Model D3500/Z1 Mill Gear Drive and Model D3500/Z2 Mill Gear Drive

Original manufacturer	GDW, SKET
Used for	Used for 2.6 m dia. x 13 m mills; Model D3500 gear drive unit with twin gears Model D3500/Z1 + Model D3500/Z1 twin gears
Rating / Motor rating	810 kW (surge power 1,620 kW)
Design factor / Factor KA	1.6 as per design method to TGL 10545, 10546
Driving speed	975 rpm
Transmission ratio	A1: 49.04 A2: 47.31
Bearings fitted	Plain journal bearings
Weight of gear drive unit	approx. 48,500 kg
Rehabilitation capability of the original gear drive	New gears of converted configuration; welded helical gears. Replacement of antifriction gears

Replacement

Newly developed Vakoma gear drive with hardened and ground teeth. Designed to DIN 3990 for factor K_A = 2.0

Note
Vakoma Gear drive for potential replacement in project engineering. Foundation needs to be modified. An advanced auxiliary drive with a jaw clutch having a positioning mechanism could be supplied. A membrane clutch for connection to the mill could be accommodated in the design.

D3500 Z1 Helical gear unit Original drawingDownload PDF-file

Model D3500/Z1 Gears and Model D3500/Z2

Original manufacturer	GDW, SKET
Used for	Spare parts for gear with D3500 on the pinion shaft of the 2nd stage screwed spur gears of the 1st Stage (gear doubleobliquely) passed on. The 2nd stage was Sunderlandverzahnung.
Rating / Motor rating	800 kW ( surge power 1,600 kW)
Design factor / Factor KA	1.6 through 1.8 as per 1984 design methods (TGL 10545; 10546)
Driving speed	975 rpm
Transmission ratio	49.728
Bearings fitted	Plain journal bearings
Weight of gear drive unit	approx. 54,000 kg
Rehabilitation capability of the original gear drive	New, re-designed welded helical gears would be supplied. The helical gears and the coupling star are a shrink-fit. A two-piece cover is necessary for the output shaft!

Replacement Variant

Available as gears for installation in existing non-worn casings. It would be appropriate to renew the antifriction bearings as well.

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