{"id":875,"date":"2026-06-17T06:17:33","date_gmt":"2026-06-17T06:17:33","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=875"},"modified":"2026-06-17T06:17:33","modified_gmt":"2026-06-17T06:17:33","slug":"zr19-slewing-drive-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/th\/product\/zr19-slewing-drive-planetary-gearbox\/","title":{"rendered":"ZR19 Slewing Drive Planetary Gearbox \u2014 Right-Angle Bevel-Planetary, 2-5 Stage"},"content":{"rendered":"
\n

<\/p>\n

\n

EP-ZR19 \u2014 25% Above Headline Torque, 47 Ratios Across 4 Stage Counts<\/h2>\n
\n
\n

\u0e40\u0e14\u0e2d\u0e30 EP-ZR19 slewing drive planetary gearbox<\/strong>\u00a0occupies a unique position in the ZR slewing drive series<\/a>: its specification table shows 20,600 Nm continuous output torque and 45,000 Nm peak \u2014 25% and 7% higher than the published headline figures of 16,500 Nm and 42,000 Nm respectively. This margin exists because the ZR19 internal bevel input pair (R16, R10, R06 sub-variants) is sized conservatively for this frame, delivering actual performance that comfortably exceeds the catalogue promise.<\/p>\n

With 47 discrete gear ratios across 2-stage through 5-stage configurations, the ZR19 covers a ratio range from 13.29 to 1,808. Only two torque tiers exist (20,600 Nm and 17,200 Nm), compared to the three-tier de-rating structure of the adjacent ZR16 \u2014 meaning a higher proportion of the ZR19 ratio table delivers full-rated torque.<\/p>\n

\n
\n
20,600<\/div>\n
Max Cont. Nm<\/div>\n<\/div>\n
\n
45,000<\/div>\n
Peak Nm<\/div>\n<\/div>\n
\n
47<\/div>\n
\u0e2d\u0e31\u0e15\u0e23\u0e32\u0e2a\u0e48\u0e27\u0e19<\/div>\n<\/div>\n
\n
2-5<\/div>\n
\u0e40\u0e27\u0e17\u0e35<\/div>\n<\/div>\n<\/div>\n
IP67 Sealed<\/span>
\nDIN 5-6<\/span>
\n-40 to +80 deg C<\/span>
\n2,500 RPM Max<\/span><\/div>\n<\/div>\n
\"ZR19<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

ZR19 Technical Parameters \u2014 47 Ratio Configurations<\/h2>\n

Continuous torque at N2 x h = 100,000 hours. The ZR19 uses a simplified two-tier torque structure: 20,600 Nm at lower ratios, de-rating to 17,200 Nm at higher ratios within each stage count. All configurations share 2,500 rpm maximum input speed. Type codes include R16, R10, or R06 bevel sub-variant suffixes.<\/p>\n

2-Stage \u2014 ZR19**2 \/ R16 (2 Ratios)<\/h3>\n
\n\n\n\n\n\n\n
\u0e2d\u0e31\u0e15\u0e23\u0e32\u0e2a\u0e48\u0e27\u0e19<\/th>\nCont. Torque (Nm)<\/th>\nMax. Torque (Nm)<\/th>\nMax RPM<\/th>\nPt F\/M (kW)<\/th>\n<\/tr>\n<\/thead>\n
13.29<\/td>\n20,600<\/td>\n45,000<\/td>\n2,500<\/td>\n18.5 \/ 24.5<\/td>\n<\/tr>\n
18.22<\/td>\n17,200<\/td>\n38,500<\/td>\n2,500<\/td>\n18.5 \/ 24.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

3-Stage \u2014 ZR19**3 \/ R10 (7 Ratios)<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n
\u0e2d\u0e31\u0e15\u0e23\u0e32\u0e2a\u0e48\u0e27\u0e19<\/th>\nCont. Torque (Nm)<\/th>\nMax. Torque (Nm)<\/th>\nMax RPM<\/th>\nPt F\/M (kW)<\/th>\n<\/tr>\n<\/thead>\n
43.43<\/td>\n20,600<\/td>\n45,000<\/td>\n2,500<\/td>\n11.5 \/ 13.5<\/td>\n<\/tr>\n
51.27<\/td>\n20,600<\/td>\n45,000<\/td>\n2,500<\/td>\n11.5 \/ 13.5<\/td>\n<\/tr>\n
64.30<\/td>\n20,600<\/td>\n45,000<\/td>\n2,500<\/td>\n11.5 \/ 13.5<\/td>\n<\/tr>\n
70.28<\/td>\n20,600<\/td>\n45,000<\/td>\n2,500<\/td>\n11.5 \/ 13.5<\/td>\n<\/tr>\n
88.15<\/td>\n17,200<\/td>\n38,500<\/td>\n2,500<\/td>\n11.5 \/ 13.5<\/td>\n<\/tr>\n
102.53<\/td>\n17,200<\/td>\n38,500<\/td>\n2,500<\/td>\n11.5 \/ 13.5<\/td>\n<\/tr>\n
124.03<\/td>\n17,200<\/td>\n38,500<\/td>\n2,500<\/td>\n11.5 \/ 13.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

4-Stage \u2014 ZR19**4 \/ R06 (16 Ratios)<\/h3>\n
\n\n\n\n\n\n\n
Ratio Range<\/th>\nCount<\/th>\nCont. Torque (Nm)<\/th>\nMax. Torque (Nm)<\/th>\nPt F\/M (kW)<\/th>\n<\/tr>\n<\/thead>\n
109.70 \u2013 279.71<\/td>\n10<\/td>\n20,600<\/td>\n45,000<\/td>\n9.5 \/ 12.5<\/td>\n<\/tr>\n
305.73 \u2013 539.52<\/td>\n6<\/td>\n17,200<\/td>\n38,500<\/td>\n9.5 \/ 12.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

5-Stage \u2014 ZR19**5 \/ R06 (22 Ratios)<\/h3>\n
\n\n\n\n\n\n\n
Ratio Range<\/th>\nCount<\/th>\nCont. Torque (Nm)<\/th>\nMax. Torque (Nm)<\/th>\nPt F\/M (kW)<\/th>\n<\/tr>\n<\/thead>\n
381.75 \u2013 1,441.42<\/td>\n18<\/td>\n20,600<\/td>\n45,000<\/td>\n8.0 \/ 11.5<\/td>\n<\/tr>\n
1,516.50 \u2013 1,807.55<\/td>\n4<\/td>\n17,200<\/td>\n38,500<\/td>\n8.0 \/ 11.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Full per-ratio data sheets for 4-stage and 5-stage tables available on request. 82% of all ZR19 ratios (39 of 47) deliver the full 20,600 Nm continuous torque without de-rating.<\/p>\n<\/section>\n

<\/p>\n

\n

Vibration Monitoring \u2014 Catching Problems Before They Become Failures<\/h2>\n

At the 20,600 Nm torque class, unplanned downtime is expensive \u2014 a failed slewing drive on a wind turbine or tunnel boring machine can halt an entire project for weeks. Vibration-based condition monitoring transforms the ZR19 from a replace-on-failure component into a predictively managed asset.<\/p>\n

\n
\n
\n
\n
\n
1<\/div>\n
<\/div>\n<\/div>\n
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Sensor Placement<\/h3>\n

Mount a triaxial accelerometer on the ZR19 housing near the output bearing (the highest-load bearing in the assembly). A second sensor on the input bevel stage housing captures the bevel mesh signature. Use ICP-type sensors with a frequency range of 0.5-10 kHz and minimum sensitivity of 100 mV\/g. Magnetic mounting pads are acceptable for periodic spot checks; permanent stud-mounting is required for continuous online monitoring.<\/p>\n<\/div>\n<\/div>\n

\n
\n
2<\/div>\n
<\/div>\n<\/div>\n
\n

Baseline Measurement<\/h3>\n

Record a vibration baseline within the first 100 operating hours at the most common operating speed and load. The baseline captures the normal gear mesh frequency signature, bearing pass frequencies, and structural resonances of the installation. All future measurements are compared against this baseline. Without a baseline, it is impossible to distinguish normal vibration from developing faults.<\/p>\n<\/div>\n<\/div>\n

\n
\n
3<\/div>\n<\/div>\n
\n

Alarm Thresholds and Trending<\/h3>\n

Set the alert threshold at 2x baseline velocity (mm\/s RMS). Set the alarm threshold at 4x baseline. A gradual increase in vibration amplitude at a specific frequency over weeks or months indicates wear progression \u2014 schedule an inspection at the next planned maintenance window. A sudden step-change indicates an acute event (tooth fracture, bearing cage failure) \u2014 shut down and inspect immediately. Trend overall velocity, gear mesh amplitude, and bearing defect frequencies separately.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

\n

\"Korea<\/p>\n

Combined Monitoring:<\/strong> For maximum predictive accuracy, combine vibration monitoring with oil analysis trending (particle count every 2,000 hours). A vibration spike accompanied by a simultaneous increase in iron particles provides high-confidence diagnosis of gear tooth damage.<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Where the ZR19 Fits \u2014 Applications in the 17,000-20,600 Nm Range<\/h2>\n

\"Heavy-duty<\/p>\n

\n
\n

Wind Turbine Yaw Systems (1-3 MW Class)<\/h3>\n

Megawatt-class wind turbines with rotor diameters of 60-100 metres require nacelle yaw torques of 12,000-20,000 Nm per drive unit. The ZR19 3-stage at ratios 43:1-70:1 provides the torque-speed combination these yaw mechanisms demand, with the 45,000 Nm peak rating absorbing storm-load transients. Typical MW-class yaw systems use 4-8 ZR19 units equally spaced around the tower-top yaw bearing, each driven by a 7.5-15 kW electric motor through a VFD.<\/p>\n<\/div>\n

\n

Tunnel Boring Machine Auxiliary Drives<\/h3>\n

TBM segment erector rotation, thrust cylinder ring positioning, and shield articulation mechanisms generate sustained slewing torques in the 15,000-20,000 Nm range under extremely confined and wet conditions. The ZR19 4-stage at ratios 110:1-280:1 provides the controlled low-speed rotation these mechanisms require, while the IP67 sealed housing resists the groundwater, bentonite slurry, and aggregate abrasion present inside the TBM shield.<\/p>\n<\/div>\n

\n

Heavy Industrial Positioners and Rotary Kilns<\/h3>\n

Large-diameter rotary kiln support rollers, cement plant clinker cooler rotation drives, and heavy welding positioners for pressure vessel fabrication<\/a> require sustained high torque at very low output speeds (0.1-5 rpm). The ZR19 5-stage at ratios 382:1-1,808:1 covers this speed range directly from a standard 4-pole IEC motor without any external reduction stage, simplifying the drive package and reducing the number of potential failure points.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Transportation, Storage and Long-Term Preservation<\/h2>\n

The ZR19 weighs approximately 180-250 kg depending on configuration and brake option. Proper handling, storage, and preservation practices protect the precision gear surfaces, seals, and coatings between delivery and installation \u2014 which can span months on large infrastructure projects.<\/p>\n

\n
\n

Handling and Lifting<\/strong><\/p>\n

Use the cast lifting eye-bolts only. Never lift by the output shaft, input shaft, or brake housing. Minimum lifting capacity 400 kg (1.5x safety factor). Secure the unit horizontally during crane transport to prevent the output shaft from acting as a pendulum that could damage the output seal. Use nylon slings or padded chains to avoid scratching the housing coating.<\/p>\n<\/div>\n

\n

Short-Term Storage (Under 6 Months)<\/strong><\/p>\n

Store indoors in a dry, ventilated area. Leave the factory oil fill in place \u2014 it provides corrosion protection for the internal gear and bearing surfaces. Cover the input and output shaft openings with the factory-fitted protective caps. Do not remove these caps until the moment of motor or pinion installation. Rotate the input shaft by hand 10 turns every 30 days to redistribute the oil film on bearing surfaces.<\/p>\n<\/div>\n

\n

Long-Term Storage (6-24 Months)<\/strong><\/p>\n

Apply VCI (Volatile Corrosion Inhibitor) spray to all exposed machined surfaces (shaft ends, flange faces, bolt holes). Seal the breather valve port with a VCI-treated plug. Wrap the entire unit in VCI barrier paper or film. Store on a wooden pallet in a temperature-controlled warehouse (5-40 deg C, under 70% relative humidity). Perform the 30-day shaft rotation even during long-term storage.<\/p>\n<\/div>\n

\n

Pre-Installation Inspection<\/strong><\/p>\n

Before mounting, verify: oil level is at the correct mark, no visible seal damage or oil weep, shaft rotates freely by hand without grinding or catching, breather valve is clear, and mounting flange surface is free of rust or impact damage. If the unit has been stored for more than 12 months, drain and refill the oil before commissioning. Contact our engineering team<\/a> for guidance on units stored beyond 24 months.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Related Products<\/h2>\n
\n
\n

\"SE406BT3<\/p>\n

\n

Track Drive Planetary Gearboxes \u2192<\/a><\/h3>\n

EP-SE series for TBM segment transport crawlers, heavy mobile crane undercarriages, and drilling rig track propulsion systems.<\/p>\n<\/div>\n<\/div>\n

\n

\"EP-ZDWE<\/p>\n

\n

High-Precision Planetary Gearboxes \u2192<\/a><\/h3>\n

EP-ZDWE right-angle series for wind turbine pitch control drives, TBM cutter-head positioning, and rotary kiln drive servo auxiliaries.<\/p>\n<\/div>\n<\/div>\n

\n

\"Industrial<\/p>\n

\n

Agricultural Gearboxes \u2192<\/a><\/h3>\n

Right-angle bevel stages for kiln auxiliary drives, cement plant conveyor systems, and heavy industrial material handling installations.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

\u0e04\u0e33\u0e16\u0e32\u0e21\u0e17\u0e35\u0e48\u0e1e\u0e1a\u0e1a\u0e48\u0e2d\u0e22<\/h2>\n
\n
\n

How does the ZR19 compare to the ZR24 for the same application?<\/h3>\n

The ZR19 (20,600 Nm actual) and ZR24 (25,000 Nm actual) overlap in the 17,000-20,600 Nm torque range. The ZR19 offers 47 ratios with a maximum of 1,808:1, while the ZR24 provides 24 ratios reaching 4,347:1. If your required ratio is below 1,808, the ZR19 likely provides a closer match with a more compact frame. If ultra-high ratios above 1,808 are needed, the ZR24 is the only option. For torque requirements above 20,600 Nm continuous, the ZR24 is required regardless of ratio.<\/p>\n<\/div>\n

\n

How many ZR19 units are needed for a 2 MW wind turbine yaw system?<\/h3>\n

A 2 MW turbine with an 80-90 metre rotor diameter typically requires a total nacelle yaw torque of 80,000-120,000 Nm (including storm load safety factor). At 20,600 Nm per unit, this requires 4-6 ZR19 drives equally spaced around the yaw bearing. The exact number depends on the turbine manufacturer specified safety factor, the site wind class (IEC I, II, or III), and whether the yaw system must meet storm endurance without the yaw brake. Provide the turbine model and site wind data for a verified recommendation.<\/p>\n<\/div>\n

\n

Why is the ZR19 limited to 2,500 rpm instead of 3,500 rpm like the smaller models?<\/h3>\n

The ZR19 bevel input stage uses larger-diameter bevel gears than the ZR01-ZR16 to achieve the higher torque capacity. Larger gear diameters mean higher peripheral speed at the tooth mesh. The 2,500 rpm limit ensures the bevel tooth peripheral speed stays within the design threshold for acceptable noise, heat generation, and bearing load at the bevel stage. In practice, most ZR19 applications use 4-pole motors at 1,450-1,800 rpm, well below the 2,500 rpm limit.<\/p>\n<\/div>\n

\n

Can the ZR19 be used inside a tunnel boring machine where temperatures exceed 40 deg C?<\/h3>\n

Yes. The standard operating range is -40 to +80 deg C ambient. TBM shield interiors typically reach 35-55 deg C. At sustained ambient above 40 deg C, de-rate the thermal power (Pt) by 2% per degree. For a ZR19**4 at 50 deg C ambient, the effective Pt(M) becomes approximately 10.0 kW (versus 12.5 kW at 40 deg C). Verify that the motor input power at your duty cycle does not exceed this adjusted value. If it does, specify the fan-cooled shroud option or increase the stage count (lower Pt but constant torque).<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Customer Feedback<\/h2>\n
\n
\n
\n
\u0e41\u0e2d\u0e25<\/div>\n
\n
Lars E. \u2014 Wind Turbine O&M Manager<\/div>\n
Verified Purchase \u00b7 Jutland, Denmark \u00b7 Feb 2026<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We maintain 22 turbines across two wind farms and have been replacing yaw drives with ZR19**3 units over the past 18 months. The retrofit is straightforward \u2014 the mounting interface matches the OEM bolt pattern with a standard adapter ring. Performance at -22 deg C winter operation has been reliable with the VG 150 oil specification. We installed vibration sensors on the first four replacements per the manual and so far the trending data looks stable. The biggest practical benefit is having one part number for all 22 turbines instead of the three different OEM models we were previously stocking.<\/p>\n<\/div>\n

\n
\n
\u0e0b\u0e35<\/div>\n
\n
Chen Y. \u2014 TBM Project Manager<\/div>\n
Verified Purchase<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

Segment erector drive on a metro tunnel project. The unit operated inside the TBM shield for 14 months at approximately 45 deg C average ambient. We performed the oil analysis at every oil change and the particle counts stayed within normal limits throughout. The IP67 seal has held up in an environment where everything gets coated in bentonite slurry within days. No complaints.<\/p>\n<\/div>\n

\n
\n
I<\/div>\n
\n
Ivan P. \u2014 Cement Plant Engineer<\/div>\n
Verified Purchase \u00b7 April 2026<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2606<\/div>\n<\/div>\n

Rotary kiln support roller drive, ZR19**5 at 973.56 ratio. The drive replaced a chain-and-sprocket arrangement that required re-tensioning every two weeks in the kiln house dust environment. The ZR19 has been running for 10 months maintenance-free other than the scheduled oil change. One observation: we received the unit with the breather valve assembled but not the VCI storage caps, so the exposed shaft ends had light surface oxidation after sitting in our warehouse for three months before installation. It cleaned up without issue but better packaging for long storage would be an improvement.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"

The EP-ZR19 slewing drive planetary gearbox delivers 20,600 Nm continuous output torque \u2014 25% above the series headline of 16,500 Nm \u2014 with 45,000 Nm peak capacity across 47 gear ratios spanning 2-stage through 5-stage planetary reductions (13.29 to 1,808). Positioned between the ZR16 (13,580 Nm) and the ZR24 (21,000 Nm), the ZR19 serves megawatt-class wind turbine yaw systems, tunnel boring machine auxiliary drives, heavy industrial turntable positioners, and large rotary kiln support mechanisms. IP67 FKM sealed, DIN 5-6 ground, QT600-3 ductile iron housing rated from -40 to +80 deg C.<\/div>","protected":false},"featured_media":876,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[967],"product_tag":[],"class_list":["post-875","product","type-product","status-publish","has-post-thumbnail","product_cat-slewing-drive-planetary-gearbox","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/planetary-gearboxes.com\/th\/wp-json\/wp\/v2\/product\/875","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/th\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/th\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/th\/wp-json\/wp\/v2\/comments?post=875"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/th\/wp-json\/wp\/v2\/media\/876"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/th\/wp-json\/wp\/v2\/media?parent=875"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/th\/wp-json\/wp\/v2\/product_brand?post=875"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/th\/wp-json\/wp\/v2\/product_cat?post=875"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/th\/wp-json\/wp\/v2\/product_tag?post=875"}],"curies":[{"name":"\u0e14\u0e31\u0e1a\u0e40\u0e1a\u0e34\u0e25\u0e22\u0e39\u0e1e\u0e35","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}