{"id":881,"date":"2026-06-17T06:38:13","date_gmt":"2026-06-17T06:38:13","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=881"},"modified":"2026-06-17T06:38:14","modified_gmt":"2026-06-17T06:38:14","slug":"zr45-slewing-drive-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/nl\/product\/zr45-slewing-drive-planetary-gearbox\/","title":{"rendered":"ZR45 Slewing Drive Planetary Gearbox \u2014 Right-Angle Bevel-Planetary, 3-5 Stage"},"content":{"rendered":"
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EP-ZR45 \u2014 The Flagship Slewing Drive for Heavy-Lift Machinery<\/h2>\n
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De EP-ZR45<\/strong> is the largest frame in the ZR slewing drive series<\/a>. Where the mid-range ZR06-ZR10 models serve general construction cranes and excavators, the ZR45 targets the machinery that moves the heaviest loads on earth: ship-to-shore gantry cranes handling 40-foot containers at 30+ cycles per hour, mining excavators with bucket payloads exceeding 15 cubic metres, offshore derrick cranes rated for 1,000-tonne lifts, and steel mill ladle turrets rotating 300-tonne molten metal vessels.<\/p>\n

At 42,500 Nm continuous and 110,500 Nm peak, the ZR45 produces torque levels that exceed the headline specification (40,500 Nm) published for the series by 5%. This margin exists because the 3-5 stage configurations use the largest available bevel input pair (R16\/R10\/R06 sub-variants), providing greater tooth contact area than the 2-stage variants of smaller frames.<\/p>\n<\/div>\n

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42,500<\/div>\n
Continu koppel (Nm)<\/div>\n<\/div>\n
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110,500<\/div>\n
Peak Torque (Nm)<\/div>\n<\/div>\n
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IP67<\/div>\n
Sealed<\/div>\n<\/div>\n
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3-5<\/div>\n
Fasen<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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ZR45 Technical Parameters \u2014 3 Precision-Matched Ratio Configurations<\/h2>\n

Unlike smaller ZR frames that offer dozens of ratio options, the ZR45 concentrates on three optimised reduction points \u2014 one per stage count \u2014 each engineered for a specific speed class of heavy-lift slewing. All three deliver the same 42,500 Nm continuous \/ 110,500 Nm peak torque at the output. The engineering trade-off between them is thermal power capacity versus ratio.<\/p>\n

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Configuratie<\/th>\nVerhouding<\/th>\nCont. Torque (Nm)<\/th>\nMax. Torque (Nm)<\/th>\nn1 Max (RPM)<\/th>\nPt F \/ M (kW)<\/th>\n<\/tr>\n<\/thead>\n
ZR45**3 \/ R16<\/td>\n14.19<\/td>\n42,500<\/td>\n110,500<\/td>\n2,500<\/td>\n26.5 \/ 38.0<\/td>\n<\/tr>\n
ZR45**4 \/ R10<\/td>\n43.43<\/td>\n42,500<\/td>\n110,500<\/td>\n2,500<\/td>\n11.5 \/ 13.5<\/td>\n<\/tr>\n
ZR45**5 \/ R06<\/td>\n109.70<\/td>\n42,500<\/td>\n110,500<\/td>\n2,500<\/td>\n9.5 \/ 12.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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3-Stage \/ R16 \u2014 i=14.19<\/strong><\/p>\n

Highest thermal capacity (26.5-38.0 kW). For high-duty-cycle applications: excavator upper-structure rotation, STS crane slewing with frequent start-stop reversals. Output speed up to 176 rpm at full motor speed.<\/p>\n<\/div>\n

4-Stage \/ R10 \u2014 i=43.43<\/strong><\/p>\n

Balanced thermal and ratio. For medium-speed crane slewing: port mobile cranes, offshore pedestal cranes, large piling rigs. Output speed up to 57 rpm. The most commonly specified ZR45 variant.<\/p>\n<\/div>\n

5-Stage \/ R06 \u2014 i=109.70<\/strong><\/p>\n

Maximum reduction for creep-speed positioning: ship-unloader boom slewing, steel mill ladle turret rotation, offshore drilling platform turntable. Output speed up to 23 rpm. Lowest thermal capacity \u2014 suitable for intermittent or low-speed continuous duty.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Dual-Drive Configuration \u2014 Doubling Capacity or Adding Redundancy<\/h2>\n
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At the 42,500 Nm torque class, many applications \u2014 particularly STS container cranes, large mining excavators, and offshore heavy-lift cranes \u2014 require either double the torque capacity of a single drive, or redundancy that allows the machine to continue operating safely if one drive fails. The ZR45 is specifically designed for dual-drive mounting, where two units engage the same slewing ring from diametrically opposed positions.<\/p>\n

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Torque-Doubling Mode<\/strong><\/p>\n

Two ZR45 units at ratio 43.43 deliver a combined 85,000 Nm continuous \/ 221,000 Nm peak to the slewing ring. Both motors run at equal speed and equal hydraulic flow. The slewing ring pinion module and tooth count must be identical on both units, and the mounting geometry must position the pinions 180 degrees apart on the ring gear for balanced load distribution.<\/p>\n<\/div>\n

Active Redundancy Mode<\/strong><\/p>\n

Both units share the slewing load equally during normal operation, but the machine can complete its working cycle on a single drive if one unit is taken offline for maintenance. The hydraulic or electrical control system must include a load-sensing circuit that detects unequal motor pressure or current and adjusts flow or frequency to prevent the healthy drive from overloading during single-drive operation.<\/p>\n<\/div>\n

Mounting Geometry Requirement<\/strong><\/p>\n

Both ZR45 units must use the same gear ratio and the same output pinion specification. The slewing ring manufacturer must verify that the ring gear tooth profile and hardness are rated for the combined mesh force of two pinions. Contact our engineering team for a dual-drive dimensional layout drawing and pinion-to-ring load calculation specific to your slewing ring supplier.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\"Planetary<\/p>\n
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ZR45 at a Glance<\/h3>\n