{"id":514,"date":"2026-05-25T06:57:27","date_gmt":"2026-05-25T06:57:27","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=514"},"modified":"2026-05-25T06:57:27","modified_gmt":"2026-05-25T06:57:27","slug":"pzb-helical-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/ru\/product\/pzb-helical-planetary-gearbox\/","title":{"rendered":"\u041f\u043b\u0430\u043d\u0435\u0442\u0430\u0440\u043d\u044b\u0439 \u0440\u0435\u0434\u0443\u043a\u0442\u043e\u0440 \u0441 \u043a\u043e\u0441\u043e\u0437\u0443\u0431\u044b\u043c\u0438 \u0448\u0435\u0441\u0442\u0435\u0440\u043d\u044f\u043c\u0438 \u0434\u043b\u044f \u043c\u043e\u0449\u043d\u044b\u0445 \u043f\u0440\u0438\u0432\u043e\u0434\u043e\u0432 \u043d\u0435\u043f\u0440\u0435\u0440\u044b\u0432\u043d\u043e\u0433\u043e \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u2014 \u0441\u0435\u0440\u0438\u044f PZB (60\u2013220PZB)"},"content":{"rendered":"

<\/main><\/p>\n
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Helical Planetary Gearbox \u2014 High Power, Low Noise, Continuous Duty<\/h2>\n
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\"PZB<\/p>\n

\n
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\u226468 dB<\/div>\n
Noise Level<\/div>\n<\/div>\n
\n
2,000<\/div>\n
Max Torque (N\u00b7m)<\/div>\n<\/div>\n
\n
50 kW<\/div>\n
Max Motor Power<\/div>\n<\/div>\n
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97%<\/div>\n
Peak Efficiency<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n

The PZB series helical planetary gearbox<\/strong> occupies a distinct performance class that no other single-series reducer addresses: high continuous power (up to 50 kW), high torque density, and noise held to \u226468 dB(A)<\/strong> across the full operating range. Where standard spur-planet units generate audible tooth-mesh harmonics at elevated power levels, PZB helical tooth geometry produces gradual progressive tooth engagement that distributes impact loads over time and reduces sound pressure by 8\u201312 dB versus equivalent spur-tooth designs.<\/p>\n

Six frame sizes from 60PZB through 220PZB cover output torque from 40 N\u00b7m to 2,000 N\u00b7m<\/strong>, with maximum axial shaft loading reaching 50,000 N<\/strong> on the 220PZB frame \u2014 a capacity that eliminates external thrust bearings on wind turbine pitch drives and large rotary table installations. Single-stage efficiency of \u226597%<\/strong> means PZB series runs cooler than parallel-shaft helical competitors at equivalent power, reducing thermal management requirements in enclosed drive cabinets and machine housings.<\/p>\n

\n
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\ud83d\udd07 \u226468 dB Noise<\/div>\n
Helical teeth reduce mesh noise 8\u201312 dB vs spur planet designs at equivalent power.<\/div>\n<\/div>\n
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\u26a1 Up to 50 kW<\/div>\n
Only planetary series reaching 50,000 W \u2014 bridging servo-scale and industrial-scale power.<\/div>\n<\/div>\n
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\ud83c\udfcb\ufe0f 50,000 N Axial<\/div>\n
220PZB axial shaft load capacity eliminates external thrust bearing requirements.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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60PZB \u2013 220PZB Model Comparison<\/h2>\n

All six frames share the same helical tooth profile geometry, sealed lubrication system, and dual-support output shaft bearing arrangement. Frame size determines torque, axial load capacity, and maximum motor power input.<\/p>\n

\"PZB \"PZB<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\n60PZB<\/th>\n90PZB<\/th>\n120PZB<\/th>\n150PZB<\/th>\n180PZB<\/th>\n220PZB<\/th>\n<\/tr>\n<\/thead>\n
Rated Output Torque<\/td>\n40\u2013200
\nN\u00b7m<\/span><\/td>\n		100\u2013450
\nN\u00b7m<\/span><\/td>\n		200\u2013750
\nN\u00b7m<\/span><\/td>\n		350\u20131,200
\nN\u00b7m<\/span><\/td>\n		600\u20131,600
\nN\u00b7m<\/span><\/td>\n		900\u20132,000
\nN\u00b7m<\/span><\/td>\n<\/tr>\n
Max Axial Shaft Load<\/td>\n\u2014<\/td>\n8,000 N<\/td>\n12,000 N<\/td>\n20,000 N<\/td>\n35,000 N<\/td>\n50,000 N<\/td>\n<\/tr>\n
Compatible Motor Power<\/td>\n0.5\u20133 kW<\/td>\n2\u20137.5 kW<\/td>\n5\u201315 kW<\/td>\n11\u201322 kW<\/td>\n18\u201337 kW<\/td>\n30\u201350 kW<\/td>\n<\/tr>\n
Backlash (Precision)<\/td>\n\u2264 3 arcmin (single-stage)<\/td>\n\u2264 5 arcmin (two-stage)<\/td>\n<\/tr>\n
\u042d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u044c<\/td>\n\u2265 97% single-stage \u00b7 \u2265 94% two-stage<\/td>\n<\/tr>\n
Noise Level<\/td>\n\u2264 68 dB(A) at rated speed \u2014 all frame sizes<\/td>\n<\/tr>\n
Gear Ratio Range<\/td>\n3 : 1 \u2014 100 : 1<\/td>\n<\/tr>\n
\u0420\u0430\u0431\u043e\u0447\u0430\u044f \u0442\u0435\u043c\u043f\u0435\u0440\u0430\u0442\u0443\u0440\u0430<\/td>\n\u221210 \u00b0C to +90 \u00b0C<\/td>\n<\/tr>\n
Mounting Orientation<\/td>\nAny direction<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\u25b8 Key Differentiator: <\/span>
\n
\nPZB backlash (\u22643 arcmin single-stage) is tighter than PF series<\/strong> and matches PLE\/PLF precision grade \u2014 while supporting 8\u00d7 higher motor power<\/strong> than PLE\/PLF maximum. This combination of precision and power is unique to PZB series across the entire product line.
\n<\/span><\/div>\n<\/section>\n

<\/p>\n

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Why Helical Teeth Change Everything at High Power<\/h2>\n

Every planetary gearbox in our range \u2014 PL, PF, PLE\/PLF \u2014 uses spur-cut planet gear teeth that engage abruptly along the full tooth face width simultaneously. This produces a periodic impact load at each mesh cycle that is tolerable at low and medium power levels but becomes the dominant noise and vibration source above 5\u20137 kW input. PZB series eliminates this limitation through helical tooth geometry that changes the engagement physics fundamentally.<\/p>\n

The Helical Advantage \u2014 Five Engineering Benefits<\/h3>\n
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  1. 1<\/span>\n
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    Progressive Tooth Engagement \u2014 Noise Reduced 8\u201312 dB<\/strong><\/p>\n

    Helical teeth engage along a diagonal line that sweeps across the tooth face, distributing the mesh force over time rather than applying it instantaneously. This reduces the peak impact force at each mesh event \u2014 the root cause of gear whine \u2014 by 60\u201375%, translating to an 8\u201312 dB sound pressure reduction that is audible without instrumentation at power levels above 3 kW.<\/p>\n<\/div>\n<\/li>\n

  2. 2<\/span>\n
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    Higher Contact Ratio \u2014 Greater Load Distribution<\/strong><\/p>\n

    Helical tooth overlap increases the effective contact ratio from approximately 1.6 (spur) to 2.2\u20132.8, meaning more teeth share load simultaneously. This reduces Hertz contact stress on individual tooth flanks, extending surface fatigue life by 40\u201360% compared to spur-tooth equivalents at the same torque level \u2014 directly enabling the higher torque ratings of PZB versus standard series at equal frame size.<\/p>\n<\/div>\n<\/li>\n

  3. 3<\/span>\n
    \n

    Dual-Support Output Bearing \u2014 50,000 N Axial Capacity<\/strong><\/p>\n

    Helical tooth contact produces an axial thrust force proportional to helix angle and transmitted torque. PZB series incorporates paired angular-contact ball bearings in the output shaft that are specifically sized to carry both helical axial thrust and external axial loads up to 50,000 N simultaneously \u2014 without the need for external thrust bearing arrangements that add cost and mounting complexity.<\/p>\n<\/div>\n<\/li>\n

  4. 4<\/span>\n
    \n

    Precision-Ground Helical Flanks \u2014 \u22643 Arcmin Backlash<\/strong><\/p>\n

    Counter-intuitively, helical ground gears achieve tighter backlash than spur gears at equivalent manufacturing cost because the diagonal contact line allows controlled lead and profile corrections during grinding that eliminate the tooth-to-tooth spacing variations responsible for backlash inconsistency. PZB single-stage precision grade achieves \u22643 arcmin \u2014 matching PLE\/PLF at 8\u00d7 higher power rating.<\/p>\n<\/div>\n<\/li>\n

  5. 5<\/span>\n
    \n

    Vibration Isolation at High Speed<\/strong><\/p>\n

    At input speeds above 2,000 rpm, spur-gear mesh frequency harmonics can excite structural resonances in machine frames and acoustic enclosures. PZB helical geometry distributes mesh excitation over a wider frequency band at lower amplitude \u2014 making PZB the correct choice when vibration isolation specifications or acoustic limit requirements apply to the drive installation environment.<\/p>\n<\/div>\n<\/li>\n<\/ol>\n<\/section>\n

    <\/p>\n

    \n

    PZB vs Alternative High-Power Transmission Technologies<\/h2>\n

    High-power industrial drives have historically used parallel-shaft helical reducers or large inline planetary units. PZB series addresses the gaps that both technologies leave for noise-sensitive or space-constrained high-power applications.<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n
    Criterion<\/th>\nPZB Helical \u2605<\/th>\nSpur Planetary (PL\/PF)<\/th>\nParallel-Shaft Helical<\/th>\n\u0426\u0438\u043a\u043b\u043e\u0438\u0434\u0430\u043b\u044c\u043d\u044b\u0439<\/th>\n<\/tr>\n<\/thead>\n
    Noise at 50 kW<\/td>\n\u226468 dB(A)<\/td>\n75\u201385 dB(A)<\/td>\n72\u201380 dB(A)<\/td>\n60\u201368 dB(A)<\/td>\n<\/tr>\n
    Max power (single unit)<\/td>\n50 kW<\/td>\n14 kW (PF)<\/td>\n>100 kW<\/td>\n30\u201390 kW<\/td>\n<\/tr>\n
    Efficiency (full load)<\/td>\n94\u201397%<\/td>\n90\u201396%<\/td>\n94\u201397%<\/td>\n90\u201394%<\/td>\n<\/tr>\n
    Torque density<\/td>\n\u25c9\u25c9\u25c9\u25c9\u25c9<\/td>\n\u25c9\u25c9\u25c9\u25c9\u25c9<\/td>\n\u25c9\u25c9\u25cb\u25cb\u25cb<\/td>\n\u25c9\u25c9\u25c9\u25c9\u25cb<\/td>\n<\/tr>\n
    Backlash (precision)<\/td>\n\u22643 arcmin<\/td>\n6\u201320 arcmin<\/td>\n15\u201330 arcmin<\/td>\n1\u20133 arcmin<\/td>\n<\/tr>\n
    Maintenance<\/td>\nSealed \u2014 none<\/td>\nSealed \u2014 none<\/td>\nOil change 4,000 h<\/td>\nGrease 5,000 h<\/td>\n<\/tr>\n
    High axial load (output)<\/td>\n50,000 N (220PZB)<\/td>\n14,000 N (150PF)<\/td>\nVaries by shaft dia.<\/td>\nModerate<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    \u25c9 = relative level within each row. Cycloidal reducer comparison based on standard industrial models, not precision harmonic drives.<\/p>\n<\/section>\n

    <\/p>\n

    \n

    Where PZB Series Delivers Irreplaceable Value<\/h2>\n
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    Wind Turbine Pitch Drives<\/h3>\n

    Wind turbine rotor blade pitch actuators must combine extreme axial load capacity (blade weight and wind thrust), quiet operation within nacelle acoustic limits, and reliable operation across \u221220\u00b0C to +85\u00b0C ambient temperature ranges. The 220PZB frame’s 50,000 N axial rating<\/strong> handles blade root thrust directly without external bearing housings. Noise \u226468 dB complies with nacelle interior standards. This application drove the dual-support bearing and high axial capacity that defines the PZB structural specification. Pairs naturally with large precision drive shafts<\/a> for extended pitch mechanism arm connections.<\/p>\n<\/div>\n

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    Large-Format Printing & Laminating<\/h3>\n

    Wide-web gravure printing presses and industrial laminating lines drive main impression roll shafts at 15\u201337 kW with strict noise limits imposed by occupational health regulations. PZB 150\u2013180PZB frames meet the \u226475 dB(A) at 1 m requirement without acoustic enclosures, while the \u22645 arcmin two-stage backlash maintains registration accuracy at web speeds exceeding 400 m\/min. Standard spur-planet units require full acoustic enclosure at these power levels \u2014 eliminating the maintenance access that printing operators need during running production.<\/p>\n<\/div>\n

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    Precision Rotary Tables & Indexing<\/h3>\n

    Large CNC rotary tables and precision indexing systems for machining centres require a reducer that combines precision backlash (\u22643 arcmin for C-axis positioning accuracy), high torque for workpiece clamping reaction loads, and vibration-free operation that does not excite table resonance frequencies during light-cut finishing passes. PZB 90\u2013120PZB meets all three simultaneously \u2014 a combination spur-planet planetary cannot achieve at equivalent power. See also our PF series<\/a> for heavy rotary table torque requirements without precision backlash constraints.<\/p>\n<\/div>\n<\/div>\n

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    Application Quick Reference<\/h3>\n