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  • Catastrophic Cargo Crane Slewing Ring Failure

    2014-12-10 · The failure of the crane’s slewing ring led to the crane body collapsing into the cargo hold. The jib fell across the main deck with the jib head resting just above the wharf and the crane cab sustained structural damage. Fortunately no one was injured other than the crane operator who escaped with a broken ankle.

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  • Investigation: 110 - Structural failure of a cargo

    2016-5-19 · The crane was not overloaded at the time of the failure. The slew ring bearing failed following a prolonged period of progressive wear which went undetected at any statutory survey or examination. The extreme wear which led to the bearing failure was induced largely by an almost total absence of lubrication …

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  • Avoid slewing ring bearing failure with these six ...

    At a glance: six steps to save slewing ring bearings. More than 96% of slewing ring failure could be avoided by following simple maintenance tips. Grease regularly. Apply a liberal shot of extreme-pressure grease to the fittings around the bearing's circumference at intervals recommended in the operator's manual. Purge with …

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  • Slew Ring Bearing Failure Analysis - BEARING

    2020-3-19 · 1 Failure cause analysis. There are two reasons that affect the normal operation of tower crane slewing bearings. On the other hand is the factory before the assembly and processing, working environment, maintenance. If the design and selection of slewing support is improper, it will affect the performance and safety of tower crane …

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  • Fault analysis of slewing bearing – Slewing ring

    2021-3-5 · Crane top collapse (6%) Slew Ring Failure (5%) Base Failure (16%) Unknown (18%) TWC Identified Cause 19 19 22 70 Mechanical, Electrical or Structural (15%) Environmental (15%) Human Factors (17%) Unknown (54%) TWC Examples of Accidents . TWC Environment Liverpool - January 2007

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  • A Review of Recent Tower Crane Accidents and the

    This causes permanent deformation in the local area, leading to early failure. The unique design of slewing ring bearings allows for combination loads to be handled quite efficiently. However, whenever a load is applied that exceeds the bearing capacity, permanent deformation could occur, again leading to a premature failure.

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  • The importance of slewing ring bearing

    2019-10-30 · The tower crane has abnormal noise during the turning process, which is most likely caused by severe wear of the slewing bearing raceway and the rolling element. At this time, the slewing bearing needs to be repaired or replaced. The above is the analysis of the slewing bearing failure of the tower crane.

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  • What are the failures of tower crane slewing

    2019-6-18 · installation site; The ship crane is mainly composed of rotating tower, boom, fixed base post welded to the deck, lifting, tilting and swinging mechanism, hydraulic power and piping system, electrical control system,etc. Marine crane has turntable bearings mounted on the bottom of the crane tower body.The lower end of the inner ring …

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  • slewing bearing for marine crane – Slewing ring

    2020-3-10 · crane manufacturer should be consulted for bolt nut washer replacement criteria and for the specific installation procedures that should be followed. Notes High tensile bolt connections are used on tower crane joints, including those on mast, jib and slew rings bearings. They consist of a bolt, nut, and

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  • A Review of Recent Tower Crane Accidents and the

    2021-3-5 · Crane top collapse (6%) Slew Ring Failure (5%) Base Failure (16%) Unknown (18%) TWC Identified Cause 19 19 22 70 Mechanical, Electrical or Structural (15%) Environmental (15%) Human Factors (17%) Unknown (54%) TWC Examples of Accidents . TWC Environment Liverpool - January 2007

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  • Marine crane failure - All Things Cranes

    2014-8-18 · A marine crane on the bulk carrier Seapace broke free from its pedestal this week, seriously injuring the operator. The incident occurred while unloading at the port of Bécancour, Quebec when the slew ring failed and the crane fell into the hold. The crane operator, 45, suffered a broken ankle among other injuries.

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  • Deck crane slew bearing rocking tests - dieselduck

    2011-12-30 · Deck crane slew bearing rocking tests Post by JK » Tue Dec 20, 2011 12:46 pm A number of incidents have occurred recently involving failure of the slew bearings of ships’ cargo deck cranes, resulting in crane …

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  • Prepared by the Health and Safety Laboratory for the ...

    2019-12-5 · slew turret. These are attached to the top of the mast section via a slewing ring that permits the top of the crane to rotate through 360º. The hook of this type of crane is positioned by travelling the hook along the main jib and by rotating the top of the crane via the slewing ring.

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  • Battersea crane verdict - All Things Cranes

    2012-3-13 · The overloading was due to an incorrect manual being used in the erection of the crane. On the 25th July 2006, four inner slew ring bolts failed and all of the slew ring bolts were replaced. No investigation was undertaken as to the root cause of the bolt failure. On the 26th July 2006 the crane was returned to service.”

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  • Weathering Heights - Cranes Today

    2016-5-10 · The Battersea tower crane accident in 2006 - in which an employee and member of the public were killed when a tower crane collapsed in high winds - occurred when failed slew ring bolts were replaced and the crane was put back into service without an investigation into what had caused them to fail.

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  • Safe Use Of Top Slew Tower Cranes

    Safe Use Of Top Slew Tower Cranes [zpnx5jeyq14v]. ... Download & View Safe Use Of Top Slew Tower Cranes as PDF for free.

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  • how to make a slew bearing ship cranes | GBS

    Crane Basics - Seatrax, Inc. Offshore Cran. Roller Bearing Type Cranes The revolving superstructure bolts on top of the roller bearing Roller bearing subject to full overturning moment from weight of load, the crane itself and boom Failure of bolts or the slew roller bearing can and has led to loss of operator ...

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  • Important Tower Crane Safety Considerations To

    In case the parking brake is left on and the slew ring is parked in a fixed position, there is a huge risk that the wind will blow against the jib and impose loads on the crane that it's not engineered to sustain. 3. Make sure there are no tools, bolts, nuts or any debris that can blow off the top of a crane during severe weather.

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  • Grease Analysis: Early Warning System for

    2 天前 · Keep in mind that a failure investigation after damage has occurred often requires a more complex analysis, and not every test method is designed to be a routine analysis. In summary, grease analysis has proven to be a useful tool to evaluate grease and bearing condition.

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  • Lifter borer boom failure | WorkSafe.qld.gov.au

    The major inspection should include dismantling of the boom, pins, slew ring and outriggers along with comprehensive inspection of all high stress areas. This is consistent with the information provided in the Mobile Crane Code of Practice 2006 (PDF, 1.34 MB) for major inspections on mobile cranes.

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  • Flat top snap

    The failure is down to a connection pin/bolt or other failure between the tower and slew ring section. How or why it failed like this when out of service and calm days is the focus of an investigation by the rental company operating the crane – Reds Global and the authorities.

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  • 1 TECHNICAL DESCRIPTION - Offshore Crane

    2014-4-14 · The crane is designed with a general crane dynamic factor of 1.4 and a pedestal slew ring fasteners is designed with dynamic factor of 2.0 according to DNV requirement for offshore crane. ! The crane is designed for efficient and accurate offshore/sub sea load handling of general cargo at max. 32 33 meter …

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  • Tower crane incident in Finland - dispatchb2b.com

    A tower crane lost its jib and counter jib on a site near Helsinki airport in Finland yesterday. The crane, a Terex Comedil CTT 561-A20 20 tonne flat top, with counterweighted base, was operated by the main contractor Pallas Rakennus, on the construction of apartments in Vantaa, on the east side of the airport, due north of …

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  • Tower crane incident in Finland | Vertikal.net

    2019-12-31 · 31.12.2019 Tower crane incident in Finland A tower crane lost its jib and counter jib on a site near Helsinki airport in Finland yesterday. The crane, a Terex Comedil CTT 561 flat top - which was manufactured between 1998 and 2005 - with counterweighted base, was operated by the main contractor Pallas Rakennus on …

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  • Crane Safety Assessment Findings, Results, and

    2016-10-18 · and Gantry Cranes (Top Running Bridge, Single or Multiple Girder, Top Running Trolley Hoist) or ASME B30.17 Safety Standard for Overhead Bridge and Gantry Cranes (Top Running Bridge, Single Girder, Underhung Hoist), as applicable to the type of crane, (as incorporated by reference in §250.198).

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  • Slew Drive Manufacturer | Slew Bearing | Cone Drive

    The slew bearing (also known as slewing rings) and gears are assembled into a low profile, self-retaining, and ready-to-install housing optimized for weight versus performance. Our highly-adaptable slew drive gearboxes also feature strong shock resistance, long life performance, smooth rotation, bearing protection, and sealed …

    Get Price
  • Welding on crane boom - dieselduck

    2016-9-16 · I also have a considerable amount of certification from Lloyds on this crane, we are also collating evidence to submit to LR for the slew ring deferral certificate which means we dont have to split the crane apart to inspect the slew ring bearing. If the crane is not classed, why do we have to do all this.

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  • Falcon fined £750,000 ten years on from

    2016-3-17 · The collapse happened in 2006 at a Barratt Homes development in Battersea. Crane driver Jonathan Cloke was in the cab as the jib fell 50 m on to Michael Alexa, a member of the public who was washing his car in a street beside the site. Both men died.Southwark Crown Court was told sections of the tower crane …

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  • Construction, Working and Maintenance of Stackers

    2019-3-16 · 5 Replacement of Slew Bearing 40 6 Repair of Slew Gear 42 - References 46 . ... layers on top of each other in the longitudinal direction of the pile. ... commonly used method. In this method, a ring-shaped pile is being continuously stacked at one end and reclaimed at the other. Stacking takes place in a fan …

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  • Marine crane failure - All Things Cranes

    2014-8-18 · A marine crane on the bulk carrier Seapace broke free from its pedestal this week, seriously injuring the operator. The incident occurred while unloading at the port of Bécancour, Quebec when the slew ring failed and the crane fell into the hold. The crane operator, 45, suffered a broken ankle among other injuries.

    Get Price
  • Tower Crane Technical Information Note

    2017-1-6 · 3. The crane collapsed when the slew ringbolts failed and the slew ring fractured allowing the main crane assembly to fall from its tower and land upside down on top of the building being constructed. 4. One site worker, a Polish joiner, was killed and the crane driver was injured (not seriously).

    Get Price
  • Lifter borer boom failure | WorkSafe.qld.gov.au

    The major inspection should include dismantling of the boom, pins, slew ring and outriggers along with comprehensive inspection of all high stress areas. This is consistent with the information provided in the Mobile Crane Code of Practice 2006 (PDF, 1.34 MB) for major inspections on mobile cranes.

    Get Price
  • Battersea crane verdict - All Things Cranes

    2012-3-13 · The overloading was due to an incorrect manual being used in the erection of the crane. On the 25th July 2006, four inner slew ring bolts failed and all of the slew ring bolts were replaced. No investigation was undertaken as to the root cause of the bolt failure. On the 26th July 2006 the crane was returned to service.”

    Get Price
  • Safe Use Of Top Slew Tower Cranes

    Safe Use Of Top Slew Tower Cranes [zpnx5jeyq14v]. ... Download & View Safe Use Of Top Slew Tower Cranes as PDF for free.

    Get Price
  • how to make a slew bearing ship cranes | GBS

    Crane Basics - Seatrax, Inc. Offshore Cran. Roller Bearing Type Cranes The revolving superstructure bolts on top of the roller bearing Roller bearing subject to full overturning moment from weight of load, the crane itself and boom Failure of bolts or the slew roller bearing can and has led to loss of operator ...

    Get Price
  • Important Tower Crane Safety Considerations To

    In case the parking brake is left on and the slew ring is parked in a fixed position, there is a huge risk that the wind will blow against the jib and impose loads on the crane that it's not engineered to sustain. 3. Make sure there are no tools, bolts, nuts or any debris that can blow off the top of a crane during severe weather.

    Get Price
  • Falcon fined £750,000 ten years on from

    2016-3-17 · The collapse happened in 2006 at a Barratt Homes development in Battersea. Crane driver Jonathan Cloke was in the cab as the jib fell 50 m on to Michael Alexa, a member of the public who was washing his car in a street beside the site. Both men died.Southwark Crown Court was told sections of the tower crane …

    Get Price
  • Slew Drive Manufacturer | Slew Bearing | Cone Drive

    The slew bearing (also known as slewing rings) and gears are assembled into a low profile, self-retaining, and ready-to-install housing optimized for weight versus performance. Our highly-adaptable slew drive gearboxes also feature strong shock resistance, long life performance, smooth rotation, bearing protection, and sealed …

    Get Price
  • 4. MAINTENANCE MANUAL - opcois.com

    2010-7-28 · Winch slew gear drive pinion 1M/100H Apply special grease to drive pinion and ring tooth. 1Y/500H Check for wear abnormal tooth clearance ! Replace if damaged. Wire 3M/200H Apply grease onto wire 1M/200H Inspect due to corr. & wear. Rub length of wire with a cloth to detect broken strands. 3M/100H

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