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  • slewing bearing condition monitoring - XZWD

    2019-3-18 · There are several vital design components of a crane, including slew ring bearings. These slewing bearings allow the crane to rotate 360 degrees, while sustaining the load of the crane and associated weights, including the payload and counterbalance. A failure of the slew ring bearing would result in an operational breakdown that could end in ...

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  • Causes and repairing methods of slewing rings in ...

    2021-4-15 · The function of the slewing mechanism is to support the dead weight of the slewing part of the crane and bear vertical force of the lifting load and tilting moment, it is driven by the slewing drive device to make a full circle rotation around the slewing center to lift the heavy objects and and place them in different places.

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  • Crane slew ring bearing manufacture and installation

    2016-9-6 · Alatas offers high quality slewing bearings at reasonable prices and with delivery times of 60 to 90 days. Quality control is carried out by Alatas personnel from the forging to the packaging of the finished product according to Class procedures.

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  • Rigging & Sling Failures: Case Studies & Solutions

    2017-10-8 · rigging, and lifting activities throughout a variety of industries. •30+ years learning about wire rope, rigging, load handling, and lifting activities. •Vice Chair of the ASME B30 Main Committee which sets the standards in the US for cranes and rigging •Chair of the ASME P30 Main Committee which sets the standards for lift planning.

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  • Fault analysis of slewing bearing – Slewing ring

    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 for a long time.

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  • The importance of slewing ring bearing maintenance

    In lifting equipment, the large diameter bearing serves as a joint between the upper structure and the undercarriage, providing a means of 360-degree rotation. Lifting devices typically have a complex load spectrum: the slewing ring bearing can simultaneously handle all combinations of thrust, radial, and tilting moment loading.

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  • How to maintain slewing ring bearings in cranes &

    2019-10-27 · In lifting equipment, the large diameter bearing serves as a joint between the upper structure and the undercarriage, providing a means of 360º rotation. Lifting devices typically have a complex load spectrum: The slewing ring bearing can simultaneously handle all combinations of thrust, Radial, And tilting moment loading.

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  • Crane Slewing Bearing Maintenance | SCIENCE PARK

    2021-2-26 · Lifting operations What you need to do. The law says that all lifting operations involving lifting equipment must be properly planned by a competent person; appropriately supervised; and carried out in a safe manner.. Cranes and lifting accessories such as slings must be of adequate strength, tested and subject to the required examinations and inspections.

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  • Crane slew ring bolts shear | Vertikal.net

    2015-9-16 · The crane was lifting a tree from the back yard of the home when the incident occured It appears that several slew ring bolts failed while the crane was lifting a section of the tree - that has come down during an earlier storm- causing the boom of the vintage Manitex to break free and slice through a garage alongside the house, amazingly it came down alongside the car parked inside and ...

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  • Slew Ring | Boltstress Ultrasonics

    Slew Ring Slewing ring bearing bolts have a direct effect on bearing life, put simply if the bolt tension is incorrect or relaxes the bearing wear rate increases. We first became involved with these in 1995 on North Sea Offshore cranes.

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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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  • Crane Safety Assessment Findings, Results, and

    2016-10-18 · Crane inspections may be conducted by a USCG marine inspector or by one of two authorized third-party inspectors. On April 25, 2014, BSEE initiated the Crane Safety Assessment. The study involved analysis of cranes and material handling equipment operating on the OCS, analysis of BSEE lifting Potential Incidents of

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  • Cranes - Huisman Equipment

    Heavy Lift Mast Cranes. The Huisman Heavy Lift Mast Crane (HLMC) is a compact and powerful crane with high lifting capacities up to 1,500mt. This crane type is designed for oversea transport of large and heavy equipment onboard heavy lift vessels.

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  • Mobile Cranes – Erne Lifting Services

    Erne Lifting Services crane inspector staff are trained by Grove Worldwide in mobile crane inspection, undertaking examinations in Ireland and recently as far away as continental Europe, on a wide range of mobile cranes ranging rom 18 t to 1000 t.

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  • Safe use of excavators used as cranes study notes

    2016-4-20 · becomes a crane, if you want to use it for lifting more than a ton then three ... The slew radius for lifting is measured from the centre of the slew ring to the vertical line through the accessory attachment point. ... re-adjust the lifting equipment and start another test lift.

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  • Guide to inspecting and maintaining cranes

    2020-3-30 · intervals, according to the crane manufacturer’s instructions. Where there is documented evidence that inspection and testing has been carried out . on certain items, for example slew ring bolts, drive systems and braking systems, within a reasonable preceding period (as determined by a competent person) the item may

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  • Guide to mobile cranes 2015 - Safe Work Australia

    2020-3-30 · rated capacity of the crane, within the tolerance of 100 to 110 per cent in order to prevent lifting and radius increases. It is important that mobile cranes are operated within their rated design capacity. Working radius indicators . A radius indicator displays the radius of the suspended load generally measured from the centre of the slew ring.

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  • (PDF) Survey and Examination of Ships' Lifting

    Survey and Examination of Ships' Lifting Appliances. Robert Perusic. Related Papers ( Vol 1 ),2013 Guidelines for Certification of Lifting Appliances , By salsa ajeng. DNV_Standard2-22 - Copy - Copy (2) - Copy.pdf. By Prabir Datta. Safety and health in ports. By Salman Rolex.

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  • Slew Ring | Boltstress Ultrasonics

    Slew Ring Slewing ring bearing bolts have a direct effect on bearing life, put simply if the bolt tension is incorrect or relaxes the bearing wear rate increases. We first became involved with these in 1995 on North Sea Offshore cranes.

    Get Price
  • Cranes - Huisman Equipment

    Heavy Lift Mast Cranes. The Huisman Heavy Lift Mast Crane (HLMC) is a compact and powerful crane with high lifting capacities up to 1,500mt. This crane type is designed for oversea transport of large and heavy equipment onboard heavy lift vessels.

    Get Price
  • (PDF) Slewing Port Jib Cranes - ResearchGate

    As a practical example the paper presents the slewing port jib crane with the capacity of 25/15/5 t at a 27/37/40 m radius made by the Slovenian company Metalna Maribor for the shipyard 3. Maj ...

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  • MODEL 5 HARBOUR CRANE - Bergen havn

    2018-1-11 · Crane type G HMK Maximum lifting capacities See variants Dimensions and weights ... Central lubrication system for slew ring, ... Refer to the appropriate Operator’s Manual for instructions on the proper use of this equipment. Failure to follow the appropriate Operator’s Manual when using our equipment or otherwise failure to act ...

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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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  • A Review of Recent Tower Crane Accidents and the

    2021-1-5 · Crane had been in use for a number of weeks after erection Bolts in the joint below slew ring failed through fatigue Jib fell across site into an adjacent road Crane Driver + Member of public killed Slew ring bolts had been replaced in the air, shortly after erection Crane had been erected with too much counterweight Issues:-

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  • 1 TECHNICAL DESCRIPTION - Offshore-Crane.com

    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 working radius.

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  • Safe use of excavators used as cranes study notes

    2016-4-20 · becomes a crane, if you want to use it for lifting more than a ton then three ... The slew radius for lifting is measured from the centre of the slew ring to the vertical line through the accessory attachment point. ... re-adjust the lifting equipment and start another test lift.

    Get Price
  • (PDF) Survey and Examination of Ships' Lifting

    Survey and Examination of Ships' Lifting Appliances. Robert Perusic. Related Papers ( Vol 1 ),2013 Guidelines for Certification of Lifting Appliances , By salsa ajeng. DNV_Standard2-22 - Copy - Copy (2) - Copy.pdf. By Prabir Datta. Safety and health in ports. By Salman Rolex.

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  • Section 3 Offshore cranes

    2021-2-11 · Due to the severe nature of the offshore environment the duty factor F d is defined as 1,20 for all offshore cranes and other lifting equipment being used in open sea/offshore conditions. Alternative proposals to use lower duty factors shall be based on the principles as outlined in Ch 4, 2.3 Duty factor 2.3.2 and will be specially considered.

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  • Deck crane slew bearing tests_UWE Slewing bearing

    2019-12-24 · Deck crane slew bearing tests Date: 2014-07-18 16:28 A number of incidents have occurred recently involving failure of the slew bearings of ships’ cargo deck cranes, resulting in crane losses and serious injury to personnel.

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  • Crane Inspection on a Major Jack-Up Vessel |

    2020-12-3 · Outreach Offshore Performs a Crane Inspection on a Major Jack-Up Vessel ... greasing all moving points and the slew bolt torque values were verified on the slew ring as well as the main holding down bolts. ... vital lifting equipment would be at risk of breakdown failure or the life span of a piece of equipment being cut short prematurely due ...

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  • Mobile harbor cranes | Konecranes

    2021-5-10 · Konecranes Gottwald Cranes on Barge combine proven mobile harbor crane technology from the slew ring upwards with barges. Rubber-Tired Portal Harbor Cranes The Konecranes Gottwald Rubber-tired Portal Harbor Crane has a sufficiently generous portal to allow traffic to pass under it.

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  • Lifting and Hoisting Procedure Inspection Testing and ...

    2012-11-14 · Lifting equipment, inspection, testing, certification ... Slew ring rocking clearances shall be taken and recorded annually by the Owner. The clearances shall be compared against the maximum allowable, specified by the crane manufacturer. ... Following the load test of the crane, the Lifting Engineer shall carry out a thorough inspection of the ...

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  • MODEL 5 HARBOUR CRANE - Bergen havn

    2018-1-11 · Crane type G HMK Maximum lifting capacities See variants Dimensions and weights ... Central lubrication system for slew ring, ... Refer to the appropriate Operator’s Manual for instructions on the proper use of this equipment. Failure to follow the appropriate Operator’s Manual when using our equipment or otherwise failure to act ...

    Get Price
  • Crane services site map - alatas.asia

    2016-9-6 · > Hydralift crane repairs > KGW crane slewring bearing overhaul > Liebherr BOS 240/5000 offshore crane, slew ring changeout > Liebherr CCB container crane repairs and dry docking > Liebherr crane inspection > Liebherr luffing winch repair > Liebherr deck crane slewing bearing ring failure > Liebherr crawler crane parts > Liebherr deck crane ...

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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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  • This Code of Practice is prepared by the - Labour

    2017-12-19 · A condition when a crane is subject to an overturning moment which cannot be increased by even a small amount without causing the crane to fall over. Free-standing height The maximum height at which a tower crane can operate without being held by ties or guys. Gauge The dimension between the inner faces of the rail heads of the rail track of a ...

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  • CRANE INSPECTION CONTRACTS - alatas.asia

    2016-4-2 · carry out annual and 5 yearly crane & lifting gear inspections & load tests as per ILO 152. IACS approved Service Supplier status is in progress. • Annual and 5-yearly lifting gear inspections, load testing, supply of water bags , and cargo gear endorsements, all out of one hand. • Cost savings for owners, no need to engage separate

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  • Mobile crane lift near railway.

    2014-7-30 · Keep away from the boundary, so nothing can fall onto the railway land 2. Proper Lifting Plan 3. Good, properly designed and constructed, working platform for crane 4. Keep any 'carries' away from the railway, to achieve item 1 5. Do not swing jib over the boundary under any conditions - crane positioning and slew limiters will cover this 6.

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  • (PDF) Advance Crane Lifting Safety through Real-time

    PDF | On Oct 1, 2015, Yihai Fang and others published Advance Crane Lifting Safety through Real-time Crane Motion Monitoring and Visualization | Find, read and cite all the research you need on ...

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  • SHIP CRANES WIRES PROBLEMS AND THEIR PREVENTION

    2021-4-28 · LOLER – Lifting Operations & Lifting Equipment Regulations (UK ) Covers cranes, wires, loose gear . ... • Measure wear of slew bearing (Rocking Test) ... •Common stevedore damage is due to wire failure or operating crane outside limits

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  • SAFE USE OF LIFTING EQUIPMENT

    2014-6-19 · Failure of lifting equipment can result in serious or fatal injury. Inspection of lifting equipment All lifting equipment must be regularly inspected by a competent authority. Tarmac currently uses a specialist company - Bureau Veritas - at most sites. The testing intervals are: • lifting equipment not used for lifting persons – 12 months

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  • Lifting and Hoisting Procedure Inspection Testing and ...

    2012-11-14 · Lifting equipment, inspection, testing, certification ... Slew ring rocking clearances shall be taken and recorded annually by the Owner. The clearances shall be compared against the maximum allowable, specified by the crane manufacturer. ... Following the load test of the crane, the Lifting Engineer shall carry out a thorough inspection of the ...

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  • 80 US t (73 t) Lifting Capacity Truck Crane Sales Flyer ...

    2018-4-25 · Slew ring. External slew ring is easily greased via two accessible grease zerks within the cab. Remote mounted lters. Filters are remote mounted for ease of access. Hydraulic quick disconnects are standard. Provided for ease of installation of pressure check gauges. T 780-1 . Optional Equipment. sUpper cab air conditioning sUpper cab propane heat

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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.”

    Get Price
  • BANKSMAN SLINGER ANSWERS - Ritchies Offshore Services

    2020-2-26 · SLEW LEFT OR RIGHT 64. How often should lifting gear be inspected by a competent person? A. Every 6 months B. Every 4 years C. Every 14 months 65. What action should be taken with a rejected item of lifting equipment? A. Carry on to a convenient break and report it B. Take them out of service and report findings C. Store them in a locker 66.

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  • MODEL 5 HARBOUR CRANE

    2018-4-25 · Max. lifting capacity 100 t Hoisting speed 0 120 m/min Hoist configuration 1 x 2 = one 2-rope hoist Diesel engine power 765 kW. Classification of the crane as a whole in appliance groups A2 to A7 as per the F.E.M. 1.001 design rules. Lifting capacity on hook [t] Heavy load Lifting …

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  • Crane - Load Calculation Template

    2020-2-26 · Crane Configuration – Radius: 12m – Boom length: 32.4m (Crane can lift 4.5 tons) Crane Utilisation Load 4t x 100 4.5 = 88.8% Crane Utilization too high for hazardous area (Chemical Plant) You would need to Reduce Boom Length or Reduce Crane Radius Load 4t (@10m) x 100 5t = 80.0% Crane Utilization Good 1.8m (Dia)

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  • Falcon fined £750,000 ten years on from Battersea

    2016-3-17 · Falcon fined £750,000 ten years on from Battersea collapse. Open-access content. 17th March 2016. 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.

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