{"id":1135,"date":"2026-08-27T08:06:55","date_gmt":"2026-08-27T08:06:55","guid":{"rendered":"https:\/\/www.farm-equipment-parts.com\/?post_type=product&p=1135"},"modified":"2026-08-27T08:32:36","modified_gmt":"2026-08-27T08:32:36","slug":"ground-helical-gear-module-3-4","status":"publish","type":"product","link":"https:\/\/www.farm-equipment-parts.com\/ko\/product\/ground-helical-gear-module-3-4\/","title":{"rendered":"Ground Helical Gear \u2014 Module 3 & 4"},"content":{"rendered":"
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DIN6 Grade 5 | Gear Ground | Helix Angle 19\u00b031’42”<\/p>\n

Ground Helical Gear \u2014 Module 3 & 4<\/h2>\n

Precision-ground helical gears engineered for UK industrial automation, CNC machinery, and heavy-duty power transmission. 40Cr \/ 20CrMnTi alloy steel, HRC 48\u201355 induction hardened or HRC 55\u201360 carburised, manufactured to DIN6 Grade 5 tolerances.<\/p>\n

Get a Quote<\/a><\/p>\n<\/div>\n

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Whether you are upgrading a CNC machining centre on a factory floor in Birmingham, integrating precision drives into an automated conveyor in Manchester, or sourcing replacement gears for robotics in London, the Ground Helical Gear Module 3 & 4 delivers the dimensional accuracy and surface finish that demanding UK engineering applications require. These gears are designed to transmit torque smoothly with reduced noise and vibration \u2014 a direct result of the helical tooth geometry and the final gear-grinding operation that brings every tooth flank to a mirror-quality surface.<\/p>\n

The helical angle of 19\u00b031’42” is carefully chosen to balance axial thrust with torque-carrying capacity, making these ground helical gears a reliable choice for multi-stage gearboxes, servo-driven linear systems, and precision indexing tables used across British manufacturing, aerospace component production, and pharmaceutical packaging lines.<\/p>\n

DIN6 Grade 5<\/span>
\n40Cr \/ 20CrMnTi<\/span>
\nHRC 48\u201360<\/span>
\nGear Ground<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n
Request a Quote \u2014 sales@farm-equipment-parts.com<\/a><\/div>\n
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Why Choose Ground Helical Gears<\/h2>\n

Performance attributes that matter to UK engineers and procurement teams<\/p>\n

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Gear-Ground Finish<\/h3>\n

Each tooth flank is processed through a final gear-grinding operation, achieving surface roughness values that reduce friction, extend service life, and dramatically lower running noise \u2014 essential for precision CNC environments across UK factories.<\/p>\n<\/div>\n

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Premium Alloy Steel<\/h3>\n

40Cr steel delivers excellent tensile strength and impact resistance for moderate-to-heavy loads, while 20CrMnTi is specified for applications demanding superior case depth and core toughness \u2014 both materials selected specifically to handle demanding load cycles without fatigue failure.<\/p>\n<\/div>\n

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DIN6 Grade 5 Precision<\/h3>\n

Manufactured to DIN6 international Grade 5 standards, these ground helical gears provide repeatable tooth spacing accuracy and minimal runout, which translates into consistent positioning performance in servo-driven or CNC-controlled axis applications used in robotics and automation.<\/p>\n<\/div>\n

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Dual Hardening Options<\/h3>\n

HRC 48\u201355 via induction hardening suits general industrial power transmission, while the HRC 55\u201360 carburising route provides exceptional contact fatigue resistance for high-cycle, high-load scenarios \u2014 giving UK specifiers the flexibility to match the gear to the actual duty cycle rather than over-engineering every application.<\/p>\n<\/div>\n

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Optimised Helix Angle<\/h3>\n

The 19\u00b031’42” helix angle is not arbitrary \u2014 it provides the ideal balance between smooth tooth engagement and manageable axial thrust force, reducing bearing loading on the shaft while still achieving the load-sharing benefits that separate helical gears from straight-cut alternatives in high-speed drive trains.<\/p>\n<\/div>\n

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Custom Configurations<\/h3>\n

Standard catalogue items ship promptly, but our engineering team also supports fully bespoke configurations \u2014 modified bore diameters, altered keyway positions, specific tooth counts, or surface coating requirements \u2014 all tailored to the exact drawings or performance specifications you supply.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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How Ground Helical Gears Work<\/h2>\n

Material science, manufacturing process, and application logic explained<\/p>\n

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Unlike spur gears that engage along a single line of contact, ground helical gears engage progressively as the teeth wrap around the gear blank at the helix angle. This gradual engagement distributes the load across multiple teeth simultaneously, resulting in quieter operation, less vibration transfer into the machine structure, and higher torque capacity for a given module size. In UK factory environments \u2014 where noise-at-work regulations under the Control of Noise at Work Regulations 2005 are enforced \u2014 the acoustic advantage of helical gearing is a practical compliance benefit, not just an engineering nicety.<\/p>\n

The manufacturing sequence begins with high-quality bar stock of either 40Cr or 20CrMnTi alloy steel, selected for their hardenability profiles and machinability. After rough turning and hobbing, heat treatment is applied: induction hardening (HRC 48\u201355) creates a hard surface layer while preserving a tough core, whereas carburising (HRC 55\u201360) diffuses carbon into the surface to a carefully controlled case depth before quenching. Both routes are followed by finish gear grinding, which corrects any distortion introduced during heat treatment and brings the tooth profile back to DIN6 Grade 5 accuracy. The result is a ground helical gear that retains its precision under real operating temperatures and loads \u2014 a critical requirement for continuous-duty industrial drives.<\/p>\n

These ground helical gears see active use in: CNC machining centres (X\/Y\/Z axis drives), automated packaging machinery, robotic joint drives, industrial conveyor reduction stages, and agricultural machinery gearboxes across England, Scotland, and Wales. Their compatibility with standard rack systems also makes them ideal for linear motion applications \u2014 pairing naturally with a V-Type Ground Helical Guide Rack or a Rectangular Guide Rail to form a complete precision linear drive system.<\/p>\n<\/div>\n

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Tooth Type<\/h4>\n

Helical \u2014 progressive engagement for smooth, low-noise torque transmission.<\/p>\n<\/div>\n

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Material Grades<\/h4>\n

40Cr (general industrial) \u00b7 20CrMnTi (high-cycle, carburised case depth).<\/p>\n<\/div>\n

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Hardness Range<\/h4>\n

HRC 48\u201355 (induction) or HRC 55\u201360 (carburising + quench).<\/p>\n<\/div>\n

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Finish Process<\/h4>\n

Gear grinding after heat treatment \u2014 restores DIN6 Grade 5 accuracy regardless of distortion from hardening.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Technical Specifications<\/h2>\n

Accuracy Grade: DIN6 Grade 5 \u00a0|\u00a0 Material: 40Cr \/ 20CrMnTi \u00a0|\u00a0 Tooth Type: Helical \u00a0|\u00a0 Right Helix Angle: 19\u00b031’42” \u00a0|\u00a0 Hardness: Induction HRC 48\u201352 \/ Carburised HRC 50\u201355 \u00a0|\u00a0 Manufacturing: Gear Ground<\/p>\n

Unit \/ Dimension: mm. All specifications subject to change without prior notice; please confirm with our team before ordering.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Code<\/th>\nModule<\/th>\nTooth No.<\/th>\nd1H6<\/th>\nd2<\/th>\nd3<\/th>\nD<\/th>\nW1<\/th>\nW2<\/th>\nW3<\/th>\nWJS9<\/th>\nM<\/th>\n<\/tr>\n<\/thead>\n
YMCL302555<\/td>\n3<\/td>\n20<\/td>\n25<\/td>\n\u03a650<\/td>\n\u03a663.66<\/td>\n\u03a669.66<\/td>\n30<\/td>\n55<\/td>\n28.3<\/td>\n8<\/td>\n8<\/td>\n<\/tr>\n
YMCL302580<\/td>\n3<\/td>\n20<\/td>\n25<\/td>\n\u03a650<\/td>\n\u03a663.66<\/td>\n\u03a669.66<\/td>\n30<\/td>\n80<\/td>\n28.3<\/td>\n8<\/td>\n8<\/td>\n<\/tr>\n
YMCL303260<\/td>\n3<\/td>\n20<\/td>\n32<\/td>\n\u03a655<\/td>\n\u03a663.66<\/td>\n\u03a669.66<\/td>\n28<\/td>\n60<\/td>\n35.3<\/td>\n10<\/td>\n8<\/td>\n<\/tr>\n
YMCL303255<\/td>\n3<\/td>\n25<\/td>\n32<\/td>\n\u03a666<\/td>\n\u03a679.57<\/td>\n\u03a685.57<\/td>\n30<\/td>\n55<\/td>\n35.3<\/td>\n10<\/td>\n8<\/td>\n<\/tr>\n
YMCL303565<\/td>\n3<\/td>\n25<\/td>\n35<\/td>\n\u03a655<\/td>\n\u03a679.57<\/td>\n\u03a685.57<\/td>\n28<\/td>\n65<\/td>\n38.8<\/td>\n10<\/td>\n8<\/td>\n<\/tr>\n
YMCL304080<\/td>\n3<\/td>\n25<\/td>\n40<\/td>\n\u03a670<\/td>\n\u03a679.58<\/td>\n\u03a685.58<\/td>\n39<\/td>\n80<\/td>\n43.3<\/td>\n12<\/td>\n12<\/td>\n<\/tr>\n
YMCL303282<\/td>\n3<\/td>\n25<\/td>\n32<\/td>\n\u03a666<\/td>\n\u03a679.57<\/td>\n\u03a685.57<\/td>\n30<\/td>\n82<\/td>\n35.3<\/td>\n10<\/td>\n8<\/td>\n<\/tr>\n
YMCL304084<\/td>\n3<\/td>\n30<\/td>\n40<\/td>\n\u03a668<\/td>\n\u03a695.49<\/td>\n\u03a6101.5<\/td>\n29<\/td>\n82<\/td>\n43.3<\/td>\n12<\/td>\n8<\/td>\n<\/tr>\n
YMCL404550<\/td>\n4<\/td>\n22<\/td>\n45<\/td>\n\u03a665<\/td>\n\u03a693.37<\/td>\n\u03a6101.4<\/td>\n40<\/td>\n50<\/td>\n38.3<\/td>\n10<\/td>\n8<\/td>\n<\/tr>\n
YMCL403575<\/td>\n4<\/td>\n24<\/td>\n35<\/td>\n\u03a655<\/td>\n\u03a6101.86<\/td>\n\u03a6109.9<\/td>\n40<\/td>\n75<\/td>\n38.3<\/td>\n10<\/td>\n8<\/td>\n<\/tr>\n
YMCL404075<\/td>\n4<\/td>\n24<\/td>\n40<\/td>\n\u03a662<\/td>\n\u03a6101.86<\/td>\n\u03a6109.9<\/td>\n40<\/td>\n75<\/td>\n43.3<\/td>\n12<\/td>\n10<\/td>\n<\/tr>\n
YMCL404080<\/td>\n4<\/td>\n25<\/td>\n40<\/td>\n\u03a680<\/td>\n\u03a6106.103<\/td>\n\u03a6114.103<\/td>\n42<\/td>\n80<\/td>\n43.3<\/td>\n12<\/td>\n10<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Red rows = Module 3 \u00a0|\u00a0 Blue rows = Module 4 \u00a0|\u00a0 All dimensions in mm.<\/p>\n<\/div>\n

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Complete Your Linear Drive System<\/h2>\n
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Rectangular Guide Rail<\/a><\/h3>\n

Precision-ground rectangular profile guide rails for linear motion systems \u2014 compatible with ground helical gear drives in automated machinery across UK industrial sectors.<\/p>\n

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V-Type Ground Helical Guide Rack<\/a><\/h3>\n

Pairs directly with Module 3 & 4 ground helical gears to form a complete rack-and-pinion drive \u2014 ideal for CNC gantry axes, robotic arms, and high-speed linear transfer systems in UK manufacturing.<\/p>\n

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Verified Customer Outcomes<\/h2>\n

Real applications from industrial buyers who source ground helical gears for UK and European projects<\/p>\n

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Case Study<\/div>\n
West Midlands Automotive Automation \u00b7 Birmingham, UK<\/div>\n<\/div>\n

CNC Transfer Line Rebuild \u2014 Cycle Time Reduced by 18%<\/h3>\n

A tier-2 automotive supplier operating a multi-station CNC transfer line in Birmingham was experiencing premature wear in the axis drive gears of their machining centres. Their existing hobbed spur gears were generating excessive vibration at 2,000 rpm, causing surface finish failures on aluminium housing components. After switching to YMCL303255 and YMCL404075 ground helical gears \u2014 Module 3 and Module 4 respectively \u2014 the contact noise dropped significantly and axis positioning repeatability improved from \u00b10.025 mm to \u00b10.010 mm. The smoother drive also allowed the line speed to be increased by 18%, cutting per-part cycle time and improving overall equipment effectiveness. The procurement team noted that the DIN6 Grade 5 certification simplified the approval process under their internal quality management framework.<\/p>\n

Automotive Sector<\/span>
\nCNC Machining Centre<\/span>
\nBirmingham, England<\/span><\/div>\n<\/div>\n
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“We trialled the Module 4 ground helical gears on a robotic palletising cell at our logistics centre in Leeds. The noise reduction compared to our old hobbed gears was immediately noticeable on the factory floor. After eight months of three-shift operation, there is no measurable wear on the tooth flanks. We’ve since standardised these gears across four additional robot axes.”<\/p>\n

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Engineering Manager<\/p>\n

Logistics Automation Company \u00b7 Leeds, West Yorkshire, UK<\/p>\n<\/div>\n<\/div>\n

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“Our pharmaceutical packaging line in Hertfordshire required very low backlash and minimal vibration transmission into the tablet counting heads. The YMCL303282 ground helical gears met our specification exactly \u2014 DIN6 Grade 5 with verified surface finish documentation. The supplier provided a full material certificate without prompting, which satisfied our GMP validation requirements without any back-and-forth.”<\/p>\n

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Procurement Director<\/p>\n

Pharmaceutical Packaging OEM \u00b7 Hertfordshire, England<\/p>\n<\/div>\n<\/div>\n

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“We source Module 3 ground helical gears for the axis drives on our plasma cutting tables in Glasgow. Competitive quote, accurate dimensional inspection report shipped with every batch, and the custom bore diameters we requested were machined to tolerance on first delivery. Turnaround time from order to receipt in Scotland was well within our project schedule.”<\/p>\n

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Lead Mechanical Engineer<\/p>\n

CNC Cutting Table Manufacturer \u00b7 Glasgow, Scotland<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Manufacturing Capability & Custom Engineering<\/h2>\n

Built to your specification \u2014 not just to a catalogue<\/p>\n

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Our manufacturing facility operates a fully integrated production line covering raw material inspection, bar turning, gear hobbing, heat treatment, and computer-controlled gear grinding on Klingelnberg and Gleason platforms. Every finished ground helical gear passes through dimensional inspection using Zeiss coordinate measuring machines, and gear accuracy is reported to full DIN6 Grade 5 tolerance stacks \u2014 not just pitch error alone. Material traceability records are maintained from bar stock to shipment, providing the documentation chain that UK customers in aerospace, medical devices, and defence supply chains regularly require.<\/p>\n

Beyond catalogue items, our product customisation service handles: non-standard bore diameters and keyway orientations, modified face widths, alternative helix angles for specific axial thrust requirements, shaft extensions, flange integration, black oxide or zinc-phosphate surface protection, and bespoke module \/ tooth-count combinations that are not listed in the standard range. Engineering drawings in DXF, DWG, STEP, or IGES format are accepted directly, and our applications engineering team will review your specification within one working day to provide a manufacturability assessment and indicative lead time before you commit to an order.<\/p>\n<\/div>\n

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Custom Order Capabilities<\/h3>\n