catalog force columns are not load ratings.

Customer: Which models and sizes are shown?

KAYO: The current Japanese selection table lists 6 gauge codes for this group. Module values: 1.5, 2, 3, 4, 5, 6. All listed models are shown below.

Model	Module	Overall length (mm)	Face width (mm)	Mass (kg)
ZST1.5-GL	1.5	59	17	0.11
ZST2-GL	2	66	25	0.26
ZST3-GL	3	108	30	0.62
ZST4-GL	4	118	40	1.17
ZST5-GL	5	115	50	1.72
ZST6-GL	6	119	60	2.49

Customer: What should I check before installation?

KAYO: Select a gauge that matches the rack tooth specification and follow the manufacturer assembly procedure. Check the gauge module, rack helix geometry and joint arrangement. The purpose is to assist assembly; it does not replace the installation and inspection procedure.

Customer: What are the exact model numbers?

KAYO: ZST1.5-GL, ZST2-GL, ZST3-GL, ZST4-GL, ZST5-GL, ZST6-GL.

Customer: What should I send for an enquiry?

KAYO: Please send the complete model code, quantity, rack model and assembly requirements. We can discuss the specification and availability for your application. Confirm final dimensions and suitability against the latest manufacturer information.

References: KHK ZST-GL official selection page | KHK rack product range.

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KHK ZST / ZSTD Hardened Ground Helical Racks

Need a hardened, ground helical rack? ZST and ZSTD are shown together on the KHK range page.

Customer: Which family should I specify?

KAYO: Use the complete model designation to identify the module and rack format. Confirm the mating pinion and mounting geometry from the manufacturer drawings.

Customer: Which models and sizes are shown?

KAYO: The current Japanese selection table lists 16 model codes for this group. Module values: 2, 3, 4, 5, 6. Representative dimensions are shown below, followed by the complete model list.

Model	Module	Overall length (mm)	Face width (mm)	Mass (kg)
ZST2-1000R	2	1000	24	4.13
ZST4-1000R	4	1000	39	10.7
ZSTD2-1000RJ	2	1000	24	4.05
ZSTD4-1000RJ	4	1000	39	10.4
ZSTD6-1000RJ	6	1000	59	18.6

Customer: What should I check before installation?

KAYO: Use the matching pinion geometry and verify the joint and mounting arrangement for the selected rack. For a helical rack, check pitch, helix angle and opposite helix hand of the pinion. Provide bearing support for axial thrust and verify alignment along the full travel.

Customer: What are the exact model numbers?

KAYO: ZST2-1000R, ZST2-2000R, ZST3-1000R, ZST3-2000R, ZST4-1000R, ZST4-2000R, ZST5-1000R, ZST6-1000R, ZSTD2-1000RJ, ZSTD2-2000RJ, ZSTD3-1000RJ, ZSTD3-2000RJ, ZSTD4-1000RJ, ZSTD4-2000RJ, ZSTD5-1000RJ, ZSTD6-1000RJ.

Customer: What should I send for an enquiry?

KAYO: Please send the complete model code, quantity, required travel, mating pinion, mounting details, speed and load. We can discuss the specification and availability for your application. Confirm final dimensions and suitability against the latest manufacturer information.

References: KHK ZST / ZSTD official selection page | KHK rack product range.

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KHK SRHEF-HL Laser Hardened Helical Racks

Need the laser hardened SRHEF version? The HL designation identifies this separate group.

Customer: Which family should I specify?

KAYO: Use the complete model designation to identify the module and rack format. Confirm the mating pinion and mounting geometry from the manufacturer drawings.

Customer: Which models and sizes are shown?

KAYO: The current Japanese selection table lists 4 model codes for this group. Module values: 3, 4, 5, 6. All listed models are shown below.

Model	Module	Overall length (mm)	Face width (mm)	Mass (kg)
SRHEF3-1000RHL	3	1000	29	5.91
SRHEF4-1000RHL	4	1000	39	10.7
SRHEF5-1000RHL	5	1000	49	13.1
SRHEF6-1000RHL	6	1000	59	19.9

Customer: What should I check before installation?

KAYO: Preserve the HL suffix and confirm pinion compatibility and the selected model load rating. For a helical rack, check pitch, helix angle and opposite helix hand of the pinion. Provide bearing support for axial thrust and verify alignment along the full travel.

Customer: What are the exact model numbers?

KAYO: SRHEF3-1000RHL, SRHEF4-1000RHL, SRHEF5-1000RHL, SRHEF6-1000RHL.

Customer: What should I send for an enquiry?

KAYO: Please send the complete model code, quantity, required travel, mating pinion, mounting details, speed and load. We can discuss the specification and availability for your application. Confirm final dimensions and suitability against the latest manufacturer information.

References: KHK SRHEF-HL official selection page | KHK rack product range.

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KHK SRHEF Helical Racks

Considering SRHEF for a helical rack drive? The catalog groups the available sizes in a dedicated table.

Customer: Which family should I specify?

KAYO: Use the complete model designation to identify the module and rack format. Confirm the mating pinion and mounting geometry from the manufacturer drawings.

Customer: Which models and sizes are shown?

KAYO: The current Japanese selection table lists 6 model codes for this group. Module values: 1.5, 2, 3, 4, 5, 6. All listed models are shown below.

Model	Module	Overall length (mm)	Face width (mm)	Mass (kg)
SRHEF1.5-1000R	1.5	1000	17	2.06
SRHEF2-1000R	2	1000	24	4.14
SRHEF3-1000R	3	1000	29	5.91
SRHEF4-1000R	4	1000	39	10.7
SRHEF5-1000R	5	1000	49	13.1
SRHEF6-1000R	6	1000	59	19.9

Customer: What should I check before installation?

KAYO: Check the mating pinion specification and installation pitch over the required travel. For a helical rack, check pitch, helix angle and opposite helix hand of the pinion. Provide bearing support for axial thrust and verify alignment along the full travel.

Customer: What are the exact model numbers?

KAYO: SRHEF1.5-1000R, SRHEF2-1000R, SRHEF3-1000R, SRHEF4-1000R, SRHEF5-1000R, SRHEF6-1000R.

Customer: What should I send for an enquiry?

KAYO: Please send the complete model code, quantity, required travel, mating pinion, mounting details, speed and load. We can discuss the specification and availability for your application. Confirm final dimensions and suitability against the latest manufacturer information.

References: KHK SRHEF official selection page | KHK rack product range.

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KHK SRH / SRHF / SRHFD Helical Racks

Looking for a helical rack from the SRH family? The official group includes SRH, SRHF and SRHFD.

Customer: Which family should I specify?

KAYO: Use the complete model designation to identify the module and rack format. Confirm the mating pinion and mounting geometry from the manufacturer drawings.

Customer: Which models and sizes are shown?

KAYO: The current Japanese selection table lists 12 model codes for this group. Module values: 2, 3. Representative dimensions are shown below, followed by the complete model list.

Model	Module	Overall length (mm)	Face width (mm)	Mass (kg)
SRH2-100R	2	95	25	0.43
SRH3-100L	3	95	35	0.84
SRHF3-1000R	3	995.24	35	8.75
SRHFD2-1000L	2	995.24	25	4.43
SRHFD3-1000L	3	995.24	35	8.52

Customer: What should I check before installation?

KAYO: Match the helical tooth system and check axial thrust support for the pinion. For a helical rack, check pitch, helix angle and opposite helix hand of the pinion. Provide bearing support for axial thrust and verify alignment along the full travel.

Customer: What are the exact model numbers?

KAYO: SRH2-100R, SRH2-100L, SRH3-100R, SRH3-100L, SRHF2-1000R, SRHF2-1000L, SRHF3-1000R, SRHF3-1000L, SRHFD2-1000R, SRHFD2-1000L, SRHFD3-1000R, SRHFD3-1000L.

Customer: What should I send for an enquiry?

KAYO: Please send the complete model code, quantity, required travel, mating pinion, mounting details, speed and load. We can discuss the specification and availability for your application. Confirm final dimensions and suitability against the latest manufacturer information.

References: KHK SRH / SRHF / SRHFD official selection page | KHK rack product range.

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KHK KRHG / KRHGF / KRHGFD Ground Helical Racks

Need a helical rack with a ground tooth finish? The KRHG group includes several end and mounting formats.

Customer: Which family should I specify?

KAYO: Use the complete model designation to identify the module and rack format. Confirm the mating pinion and mounting geometry from the manufacturer drawings.

Customer: Which models and sizes are shown?

KAYO: The current Japanese selection table lists 30 model codes for this group. Module values: 1, 1.5, 2, 2.5, 3. Representative dimensions are shown below, followed by the complete model list.

Model	Module	Overall length (mm)	Face width (mm)	Mass (kg)
KRHG1-100R	1	98	8	0.086
KRHG2.5-100L	2.5	100	20	0.43
KRHGF2-1000L	2	1005.31	16	2.90
KRHGFD1.5-500RJ	1.5	499.51	12	0.85
KRHGFD3-1000LJ	3	999.03	25	6.09

Customer: What should I check before installation?

KAYO: Confirm helix angle and hand with the selected pinion, then check mounting alignment. For a helical rack, check pitch, helix angle and opposite helix hand of the pinion. Provide bearing support for axial thrust and verify alignment along the full travel.

Customer: What are the exact model numbers?

KAYO: 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.

Customer: What should I send for an enquiry?

KAYO: Please send the complete model code, quantity, required travel, mating pinion, mounting details, speed and load. We can discuss the specification and availability for your application. Confirm final dimensions and suitability against the latest manufacturer information.

References: KHK KRHG / KRHGF / KRHGFD official selection page | KHK rack product range.

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KHK DR Molded Flexible Racks

Considering a molded flexible rack? DR serves a different installation need from rigid rack sections.

Customer: Which family should I specify?

KAYO: Use the complete model designation to identify the module and rack format. Confirm the mating pinion and mounting geometry from the manufacturer drawings.

Customer: Which models and sizes are shown?

KAYO: The current Japanese selection table lists 4 model codes for this group. Module values: 0.8, 1, 1.5, 2. All listed models are shown below.

Model	Module	Overall length (mm)	Face width (mm)	Mass (kg)
DR0.8-2000	0.8	2000	3.8	0.036
DR1-2000	1	2000	5	0.060
DR1.5-2000	1.5	2000	6.5	0.085
DR2-2000	2	2000	8	0.12

Customer: What should I check before installation?

KAYO: Verify allowable curvature, support and the specified mating pinion before designing the path. Use the manufacturer-specified mating pinion and check the required curvature and support. A flexible rack needs an installation review suited to its actual path.

Customer: What are the exact model numbers?

KAYO: DR0.8-2000, DR1-2000, DR1.5-2000, DR2-2000.

Customer: What should I send for an enquiry?

KAYO: Please send the complete model code, quantity, required travel, mating pinion, mounting details, speed and load. We can discuss the specification and availability for your application. Confirm final dimensions and suitability against the latest manufacturer information.

References: KHK DR official selection page | KHK rack product range.

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KHK SURO Stainless Steel Round Racks

Need a round rack in stainless steel? SURO combines that body format with the stainless rack category.

Customer: Which family should I specify?

KAYO: Use the complete model designation to identify the module and rack format. Confirm the mating pinion and mounting geometry from the manufacturer drawings.

Customer: Which models and sizes are shown?

KAYO: The current Japanese selection table lists 8 model codes for this group. Module values: 1, 1.5, 2, 2.5, 3. Representative dimensions are shown below, followed by the complete model list.

Model	Module	Overall length (mm)	Face width (mm)	Mass (kg)
SURO1-500	1	505	10	0.29
SURO2-500	2	505	20	1.17
SURO2.5-500	2.5	505	25	1.82
SURO3-500	3	505	30	2.63
SURO3-1000	3	1010	30	5.25

Customer: What should I check before installation?

KAYO: Check guide fit and environmental compatibility as part of the complete mechanism. Check tooth pitch, pressure angle, rack mounting height and pinion alignment. Confirm backlash and lubrication for the actual duty. Where sections meet, verify the joint geometry and pitch continuity.

Customer: What are the exact model numbers?

KAYO: SURO1-500, SURO1.5-500, SURO2-500, SURO2-1000, SURO2.5-500, SURO2.5-1000, SURO3-500, SURO3-1000.

Customer: What should I send for an enquiry?

KAYO: Please send the complete model code, quantity, required travel, mating pinion, mounting details, speed and load. We can discuss the specification and availability for your application. Confirm final dimensions and suitability against the latest manufacturer information.

References: KHK SURO official selection page | KHK rack product range.

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KHK SRO / SROS Round Racks

Selecting a rack with a round body? SRO and SROS provide circular-section rack options.

Customer: Which family should I specify?

KAYO: Use the complete model designation to identify the module and rack format. Confirm the mating pinion and mounting geometry from the manufacturer drawings.

Customer: Which models and sizes are shown?

KAYO: The current Japanese selection table lists 16 model codes for this group. Module values: 1, 1.5, 2, 2.5, 3, 4, 5. Representative dimensions are shown below, followed by the complete model list.

Model	Module	Overall length (mm)	Face width (mm)	Mass (kg)
SRO1-500	1	505	10	0.29
SRO2.5-500	2.5	505	25	1.81
SRO4-500	4	505	40	4.62
SROS1.5-500	1.5	505	15	0.66
SROS3-500	3	505	30	2.64

Customer: What should I check before installation?

KAYO: Check guidance, anti-rotation support and the mounting details of the moving member. Check tooth pitch, pressure angle, rack mounting height and pinion alignment. Confirm backlash and lubrication for the actual duty. Where sections meet, verify the joint geometry and pitch continuity.

Customer: What are the exact model numbers?

KAYO: SRO1-500, SRO1.5-500, SRO2-500, SRO2-1000, SRO2.5-500, SRO2.5-1000, SRO3-500, SRO3-1000, SRO4-500, SRO4-1000, SRO5-1000, SROS1-500, SROS1.5-500, SROS2-500, SROS2.5-500, SROS3-500.

Customer: What should I send for an enquiry?

KAYO: Please send the complete model code, quantity, required travel, mating pinion, mounting details, speed and load. We can discuss the specification and availability for your application. Confirm final dimensions and suitability against the latest manufacturer information.

References: KHK SRO / SROS official selection page | KHK rack product range.

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KHK BSR Racks

Need a small-module rack? The BSR selection lists a focused set of compact models.

Customer: Which family should I specify?

KAYO: Use the complete model designation to identify the module and rack format. Confirm the mating pinion and mounting geometry from the manufacturer drawings.

Customer: Which models and sizes are shown?

KAYO: The current Japanese selection table lists 3 model codes for this group. Module values: 0.5, 0.8, 1. All listed models are shown below.

Model	Module	Overall length (mm)	Face width (mm)	Mass (kg)
BSR0.5-300	0.5	303	3	0.066
BSR0.8-300	0.8	303	4	0.095
BSR1-300	1	303	6	0.14

Customer: What should I check before installation?

KAYO: Compare the rack cross section and support arrangement as well as module. Check tooth pitch, pressure angle, rack mounting height and pinion alignment. Confirm backlash and lubrication for the actual duty. Where sections meet, verify the joint geometry and pitch continuity.

Customer: What are the exact model numbers?

KAYO: BSR0.5-300, BSR0.8-300, BSR1-300.

Customer: What should I send for an enquiry?

KAYO: Please send the complete model code, quantity, required travel, mating pinion, mounting details, speed and load. We can discuss the specification and availability for your application. Confirm final dimensions and suitability against the latest manufacturer information.

References: KHK BSR official selection page | KHK rack product range.

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KHK PR / PRF Plastic Racks

Considering the PR plastic rack family? PR and PRF models provide different standard rack options.

Customer: Which family should I specify?

KAYO: Use the complete model designation to identify the module and rack format. Confirm the mating pinion and mounting geometry from the manufacturer drawings.

Customer: Which models and sizes are shown?

KAYO: The current Japanese selection table lists 9 model codes for this group. Module values: 1, 1.5, 2, 2.5, 3. Representative dimensions are shown below, followed by the complete model list.

Model	Module	Overall length (mm)	Face width (mm)	Mass (kg)
PR1-500	1	505	10	0.064
PR2-500	2	505	20	0.27
PR3-500	3	505	30	0.56
PRF2-1000	2	1005.31	20	0.54
PRF3-1000	3	999.03	30	1.11

Customer: What should I check before installation?

KAYO: Confirm the end treatment and allow for the operating environment when setting the mesh. Check tooth pitch, pressure angle, rack mounting height and pinion alignment. Confirm backlash and lubrication for the actual duty. Where sections meet, verify the joint geometry and pitch continuity.

Customer: What are the exact model numbers?

KAYO: PR1-500, PR1.5-500, PR2-500, PR2.5-500, PR3-500, PRF1.5-1000, PRF2-1000, PRF2.5-1000, PRF3-1000.

Customer: What should I send for an enquiry?

KAYO: Please send the complete model code, quantity, required travel, mating pinion, mounting details, speed and load. We can discuss the specification and availability for your application. Confirm final dimensions and suitability against the latest manufacturer information.

References: KHK PR / PRF official selection page | KHK rack product range.

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