Pinion Stand Mill Drive/Twin drives – Hot Rolling

Large pinion stand mill drive for hot-rolling plant

Friday, August 11, 2017

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Galbiati recently designed a large splitter gearbox for a leading Italian hot rolling mill.

It is a large pinion stand mill drive for a hot-rolling mill that handles steel profiles.

Some technical data:

  • 1000 kW at 1000 rpm;
  • cylinders with an internal diameter of 720 mm;
  • complete with board piping;
  • dedicated control unit for lubrication of bearings and gear train.

Below are photos of the fully mounted splitter gearbox installed at Galbiati’s assembly shop.

Large pinion stand mill drive for hot-rolling sheet steel

Large pinion stand mill drive for hot-rolling sheet steel

Large pinion stand drive for rolling mill

Wednesday, August 26, 2015

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We recently designed a large twin-drive gearbox for a leading Italian rolling mill.

It is a large pinion stand mill drive gearbox five-stand Tandem, weighing 30,000 kg, intended for a rolling mill.

Some technical data:

  • 4×1,100 kW at 1000 rpm – cylinders with an internal diameter of 610 mm

Below are photos of the fully mounted twin-drive gearbox installed at Galbiati’s assembly shop.

Large pinion stand drive for rolling mill

Large pinion stand drive for rolling mill

Large pinion stand drive for rolling mill

Tuesday, July 28, 2015

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We recently designed a large twin-drive gearbox for a leading Italian rolling mill.

It is a large pinion stand mill drive gearbox five-stand Tandem, weighing 40,000 kg, intended for a rolling mill.

Some technical data:

  • 2×1,650 kW at 80 rpm – cylinders with an internal diameter of 610 mm

Below are photos of the fully mounted twin-drive gearbox installed at Galbiati’s assembly shop.

Large pinion stand drive for rolling mill

Large pinion stand drive for rolling mill

Large pinion stand drive for rolling mil

Large pinion stand drive for hot-rolling sheet steel

Monday, July 13, 2015

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Galbiati recently designed a large splitter gearbox for a leading Italian hot rolling mill.

It is a large pinion stand drive for a hot-rolling mill that handles steel profiles.

Some technical data:

  • 1000 kW at 17 rpm – cylinders with an internal diameter of 720 mm

Below are photos of the fully mounted splitter gearbox installed at Galbiati’s assembly shop.

Large pinion stand drive for hot-rolling sheet steel

Large pinion stand drive for hot-rolling sheet steel

Large pinion stand drive for hot-rolling sheet steel

Integrated pinion stand mill drive

Wednesday, June 19, 2013

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Galbiati Group cooperates with major steel plants engineers for the design and construction of large gearboxes for rolling mills.

Galbiati realized a large rolling mill pinion stand drive intended to an important steel plant in Oman.

Integrated pinion stand mill drive for continuous cast aluminum rolling mill hot two-stand Tandem.

Technical Data:

  • 2000 Kw – 13 rpm,  int. 850 mm

Integrated pinion stand mill drive for hot rolling mill

Integrated pinion stand mill drive for hot rolling mill

In the following picture you can see the pinion stand mill drive completely mounted and installed at the end customer rolling mill:

Integrated pinion stand mill drive for hot rolling mill

Hot Rolling Mill pinion stands

Tuesday, June 18, 2013

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Galbiati Group realizes pinion stand mill drives for the most important plant engineers in steel industry.

Galbiati realized a large rolling mill pinion stand main drive intended to an important steel plant in Oman.

Technical Data:

  • 2000 Kw – 30 rpm – int.700 mm

Integrated pinion stand mill drive for hot rolling mill

Integrated pinion stand mill drive for hot rolling mill

In the following picture you can see the pinion stand mill drive completely mounted and installed at the end customer rolling mill:

Integrated pinion stand mill drive for hot rolling mill

Integrated pinion stand mill drive for special alloys

Friday, May 21, 2010

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Galbiati Group design and manufactured a complete integrated pinion stand mill drive for special alloys milling (silica, tungsten, vanadium, etc.) for an Austrian customer. The plant consists of a reversible mill stand driven by an integrated pinion stand mill drive, equipped with two pinions meshing together on a center distance just less than 1 m, running at 50 rpm. The input shaft is connected by a toothed coupling to two motors in series, with a total power of 2.400 kW at 195 rpm. This provides a transmissible torque of approximately 460.000 Nm with a suitable service factor, or a nominal torque that greatly exceeds 1.000.000 Nm.

Integrated gear reducer-pinion stand unit for special alloysIntegrated gear reducer-pinion stand unit for special alloys

Integrated pinion stand mill drive for special alloys

Assembly of the integrated pinion stand mill drive for special alloys.

The basic engineering and the detailed design, such as the nominal torque and minimal center distance between pinions (960 mm) as consequence of the maximum inclination of the spindles between the gear drive and the mill stand rolls, were technical challenges resolved positively thanks to many years experience in high-power mechanical transmission design, modern instruments for structural analysis and, above all, thanks to FEM (Finite Element Method) analysis.

The mill drive consists of reducer high speed pinion – gears set and a double helical carburized and ground output pinion set. The low speed gear wheel, about 2.600 mm approx. diameter, was built using two toothed wheels fitted to the intermediate pinion, each with single helical wheel slightly less than 600 mm facewidth . The intermediate pinion is unique as it reaches a total length of slightly more than 5 meters, with different diameters in the various sections, with a maximum diameter of about 1.000 mm. Manufacturing of the intermediate pinion, requires all of our most modern technology and largest equipment. We even needed to modify the only existing largest carburizing furnace in Italy in order to house, restrain and support such a long part.

Furthermore, due to the high length/diameter ratio, and therefore the consequent bending due to the radial loads, a third hyper-static shaft support was required. This caused the need for very high precision machining of the 2+1 holes to allow the three bearings centers to be on same line.

Once again Galbiati Group solved the problem by machining the entire housing on its high precision CNC boring machine, equipped with a rotating table for loads up to 120 ton. The result is an integrated pinion stand mill drive with an overall weight of more than 170 ton: electrowelded, high rigidity, steel housing; carburized and high-quality ground gears and pinions; radial and thrust bearings, primary brands; forced feed lubrication system piping and fittings mounted on drive.

At the end of July 2008 the drive was successfully tested at Galbiati Group workshop in the presence of the customer and the end-user, both of who were fully satisfied. Equipment like the drive described above has made Galbiati Group the benchmark supplier on the European and World markets for the design and manufacture of cutting-edge metallurgical and mechanical engineering products. In a stagnant period for industrial investments, such as we are now experiencing, Galbiati Group pays as much attention as possible to innovation and high-tech production which have become the only solution for global competition.

Integrated pinion stand mill drive

Thursday, May 20, 2010

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Integrated pinion stand mill drive for continuous cast aluminum rolling mill hot three-stand Tandem.

3.100 kW – 13.9 rpm/3.100 kW – 33,6 rpm/3.100 – 62.8 rpm

Pinion stands

Twin Drive for hot aluminum mill

Wednesday, May 19, 2010

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Hot aluminum roughing mill. Twin drive .

2 x 3.600 kW – 30 rpm – 1.300 mm Roll center distance

Twin drive hot aluminum rough-casting mill. 2 x 3,600 kW –

Twin drive reversible hot mill

Sunday, May 16, 2010

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Reversible hot mill Twin drive.

4.000 kW – 80 rpm – 960 mm Roll center distance

Twin drive reversible hot mill 4,000 kW – 80 rpm –

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Galbiati Group - Engineering & Machining

23848 Oggiono (Lc) Via Cà Bianca Pascolo, 26 Italy | Fax +39 341.2633300 | s.origgi@galbiatigroup.it
P.Iva: 03301540963 | Capitale sociale: 500.000 euro | REA: MI-1665349
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