{"id":2423,"date":"2026-01-22T02:41:30","date_gmt":"2026-01-22T02:41:30","guid":{"rendered":"https:\/\/www.pto-drive-shafts.com\/?p=2423"},"modified":"2026-01-22T06:51:56","modified_gmt":"2026-01-22T06:51:56","slug":"ultra-high-torque-cardan-shafts-for-reversing-rolling-mills-exceeding-din-15450-standards","status":"publish","type":"post","link":"https:\/\/www.pto-drive-shafts.com\/de\/application\/ultra-high-torque-cardan-shafts-for-reversing-rolling-mills-exceeding-din-15450-standards\/","title":{"rendered":"Kardanwellen mit extrem hohem Drehmoment f\u00fcr reversierende Walzwerke: \u00dcbertreffen die Anforderungen der DIN 15450"},"content":{"rendered":"

\"Kardon-Schaft\"<\/p>\n

In the high-risk environment of German steel production\u2014from the blast furnaces in Duisburg to the precision rolling mills in Baden-W\u00fcrttemberg\u2014component failures are not merely inconveniences, but a carefully orchestrated economic disaster. When a 25-ton billet strikes the rolls, the impact load transmitted to the drive system far exceeds the values \u200b\u200bin standard product catalogs. This page details engineered universal joint shafts (Cardan shafts) designed specifically for the harsh 24\/7 operating environment of metallurgical processing.<\/p>\n

We don’t just supply shafts; we redesign torque transmission paths. Our SWC-BH and SWP-H series are calibrated to withstand the heat radiation of 1200\u00b0C billets and the “biting” impact of reverse stands, ensuring your mill load factor (K) remains within safe operating ranges.<\/p>\n

Technical Specifications: The SWC-BH Heavy Duty Series<\/h2>\n

Engineers comparing specifications for retrofit or new OEM designs must look beyond nominal torque. The fatigue limit under reversing loads is the true determinant of service life. Below are the verified parameters for our 390mm\u2013620mm flange diameter series, commonly utilized in roughing and finishing stands.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameterbeschreibung<\/th>\nWert \/ Standard<\/th>\nEngineering Tolerance\/Notes<\/th>\n<\/tr>\n<\/thead>\n
Nenndrehmoment (Tn)<\/td>\n180 kNm – 1,250 kNm<\/td>\nService Factor K=1.0<\/td>\n<\/tr>\n
Erm\u00fcdungsdrehmoment (Tdw)<\/td>\n110 kNm – 780 kNm<\/td>\nCalculated at 10^7 cycles (Reversing)<\/td>\n<\/tr>\n
Max Swing Diameter (D)<\/td>\n390mm, 440mm, 490mm, 550mm, 620mm<\/td>\nDIN Flange Compatible<\/td>\n<\/tr>\n
Maximaler Gelenkwinkel<\/td>\n15\u00b0 (Short Duration) \/ 5\u00b0 (Continuous)<\/td>\nAbh\u00e4ngig von der Drehzahl<\/td>\n<\/tr>\n
Spline Connection<\/td>\nEvolventenverzahnung DIN 5480<\/td>\nGeh\u00e4rtet und angelassen<\/td>\n<\/tr>\n
Flanschschnittstelle<\/td>\nHirth Serration \/ Face Key \/ Cross Key<\/td>\nHigh Friction Grip Required<\/td>\n<\/tr>\n
Cross Trunnion Material<\/td>\n18CrNiMo7-6 (einsatzgeh\u00e4rtet)<\/td>\nCore Hardness 30-35 HRC, Case 60-62 HRC<\/td>\n<\/tr>\n
Jochmaterial<\/td>\n42CrMo4V (geschmiedet)<\/td>\nUltrasonic Tested (Class 3)<\/td>\n<\/tr>\n
Rohrmaterial<\/td>\nSt52.3 \/ 34CrMo4 Seamless<\/td>\nWall thickness > 15mm<\/td>\n<\/tr>\n
Dynamische Auswuchtung<\/td>\nG6.3 \/ G2.5 (ISO 1940-1)<\/td>\nAt operational RPM<\/td>\n<\/tr>\n
Lagerlebensdauer (L10h)<\/td>\n> 25.000 Stunden<\/td>\nUnder rated load spectrum<\/td>\n<\/tr>\n
Schmiersystem<\/td>\nCentralized Auto-Lube \/ High-Temp Lithium<\/td>\nAccess ports on spider<\/td>\n<\/tr>\n
Betriebstemperatur<\/td>\n-20 \u00b0C bis +250 \u00b0C<\/td>\nWith Viton\/FKM Seals<\/td>\n<\/tr>\n
Teleskophub<\/td>\n80 mm \u2013 450 mm<\/td>\nSpline protection bellows included<\/td>\n<\/tr>\n
Torsionssteifigkeit<\/td>\n1.25 x 10^6 Nm\/rad – 8.5 x 10^6 Nm\/rad<\/td>\nVaries by length<\/td>\n<\/tr>\n
Kritische Drehzahl (nc)<\/td>\n1200 RPM – 3500 RPM<\/td>\nL\u00e4ngenabh\u00e4ngig<\/td>\n<\/tr>\n
Lackierung\/Beschichtung<\/td>\nRAL 1004 (Safety Yellow) \/ Epoxy<\/td>\nSalt spray resistance > 500h<\/td>\n<\/tr>\n
Zertifizierungen<\/td>\nDIN EN 10204-3.1, ISO 9001:2015<\/td>\nMaterial Traceability<\/td>\n<\/tr>\n
Inspektion<\/td>\nMPI (Magnetic Particle), UT (Ultrasonic)<\/td>\n100% on critical welds<\/td>\n<\/tr>\n
Emergency Overload<\/td>\n2.5 x Nominal Torque<\/td>\nPlastic deformation limit<\/td>\n<\/tr>\n
Axialkraftkapazit\u00e4t<\/td>\n15% of Nominal Torque<\/td>\nInternal spline friction friction<\/td>\n<\/tr>\n
Assembly Weight<\/td>\n450 kg – 3,800 kg<\/td>\nWithout packaging<\/td>\n<\/tr>\n
Wartungsintervall<\/td>\n500 – 1000 Hours<\/td>\nRegreasing cycle<\/td>\n<\/tr>\n
Ger\u00e4uschpegel<\/td>\n< 85 dB(A)<\/td>\nAt 1m distance<\/td>\n<\/tr>\n
Country of Origin<\/td>\nManufacturing: EVER-POWER China<\/td>\nEngineered for German Standards<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
Field Note from Chief Engineer Weber:<\/strong>
\n“In our analysis of failures in the Saarland region, 65% of premature driveshaft failures were not due to torque overload, but improper spline lubrication maintenance. We have redesigned our slip assemblies with a patented ‘internal reservoir’ system that retains grease even under the high centrifugal forces of modern high-speed wire rod mills. Do not ignore the L10h bearing life calculation when sizing; a shaft that fits geometrically may not survive the duty cycle.”<\/div>\n

Metallurgical Integrity: Why Material Choice Matters<\/h2>\n

The core of a Cardan shaft’s resilience lies in its heat treatment. For the German market, where standards like DIN are non-negotiable, we utilize a dual-material strategy.<\/p>\n

The Yoke Construction: 42CrMo4V<\/h3>\n

Unlike standard commercial shafts using cast steel, our industrial yokes are drop-forged from 42CrMo4V (AISI 4140 equivalent). The forging process aligns the grain structure of the steel with the contours of the yoke ear, significantly increasing resistance to crack propagation.
\nYield Strength (Rp0.2): > 750 MPa
\nImpact Energy (KV): > 35J at -20\u00b0C (Crucial for unheated winter startups in outdoor gantry crane applications).<\/p>\n

The Cross Assembly: Case Hardening<\/h3>\n

The spider (cross) is the pivot point of power. We employ 18CrNiMo7-6, a case-hardening steel.
\nSurface: Carburized to 58-62 HRC to resist needle bearing wear.
\nCore: Toughened to 30-35 HRC to absorb shock loads without snapping.
\nThis differential hardness is critical. A through-hardened cross would shatter under the impact of a “cobble” event in a rolling mill.<\/p>\n

Adhering to German Safety & Operational Standards<\/h2>\n

Operating heavy rotation machinery in Germany requires strict adherence to the Machinery Directive 2006\/42\/EC. Our shafts are supplied with full documentation to support your CE marking process.<\/p>\n

Regional Compliance Checklist<\/h3>\n

Nordrhein-Westfalen (NRW) Industrial Zones: For plants operating near residential areas (e.g., Essen, Dortmund), our silent-running precision splines help meet noise emission regulations (TA L\u00e4rm).
\nBavaria (Bayern) Automotive Supply Chain: For precision forging lines supplying BMW or Audi, our shafts meet the G2.5 balance grade required to prevent vibration marks on forged parts.
\nSafety Guards: All rotating shafts must be guarded. We supply interlocking safety guards compatible with UVV (Accident Prevention Regulations) requirements mandated by the Berufsgenossenschaften (German Employers’ Liability Insurance Associations).<\/p>\n

Retrofitting & Compatibility Guide<\/h2>\n

Many German mills run on legacy equipment initially fitted with shafts from domestic heavyweights. Our engineering team has developed specific retrofit protocols to ensure seamless interchangeability without modifying your gearbox or roll-neck interfaces.<\/p>\n

We provide drop-in replacements compatible with the flange patterns and torque ratings of the following series:<\/p>\n