Re: Ball Mill Girth Gear and Pinion Alignment. 08/27/2011 2:07 AM. pinion alighnment is done by coating the pinion with a lead based grease. after rotating the drum, the grease marks will show the contact area. the pinion should contact the girth "ring" near the center of the gears…
SAG mill at Cadia (described by Dunne et al., 2001) is shown in Figure 3. Figure 2 – Example motor power available as a function of motor speed ... and the gear ratio of the mill bull gear and the drive pinion. CASE STUDY N° 1: CHANGING PINION ON A FIXED SPEED MILL
Girth Gear Applications Girth gears fall into two basic categories; flange mounted and tangential spring mounted. Flange-mounted girth gears, the more common of the two, are most frequently utilized in "cold" processing equipment such as SAG (semi autogenous grinding) mills and ball mills for use in the mining and cement industries.
The grinding process with one 34' x 20' SAG mill and two 24' x 39.5' ball mills will be briefly discussed. All three mills are gear driven by a ring gear, dual pinion and two low speed synchronous motors. Copper Mountain has installed on all three mills, the new state-of-the art dual pinion mill drives.
The cost of edge drive is low, but the pinion needs to be replaced every 2-5 years. Edge drive is mainly used in coal mills and mills with small power. The girth gear(big ring gear) and pinion are the key of the edge transmission device. Their reliable operation is directly related to the stable production of the mill.
This white paper focuses on the work carried out by Alphatec Engineering in the rehabilitation of the mounting system (concrete foundation, anchoring, and grout) of a pinion-bearing pedestal of an 8,5 m ø x 3,8 m semi-autogenous grinding mill (SAG mill) driven by a 4000 kW electric motor. The project was part of a major intervention at two ...
The transmission of power to the mill takes place from a bull gear at the final stage. This bull gar is made smaller by multiple pinions meshing with the bull gear. The load sharing between the pinions are ensured by the function of planetary differential. The system is a combination of conventional gear & pinion system and planetary thus ...
P-F Curve Mill Gearing Diagram (with examples) When ingress and indentation starts (Plastic Deformation, Abrasion, Localized Overloading) — when detectable crack forms ~ 3mm with ECA — cracks relieved — functional failure. There two main points of the PF curve:
CR4 – Thread: Grinding ball mill girth gear root clearance. How do you measure the root clearance between a girth gear and a pinion of a grinding ball mill and what is the recommended root …
Ring gear drives huge grinding mill. March 1, 2000. By this summer, a grinding mill that is bigger around than a Boeing 747 will turn chunks …
Specific Energy Consumption is the power draw of a mill (kW, usually corrected to the pinion or ... and the bull gear-pinion efficiency (×0.985). ... This will usually be feed belt sample in the ...
gear driven mill, the motor speed is a function of the mill speed ⌽ RPM, and the gear ratio of the mill bull gear and the drive pinion. Case study No 1: Changing pinion on a fixed speed mill A common way of changing the speed of a mill that is driven by a fixed-speed motor is to change the pinion to a new design with an additional tooth.
13' x 21' ALLIS-CHALMERS Ball Mill. One only used AC Ball Mill with 2,000 HP synchronous motor & Rubber Liners. Mill is 1979 model, and completely rebuilt in 1998. 253 tooth bull gear. 21 tooth . pinion gear. Eaton Airflex clutch. Trommel discharge with lube system.
HORSBURGH & SCOTT AWARDED $1.2M ORDER FROM A WESTERN MINING LEADER FOR SAG MILL REPLACEMENT GEAR. ... After analysis and tear down, Horsburgh & Scott identified a large bull gear with custom pinion that had excessive wear in one location of gear mesh. Shock load requirement in conjunction with gear accessory called for frequent maintenance and ...
A client has a second hand Sag mill with no detail drawings of the mill pinion and girth gear. The mill pinion has not been turned around so it has one unworn side. To manufacture a new pinion I am advised that the pinion must be removed, taken to a the manufacturers, and accurately measured on their 3D machine, and then returned and replaced ...
We rebuilt gears to meet original manufacturer's specifications. United Gear Works Has Over 55 Years In The Gear Repair Industry We Can Provide Custom Manufacturing Of Gears Up To 25' diameters Or 30,000 lbs! Where Our Competitors Would Simply Offer A 12 Month warranty We Go The Extra Mile And Offer A 48 Month Warranty On All Repairs No ...
SAG Mill Components. ... from gear vendors determine the minimum number of pinions which can be used to drive the mill as well as the number of gear sections. If the mill requires approximately 6000 horsepower or less, it is possible to drive it with a single pinion. ... dual synchronous motors are available to drive dual pinion gear ...
bull gear, damaging this gear and one of the pinion gears on the dual drive mill. To enable the SAG mill to be restarted, the damaged teeth on the bull gear were reprofiled to reduce the load on these damaged teeth, the north pinion gear was replaced with a spare, and the rotation of the mill motors was reversed.
Online pinion temperature monitoring of the pinion with infrared temperature sensors is the most consistent and effective means of detecting misalignment of gear driven mill systems, allowing the user to quickly detect and correct any misalignment that may develop.. A common failure cause of gear driven mill systems is misalignment, which in its most severe form can cause rapid tooth fatigue ...
Overview on the grinding mills and their dual pinion mill drives The grinding process with one 34' x 20' SAG mill and two 24' x 39.5' ball mills will be briefly discussed. All three mills are gear driven by a ring gear, dual pinion ...
10. The subject bull gear was a replacement ordered for the 44 Mill, Stand 2 from the Philadelphia Gear Company on July 23, 1990. This order followed a service inspection report dated July 16, 1990, that noted that the pre-1990 bull gear had a 'face runout of the [pre-1990] main gear of 0.080," ' indicating that is was "bent or warped,"
8 Ft x 21 Ft Traylor Ball Mill, one extra head in good condition, Bull Gear: 266 tooth excellent condition, Pinion: 20 tooth one spare pinion in good condition, 500hp Synchronous Motor, speed 300 RPM, 4000v, spare Bearing Housings, One spare motor, single door but could support a second door, two complete sets of new rubber liners, shell can be resize to any size.
The Huckleberry mill went down on February 26, 2014 when a tooth failed on the semi-autogenous grinding (SAG) mill bull gear, damaging this gear and one of the pinion gears on the dual drive mill. To enable the SAG mill to be restarted, the damaged teeth on the bull gear were reprofiled to reduce the load on these damaged teeth, the north ...
A replacement bull gear and two pinion gears for the SAG mill have been ordered and are expected to be on site by September. ... Edition 10 / 2013 - Hofmann Engineering Pty. Ltd. addition to the 17,000kW double pinion SAG mill gear shown in the ... Due to the mine having 4 Hoist Transmissions at risk of failure a first priority delivery was...
mill has manual roll set is complete less … 230/460 volt v-belt drive to jack shaft to pinion bull gear drive. farrel mills bears s/n … ball mill, 10 'diameter (3.05m) x … [Photos] best quality cement ball mill manufacturer,View ball …
sag mill with bull gear for copper. Jim O'Rourke,President and CEO of Copper Mountain, remarked "During the second quarter of, Copper Mountain completed the SAG mill bull gear sag mill pinion and bull gear,Autogenous mills, semi-autogenous mills and ball mills for wet grinding. A company of Polysius alignment of the girth gear.
Gearbox Repair, Gear Repair, Spur Gears, and manufacture of new Gears. Precision Machine Works of Atlanta repairs and rebuild Gears and repair that are worn out or suffered broken teeth. We build them back and re-cut and hard face them back to standard. We also can manufacture new gears of all kinds we have the capabilities to manufacture gears ...
mill in diameter and length, the grind-ing media, the theoretical critical speed of rotation, and the interior configura-tion of the mill. Unfortunately, to get what is required, this information needs translation into something that the gear designer can input into the rating calcu-lations. The calculation of …
how to set backlash ball mills. SAG mill ball mill ring gear dual pinion drive systems variable speed the inching mode in the ABB drives are currently set to turn the SAG mill at about 10 of backlash phenomenon occurs between the pinions and ring gear. Get a Quote Send Message
PARTS from MORGARDSHAMMAR 17' x 16' Sag Mill including 1000 kw motors, bull gear, 28-Tooth pinion gear, gearboxes and more. Manufacturer: MORGARDSHAMMAR. Inventory ID: …
