{"id":2030,"date":"2026-04-10T07:21:11","date_gmt":"2026-04-10T07:21:11","guid":{"rendered":"https:\/\/helicalcutgears.top\/?post_type=product&p=2030"},"modified":"2026-04-10T07:21:11","modified_gmt":"2026-04-10T07:21:11","slug":"parallel-axis-helical-gears-high-speed-heavy-load-transmission-for-parallel-shaft-systems","status":"publish","type":"product","link":"https:\/\/helicalcutgears.top\/de\/product\/parallel-axis-helical-gears-high-speed-heavy-load-transmission-for-parallel-shaft-systems\/","title":{"rendered":"Schr\u00e4gverzahnte Parallelachsengetriebe \u2013 Hochgeschwindigkeits-Schwerlastgetriebe f\u00fcr Parallelwellensysteme"},"content":{"rendered":"
\n

Parallel Axis Helical Gears \u2014 Overview<\/h2>\n

Parallel axis helical gears<\/strong> are a subset of the broader Stirnrad<\/strong> family specifically designed so that the two mating gears share a pair of parallel rotation axes. Unlike crossed schr\u00e4gverzahnte Zahnr\u00e4der<\/strong> \u2014 where the shafts run at an angle to each other \u2014 parallel axis helical gears keep both shafts running in the same plane and direction, enabling efficient line contact between meshing teeth. The teeth are cut at a helix angle to the axis of rotation, so engagement begins at one edge of the tooth face and travels diagonally across the face width as the gears rotate. This progressive contact spreads the load over a longer arc than a spur gear tooth pair, which reduces the instantaneous load per unit of face width and produces noticeably smoother, quieter transmission even at high speeds.<\/p>\n

\u00a0\u00a0\"Parallelachsige<\/p>\n

The key engineering distinction between parallel axis and crossed helical configurations lies in the contact geometry: parallel axis gears develop line contact that transitions to area contact as tooth pairs come fully into mesh, giving them substantially higher load capacity than crossed helical arrangements, which maintain only point contact throughout engagement. For heavy loads, high torques, or continuous-duty cycles, parallel axis helical gears<\/strong> are the standard choice in industrial gearboxes. Korea Ever-Power Worm Gear Co.,Ltd manufactures these gears from multiple material grades, covers precision levels from DIN6 through DIN9, and supports a wide range of surface treatments \u2014 supplying to semiconductor equipment builders, medical device manufacturers, machine tool integrators, and general industrial drive designers across Korea and the surrounding region.<\/p>\n

Technische Spezifikationen<\/h2>\n

The table below summarizes the standard parameter range and commercial details for the Korea Ever-Power parallel axis helical gear series. Non-standard modules, special materials, and custom surface finishes are available on request.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nSpezifikation<\/th>\n<\/tr>\n
Model Number<\/td>\nM1, M1.5, M2, M2.5, M3, M4, M5, M8, M12 and etc.<\/td>\n<\/tr>\n
Material<\/td>\nBrass, C45 steel, Stainless steel, Copper, POM, Aluminum, Alloy, and so on<\/td>\n<\/tr>\n
Oberfl\u00e4chenbehandlung<\/td>\nZinc-plated, Nickel plated, Passivation, Oxidation, Anodization, Geomet, Dacromet, Black Oxide, Phosphatizing, Powder Coating, Electrophoresis<\/td>\n<\/tr>\n
Standard<\/td>\nISO, DIN, ANSI, JIS, BS, and Non-standard<\/td>\n<\/tr>\n
Pr\u00e4zision<\/td>\nDIN6, DIN7, DIN8, DIN9<\/td>\n<\/tr>\n
Teeth Treatment<\/td>\nHardened, Milled, or Ground<\/td>\n<\/tr>\n
Toleranz<\/td>\n0.001mm \u2013 0.01mm \u2013 0.1mm<\/td>\n<\/tr>\n
Beenden<\/td>\nShot\/sandblast, heat treatment, annealing, tempering, polishing, anodizing, zinc-plated<\/td>\n<\/tr>\n
Items Packing<\/td>\nPlastic bag + Cartons or Wooden Packing<\/td>\n<\/tr>\n
Zahlungsbedingungen<\/td>\nT\/T, L\/C<\/td>\n<\/tr>\n
Production Lead Time<\/td>\n20 business days for sample, 25 days for bulk<\/td>\n<\/tr>\n
Samples<\/td>\nSample price range $2\u2013$100; sample express request paid by clients<\/td>\n<\/tr>\n
Anwendung<\/td>\nAutomatic controlling machine, semiconductor industry, general industry machinery, medical equipment, solar energy equipment, machine tool, parking system, high-speed rail and aviation transportation equipment, etc.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

How Parallel Axis Helical Gears Work<\/h2>\n

\"parallel<\/p>\n

In a parallel axis arrangement, both gear shafts lie in the same plane and run in the same direction. For the gears to mesh correctly, the two mating gears must share the same normal module and pressure angle, but carry opposite helix hands \u2014 one left-hand and one right-hand. This pairing ensures that the helix angle of each gear complements the other at the contact line, maintaining consistent tooth geometry throughout the mesh cycle. The lead angle relationship also means the gears can be adjusted in the axial direction within a limited range without disrupting the contact pattern, which is useful in gearboxes where slight assembly misalignment must be tolerated.<\/p>\n

High Coincidence Ratio \u2014 The Core Load-Sharing Mechanism<\/h3>\n

The coincidence ratio (also called contact ratio) of a gear pair describes how many pairs of teeth share the load at any given moment. Spur gears typically operate with a contact ratio of 1.2\u20131.6, meaning load transitions sharply between one tooth pair and the next. Parallel axis helical gears<\/strong> achieve a higher total contact ratio because the helical overlap adds a second component to the transverse contact ratio. At helix angles of 15\u00b0\u201330\u00b0 with typical face widths, the total contact ratio often reaches 2.0\u20133.5. More tooth pairs in simultaneous contact means each individual tooth root and contact surface carries a smaller fraction of the total load, lowering bending stress and Hertzian contact stress at any instant. This is the primary engineering reason Schr\u00e4gverzahnung<\/strong> in parallel axis configuration carry higher loads than spur gears of identical module and diameter.<\/p>\n

Compact Structure Through Reduced Minimum Tooth Count<\/h3>\n

Undercutting \u2014 the removal of tooth root material during hobbing \u2014 limits the minimum number of teeth a spur gear can carry before the tooth root is structurally compromised. The helix angle effectively increases the apparent number of teeth in the normal plane, which means parallel axis helical gears<\/strong> can be cut with fewer teeth than spur gears without undercutting risk. Fewer teeth on the pinion allows a smaller pinion diameter for the same module, tightening the center distance and reducing gearbox envelope size. For equipment where packaging space is a premium \u2014 semiconductor handling robots, multi-axis machine tool spindle heads, medical imaging drives \u2014 this compactness is a direct design advantage. For the full schr\u00e4gverzahnte Zahnr\u00e4der<\/a> catalog including various module and tooth count options, refer to our product listings.<\/p>\n

Core Transmission Advantages<\/h2>\n

\"Korea<\/p>\n

\n
\n

\u25b6 Superior Meshing Performance<\/strong><\/p>\n

Force on each tooth increases gradually from zero to peak and returns to zero through the engagement arc, eliminating the abrupt load spikes that cause vibration in straight-cut spur gears. Suitable for both high-speed and heavy-load operating conditions.<\/p>\n<\/div>\n

\n

\u25b6 High Contact Ratio<\/strong><\/p>\n

Helical overlap increases the total contact ratio well above spur gear levels. Multiple tooth pairs share the applied load simultaneously, raising the gear pair’s torque capacity and extending tooth fatigue life under cyclic duty.<\/p>\n<\/div>\n

\n

\u25b6 Compact and Lightweight Structure<\/strong><\/p>\n

Lower minimum tooth count before undercutting allows smaller pinion diameters for a given module. Gearbox center distances can be tightened, reducing housing size and overall drive train weight \u2014 a benefit in mobile or space-constrained installations.<\/p>\n<\/div>\n

\n

\u25b6 Smooth Starting and Low Noise<\/strong><\/p>\n

Gradual engagement reduces dynamic load during start-up and speed changes. Operating noise is measurably lower than equivalent spur gear arrangements, particularly important in semiconductor cleanrooms, medical labs, and office automation environments.<\/p>\n<\/div>\n

\n

\u25b6 Fine Transmission Ratio Classification<\/strong><\/p>\n

The module combination system from M1 to M12 allows precise gear ratio selection for a wide range of input-output speed combinations without resorting to non-standard tooth counts or compound gear stages in many cases.<\/p>\n<\/div>\n<\/div>\n

Material and Surface Treatment Options<\/h2>\n

\"helical<\/p>\n

One of the practical strengths of the Korea Ever-Power parallel axis helical gear<\/strong> range is its breadth of material and surface treatment options. The same gear form is available across very different material classes, allowing the designer to optimize for strength, corrosion resistance, weight, or cost without changing the tooth geometry.<\/p>\n