V-TYPE GROUND HELICAL GUIDE RACK

V-Type Ground Helical Guide Rack

Precision helical guide rack ground to DIN6e25. S45C/42CrMo steel, HRC55–60° tooth & V-rail hardness. Modules 1.5–3. Custom lengths. UK supplier.

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Description

Precision Engineering · UK Supply · Custom OEM

V-Type Ground Helical Guide Rack

High-precision ground helical rack engineered for demanding linear motion, CNC gantry, and industrial automation applications across the United Kingdom and global markets.

V-Type Ground Helical Guide Rack - Precision Helical Rack for Linear MotionThe V-Type Ground Helical Guide Rack is a specialist linear transmission component designed for environments where conventional straight racks fall short. Its helical tooth geometry — ground to DIN6e25 accuracy — delivers quieter operation, superior load distribution, and reduced backlash compared to standard spur racks. Manufactured from S45C or 42CrMo steel, it combines high-frequency induction hardening (HRC48–52°) with carburising hardening (HRC55–60°) across the tooth flanks, making it a trusted choice for machine tool builders, automation integrators, and heavy-duty linear guide system manufacturers. The V-shaped guide rail interface further enhances rigidity and positional repeatability, making it particularly suited to high-speed gantry systems and precision machining centres now widely adopted across UK engineering facilities.

Why Engineers in the UK Specify This Rack

Selecting the right helical guide rack is rarely straightforward — surface hardness, tooth geometry, rail interface design, and dimensional accuracy all interact in ways that compound over the lifecycle of a machine. This product has been designed to address each of these variables with engineering rigour, rather than relying on post-process surface coatings or tolerance concessions. The four-sided grinding approach — applied to all face surfaces, tooth flanks, and the V-shaped guide rail surface — means every contact zone meets the same DIN6e25 standard. For UK machine builders working to ISO and CE compliance frameworks, this level of geometric consistency simplifies the qualification process considerably.

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DIN6e25 Ground Accuracy
Total pitch error GTF/1000 <0.036mm — meets the highest standard for precision linear motion rack applications.
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Dual Hardening Treatment
High-frequency induction hardening HRC48–52° on tooth surfaces; carburising hardening HRC55–60° on V-guide rail — optimised for wear resistance under cyclic load.
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Four-Surface Grinding
All four faces ground, tooth profile ground, and V-guide rail ground — consistent geometric accuracy across every mating surface.
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Helical Tooth Geometry
Helical (spiral bevel) tooth form reduces noise, smooths load transfer, and extends service life in high-speed gantry and servo-driven systems.
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UK B2B Supply Ready
Standard and custom lengths stocked for prompt dispatch to UK machine shops, automation integrators, and OEM assembly lines.
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S45C / 42CrMo Steel
Premium-grade structural steel offering an ideal balance between machinability, tensile strength, and post-treatment hardness retention.

Working Principle, Material & Application Scenarios

At its core, the V-Type Ground Helical Guide Rack operates by converting the rotary motion of a pinion gear into smooth, controlled linear displacement. The helical tooth angle increases the effective contact ratio compared to straight-tooth racks, meaning more teeth share the load at any given moment — this translates directly to lower dynamic forces per tooth, reduced vibration, and longer mean time between failure in continuous-duty cycle environments. The integrated V-groove rail surface acts as the primary linear guidance interface, eliminating the need for a separate runner rail in many compact machine designs, which simplifies assembly and reduces potential misalignment sources.

From a materials perspective, the S45C / 42CrMo steel substrate provides the toughness needed to absorb shock loads without brittle fracture, while the dual hardening regime ensures the working surfaces resist abrasive wear even in environments with marginal lubrication or particulate contamination. The V-guide rail surface hardness (HRC48–55° / HRC55–60°) has been calibrated specifically to work with hardened steel guide blocks without causing adhesive wear on either mating component.

CNC Machining Centres
Gantry-style CNC routers and machining centres operating at high feed rates, where noise level and positional accuracy are equally critical.
Laser & Plasma Cutting
High-speed laser cutting tables and plasma gantries requiring sub-millimetre path repeatability across extended travel distances.
Robotic Welding Lines
Seventh-axis track systems for collaborative and industrial robots operating in UK automotive and aerospace assembly environments.
Linear Transfer Systems
Automated assembly transfer lines and pallet-changing systems in the medical device, electronics, and precision engineering sectors.
Inspection & Measurement
Co-ordinate measuring machine (CMM) traversing systems and optical inspection gantries requiring minimal vibration and exceptional pitch consistency.

Technical Specification

Precision Grade
DIN6e25
Total Pitch Error
GTF/1000 <0.036mm
Material
S45C / 42CrMo
Tooth Type
Helical
Tooth Hardness
HRC48–52° / HRC55–60°
V-Rail Hardness
HRC48–55° / HRC55–60°
V-Type Ground Helical Guide Rack Technical Specification Table

Unit / Dimension: mm  |  Total pitch error GTF/1000 <0.036mm

Code Module Pt L L2 A B B0 C D B1 A1 G1 G2 F E
VXX66315063 1.5 4.9999 630 5.143 14.5 24.5 22.9 65 100 13 20 7 11 7 500
VXX66315103 1.5 4.9999 1030 5.143 14.5 24.5 22.9 65 100 13 20 7 11 7 900
VXX66320063 1.5 4.9999 630 6.916 19.5 29.5 27.9 65 100 15.5 23.5 9 15 9 500
VXX66320103 1.5 4.9999 1030 6.916 19.5 29.5 27.9 65 100 15.5 23.5 9 15 9 900
VXX66325064 2 6.6666 630 8.76 24.7 33 30.61 70 100 18.5 25.2 9 15 9 500
VXX66325094 2 6.6666 930 8.76 24.7 33 30.61 70 100 18.5 25.2 9 15 9 800
VXX66325124 2 6.6666 1230 8.76 24.7 33 30.61 70 100 18.5 25.2 9 15 9 1100
VXX66335063 3 9.9999 630 12.272 34.6 46.6 43.41 65 100 28.6 36.7 11 18 11 500
VXX66335093 3 9.9999 930 12.272 34.6 46.6 43.41 65 100 28.6 36.7 11 18 11 800
VXX66335123 3 9.9999 1230 12.272 34.6 46.6 43.41 65 100 28.6 36.7 11 18 11 1100

All product codes and specifications are subject to change without prior notice. Please confirm with our sales team before placing an order.

Manufacturing Capability & Custom Orders

Our facility operates a fully integrated production chain for helical rack manufacturing — from raw billet selection through rough milling, heat treatment, grinding, inspection, and protective packaging. The four-axis grinding centre dedicated to V-type guide rack production maintains process Cpk above 1.33 for the critical V-groove angle dimension, giving UK buyers documented process capability evidence for supplier qualification audits. Beyond our standard range, we actively support non-standard requests across virtually every dimension: bespoke lengths up to 3,000mm in a single piece, modified V-groove angles to match proprietary guide blocks, alternative steel grades including 20CrMnTi for through-hardening applications, and rack assembly with pre-drilled mounting holes or laser-etched identification marks for traceability in regulated industries.

For UK machine builders requiring prototype validation ahead of production commitment, we offer sample cutting from standard stock with expedited grinding to your drawing. Our engineering team — with combined application experience exceeding 18 years in precision linear transmission — provides DXF drawing review, pinion matching recommendations, and preload force calculations as part of the standard technical support service. No minimum order quantities apply to custom enquiries.

Customer Success Stories

Case Study: UK Aerospace Tooling Manufacturer — West Midlands
Industry: Aerospace Tooling & Precision Fixtures | Application: Five-Axis Gantry Positioning System

A specialist aerospace tooling company in the West Midlands was upgrading their five-axis composite lay-up gantry to handle larger wing skin panels. Their existing straight rack system was generating positional errors of 0.08mm over a 2,400mm travel — beyond the process tolerance for their AS9100-certified manufacturing programme. After switching to Module 2 V-Type Ground Helical Guide Racks across two parallel axes, travel accuracy improved to consistently below 0.03mm over the full stroke. Additionally, the noise level at 18 m/min traverse dropped by around 9 dB(A), which was noted during a workplace noise assessment as a contributing factor to meeting the Control of Noise at Work Regulations 2005. The project completed on a 14-week timeline, with our team providing rack splicing calculations and pinion selection assistance at no additional charge.

★★★★★

“We’ve sourced helical racks from several European suppliers over the years, and this is the first time we’ve received ground racks where every piece passes our incoming inspection without rework. The V-guide flatness is genuinely impressive for the price point.”

— James Whitfield, Engineering Director
Precision Linear Systems Ltd, Sheffield, UK
★★★★★

“We specified Module 3 racks for a new plasma cutting table build for a Scottish fabricator. Lead time was under four weeks from enquiry to delivery to our workshop in Manchester, and the DIN6e25 certificates were included in the shipment — which made the FAT sign-off very smooth.”

— Sarah Donovan, Procurement Manager
NovaTech Motion, Manchester, UK
★★★★★

“The custom length enquiry process was more straightforward than I expected. Our robot track required 2,200mm single-piece racks, and the team came back with a feasibility answer and price within 48 hours. No minimum order, and the first delivery was on time. Will be the go-to supplier for future projects.”

— Marcus Osei, Robotics Integration Lead
AxisWorks Automation, Bristol, UK

Frequently Asked Questions

What is the difference between a V-type ground helical guide rack and a standard straight rack for UK CNC machine builders?
A V-type ground helical rack differs in three important respects. The helical tooth geometry distributes the meshing load across more tooth area simultaneously, reducing impact noise and extending fatigue life compared to straight-cut racks. The V-groove rail interface on the body provides an integrated linear guide surface, replacing a separate runner rail in many designs and improving overall system rigidity. Finally, the all-over grinding process — applied to both the tooth flanks and the V-guide surface — achieves DIN6e25 precision, which is rarely achievable with straight racks produced to milled or shaved finishes. For UK CNC machine builders working to tight positional tolerances, particularly on long-travel gantry axes, these distinctions translate directly into measurable machine accuracy and reduced noise at workstation level.
How much does a V-type helical guide rack cost, and where can I get a price quote for supply to the United Kingdom?
Pricing varies depending on module size (M1.5, M2, or M3), rack length (630mm to 1230mm standard), and order quantity. For standard catalogue sizes, indicative prices are available on request — typically within one working day. Custom lengths, non-standard material grades, or modified geometry will require a formal quotation based on your technical drawing. To get a price for supply to the UK, email your requirements including the product code (e.g. VXX66325064), quantity, and any drawing references to sales@farm-equipment-parts.com. We supply directly to UK machine builders, system integrators, and distributors with no minimum order on standard sizes.
Which pinion gear should I use with a Module 2 V-type helical rack for a servo-driven linear axis in an industrial robot track application?
For a Module 2 helical rack, you should use a matching Module 2 helical pinion with the same helix angle and hand (right-hand or left-hand) as the rack. The number of teeth on the pinion depends on your desired linear speed per servo revolution — a 20-tooth pinion with Module 2 gives a pitch circle circumference of approximately 125.6mm per revolution. For robot seventh-axis track applications, a minimum of 17 teeth is recommended to avoid undercutting, and material should be hardened alloy steel to match the rack’s HRC55–60° surface. Our technical team can recommend specific pinion options based on your torque and speed requirements — contact us with your servo output specifications for a matched drive recommendation.
Where can I find a reliable helical rack supplier in the UK that offers custom lengths and DIN-certified ground racks for precision engineering?
We supply DIN6e25-certified ground helical racks directly to UK precision engineering companies, with standard sizes typically available ex-works within two to three weeks. For custom lengths or specifications, lead times depend on complexity — most bespoke requests fall within four to eight weeks. Our customers in the UK range from small machine tool builders to aerospace fixture manufacturers, and we provide full material and inspection certificates with each order. To enquire about supply for your specific application, use the contact details on this page or email sales@farm-equipment-parts.com with your technical requirements.
What hardness level should I specify when ordering an induction hardened helical rack for a high-speed gantry cutting machine in the UK fabrication industry?
For high-speed gantry cutting applications — plasma, laser, or waterjet — the tooth surface hardness should be at least HRC55–60° to withstand the combination of high traverse speeds, frequent direction reversals, and potential contamination from cutting debris. The V-Type Ground Helical Guide Rack achieves this through carburising hardening on the tooth flanks, while the core remains tougher (lower hardness) to resist shock fracture. This dual-zone hardness profile is particularly well-suited to the intermittent, variable-load duty cycle typical of cutting gantries. Specifying anything below HRC50° for this application risks premature wear on the tooth tips, which in our experience becomes apparent after 3,000–5,000 operating hours in a fabrication shop environment.

Ready to specify the V-Type Ground Helical Guide Rack for your UK project?

Email Us: sales@farm-equipment-parts.com

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