Email:[email protected]

slew bearing rocking motion test ship cranes

Just fill in the form below, click submit, you will get the price list, and we will contact you within one working day. Please also feel free to contact us via email or phone. (* is required).

  • Slewing bearing rocking test - XZWD - slew

    Cranes fitted with this type of slew. bearing must have rocking tests carried out, in accordance with manufacturer’s instructions, to determine that the amount of wear in the bearing races is within permitted limits. Although cranes with single ball race slew bearings are considered to be most at risk, rocking tests on all deck cranes,

    Get Price
  • Deck Crane Slew Bearing Rocking Tests - Evon

    2021-1-4 · Without accurate slewing bearing inspections, the classification may not be completed, and more wear may have occurred than the tests revealed. This process is commonly but inaccurately called a rocking test. The rocking test methodology is irrelevant in the marine sector as ship cranes do not have a counterweight so cannot rock. This means the ...

    Get Price
  • Marine Crane Slewing Bearing Inspections | Alatas

    2011-12-30 · bearing must have rocking tests carried out, in accordance with manufacturer’s instructions, to determine that the amount of wear in the bearing races is within permitted limits. Although cranes with single ball race slew bearings are considered to be most at risk, rocking tests on all deck cranes, where recommended by the crane manufacturer ...

    Get Price
  • Deck crane slew bearing rocking tests

    The slewing bearing rocking test should be done periodically for the bearing wear tracking and early failure detection. The measurement could be done from the inside and outside of pedestal. Follow the maker's recommendations and conduct the test at the same check points as during the initial test during commissioning in order all subsequent ...

    Get Price
  • How to conduct a rocking test of the crane?

    2015-2-3 · Rocking Test. It is a test which is carried out to find, wear down of the slew bearing of the deck crane on ships.this measures the play (or relative movement) between the inner and outer bearing race, to give an indication of the wear taking place. The Rocking Test need to be carried out according to manufacturer recommendation Measurements ...

    Get Price
  • Rocking test of deck crane - DieselShip

    Deck crane slew bearing tests_UWE Slewing bearing-slewing ring/slewing bearing - Dalian United Wind Power Generation Bearing Co., L. Cranes fitted with this type of slew bearing must have rocking tests carried out, in accordance with manufacturer’s instructions, to determine that the amount of wear in the bearing races is within permitted limits. ...

    Get Price
  • Cranes Rocking test - Torque Techniques

    2015-2-3 · Rocking Test. It is a test which is carried out to find, wear down of the slew bearing of the deck crane on ships.this measures the play (or relative movement) between the inner and outer bearing race, to give an indication of the wear taking place. The Rocking Test need to be carried out according to manufacturer recommendation Measurements ...

    Get Price
  • Deck crane slew bearing tests_UWE Slewing bearing

    2019-12-24 · Cranes which are particularly at risk are those with single ball race slew bearings. Cranes fitted with this type of slew bearing must have rocking tests carried out, in accordance with manufacturer’s instructions, to determine that the amount of wear in the bearing races is within permitted limits.

    Get Price
  • March 9, 2009 No. 06/2009 Deck crane slew bearing

    2009-3-18 · Cranes which are particularly at risk are those with single ball race slew bearings. Cranes fitted with this type of slew bearing must have rocking tests carried out, in accordance with manufacturer’s instructions, to determine that the amount of wear in the bearing races is within permitted limits.

    Get Price
  • Test Certificate for Rothe Erde Slewing Rings Rothe Erde ...

    2012-11-15 · Bearing Inspection Offshore Cranes. A ThyssenKrupp Technologies company Rothe Erde TK KD 125 ... in the axial motion of the bearing. Depending on the individual con-ditions, wear can be determined ... Three-row roller bearing slewing ring – basic test setup for axial reduction measurement.

    Get Price
  • Liebherr Ship Crane Overhaul | Alatas Crane Services

    2019-6-3 · Liebherr Ship Crane Overhaul Job Scope. Slew bearing clearance test (rocking method) Hydraulic, electronic and electronic system checks and configuration. Advised shipyard to replace jib head bearing, luffing cylinder bearing, grease lines, and steelwork. Additional Alatas attendance is required to complete work once spare parts are available.

    Get Price
  • Guide to inspecting and maintaining cranes

    2020-3-30 · GUIDE TO INSPECTING AND MAINTAINING CRANES Component tested NDT description NDT frequency Slew ring bolts – slew rings Crack test bolts 5 years Boom chord thickness Material thickness testing 10 years Slew ring Crack test 10 years Hydraulic luffing cylinder gland nut Crack test 10 years Hydraulic luffing cylinder and ram-rod ends and caps

    Get Price
  • Slewbearing replacement on Liebherr S type crane

    2016-9-6 · Replacement of slewing bearing & pump distributor gearbox on Liebherr S-type crane in Changxing S.Y. Liebherr S type crane slew bearing change gallery:

    Get Price
  • Crane Slewing Bearing Replacement Kuzeystar

    2012-11-14 · 6.2 Inspection and Load Test of Cranes in Table 1 31. ... Slew Ring . 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. ... chains, load bearing structure etc.) Static Load Test .

    Get Price
  • Lifting and Hoisting Procedure Inspection Testing and ...

    2020-10-3 · specific bearing is provided immediately preceding the table listing that bearing. General information and information common to all slewing bearings can be found in the chapters “Principles of bearing selection and application” and “Mounting, inspection and storage”. Please note that all information related to bearing performance, e.g ...

    Get Price
  • SHIP CRANES WIRES PROBLEMS AND THEIR PREVENTION

    2014-7-18 · Cranes which are particularly at risk are those with single ball race slew bearings. Cranes fitted with this type of slew bearing must have rocking tests carried out, in accordance with manufacturer’s instructions, to determine that the amount of wear in the bearing races is within permitted limits.

    Get Price
  • Slewing bearings - Liebherr

    2021-4-28 · • Measure wear of slew bearing (Rocking Test) ... SHIP CRANES WIRES PROBLEMS AND THEIR PREVENTION. END OF PRESENTATION . Thank you for your kind attention. Title: LOC Powerpoint template – New Brand 2015 Author: Emma Winsey Created Date: 4/28/2016 8:50:03 AM ...

    Get Price
  • MARINE ENGINEERING KNOWLEDGE: What is the

    2013-12-1 · The Rocking Test need to be carried out according to manufacturer recommendation Measurements are typically taken in four positions on the slew bearing, with the jib pointing: • forward to the ship • starboard • aft • port side.

    Get Price
  • Guide to inspecting and maintaining cranes

    2020-3-30 · GUIDE TO INSPECTING AND MAINTAINING CRANES Component tested NDT description NDT frequency Slew ring bolts – slew rings Crack test bolts 5 years Boom chord thickness Material thickness testing 10 years Slew ring Crack test 10 years Hydraulic luffing cylinder gland nut Crack test 10 years Hydraulic luffing cylinder and ram-rod ends and caps

    Get Price
  • Lifting and Hoisting Procedure Inspection Testing and ...

    2012-11-14 · 6.2 Inspection and Load Test of Cranes in Table 1 31. ... Slew Ring . 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. ... chains, load bearing structure etc.) Static Load Test .

    Get Price
  • Series SE/PE Slew Drive – H-Fang

    Multiple precision levels: variable backlash for customizable positioning accuracy. 13 distinct size offerings, up to 25″ bearing diameter. Standard sealing and grease fill. Ideal for dust and debris-prone enviro. Commonly customized. Key applications: PV Solar, Aerial Work Platforms, Truck Cranes, Marine Cranes.

    Get Price
  • Condition monitoring for the safe operation and life ...

    Slew bearing condition monitoring. For the crane to pivot through a full 360 degrees of rotation about a central pedestal, the slew bearing provides the primary operational design requirements and sustains the full load of the crane, its payload and counterbalance. Many slew bearing …

    Get Price
  • Lloyd’s Register Publishes Pocket Guide for Marine

    2011-11-9 · The rocking test is one of the most critical survey items, used to measure the wear of the slew bearing and related structures. Its excess wear combined with bolt failure can lead to …

    Get Price
  • Slewing Rings - Technical Handbook - BALNEX

    2012-1-17 · cer of large-sized bearings called slew - ing rings with a many ye ars tradition. The present production assortment con-tains more than 500 types of standard and special slewing rings. PSL, a.s. has a developed, utilized and certified system of the quality assurance ac-cording to the standard DIN EN ISO 9001. Enviromental Management System ISO ...

    Get Price
  • Guide to inspecting and maintaining cranes

    2020-3-30 · GUIDE TO INSPECTING AND MAINTAINING CRANES Component tested NDT description NDT frequency Slew ring bolts – slew rings Crack test bolts 5 years Boom chord thickness Material thickness testing 10 years Slew ring Crack test 10 years Hydraulic luffing cylinder gland nut Crack test 10 years Hydraulic luffing cylinder and ram-rod ends and caps

    Get Price
  • Measuring of the slewing bearing -

    The bearing raceways, in conjunction with the rolling elements and cages or spacers, are designed to accommodate loads acting singly or in combination, and in any direction. SKF manufactures standard and customized slewing bearings in various designs, with outside diameters from 0,1 to 18 m to meet the demands of particular applications.

    Get Price
  • (PDF) Slew Bearings Damage Detection using Hilbert

    2018-6-1 · Slew ring connection Fixed pedestal ... There should be on board every ship fitted with cranes a manual produced by the manufacturers of the cranes giving ... inspection and a proof load test every five years. Those inspections and testing are in accordance with the ship's Flag State re-

    Get Price
  • Slewing bearings | SKF

    If the turning torque of the bearing increases substantially or if the bearing has tight spots, this usually indicates an uneven load distribution. With excavators, for example, the operator may notice a wobbling or rocking motion in the upper structure, especially when the digging arm is extended with a load.

    Get Price
  • CRANES, THEIR OPERATION AND - P&I Club

    2014-1-28 · Background • API Spec 2C 6th Edition and European standard EN 13852- 1 and -2 both published 2004 addressing offshore crane sizing and safety requirements • API Spec 2C 6th Edition – Focused on cranes for oil production and drilling facilities

    Get Price
  • How to tell when a slewing ring bearing needs to be ...

    2018-1-31 · 2.4.1 Interpretation of the rocking test results The last two rocking test prior to the accident were carried out on 26 February 2016 and 31 August 2016. Results from these two tests are tabulated in Table 4. Table 4: Readings taken during the latest two rocking tests prior to the accident Test date ‘B’ – ‘A’ (mm) Max. diff = 0.7 mm

    Get Price
  • Turntable Bearing | PALFINGER

    2011-8-26 · A tower crane set to weather vane properly will have its slew brakes released, the trolley pulled in close to the mast and the hook raised with no load Tower crane owners on the US Eastern seaboard are urged to ensure that their cranes are properly set to weather vane safely in light of Hurricane Irene forecast for this weekend (27 and 28 August).

    Get Price
  • SERVICE NEWS

    2020-3-27 · 1. About Rocking test (check of wear amount of slewing bearing) To grasp wear amount of slewing bearing, check the difference of incline (change of gap amount) of slewing bearing from upper limit (minimum reach ) to lower limit (max reach). In detail, please check attached procedure of rocking test. 2. Interval : Every 6 month

    Get Price
  • Guide to inspecting and maintaining cranes

    2020-3-30 · GUIDE TO INSPECTING AND MAINTAINING CRANES Component tested NDT description NDT frequency Slew ring bolts – slew rings Crack test bolts 5 years Boom chord thickness Material thickness testing 10 years Slew ring Crack test 10 years Hydraulic luffing cylinder gland nut Crack test 10 years Hydraulic luffing cylinder and ram-rod ends and caps

    Get Price
  • Slew Ring | Boltstress Ultrasonics

    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. Together with Leibherr and Lloyds of London we extended the statutory replacement period from 6 to 11 years.

    Get Price
  • Slewing bearings | SKF

    The bearing raceways, in conjunction with the rolling elements and cages or spacers, are designed to accommodate loads acting singly or in combination, and in any direction. SKF manufactures standard and customized slewing bearings in various designs, with outside diameters from 0,1 to 18 m to meet the demands of particular applications.

    Get Price
  • Survey and Examination of Ships’ Lifting Appliances

    2011-11-23 · • review rocking test/grease sampling data, where applicable (please refer ... stated by the ship’s flag administration. For deck cranes, derricks and engine room cranes, the surveyor will be required to ... Slew bearings and bolts - --Note Functional testing may be …

    Get Price
  • Slewing Drive,Slew Drive,Slewing Bearing Factory ...

    MA ANSHAN JING WEI SLEWING RING CO.,LTD. Is a national high-tech enterprise integrating Slewing drive、Slewing Bearing、Planetary reducer design、development and manufacturing,Anhui province equity management trading center 'specialized special new board' listed enterprises. The company is equipped with advanced CNC production lines ...

    Get Price
  • Offshore Cranes - NOV

    2017-7-14 · Shipboard cranes Luffing, knuckle-jib and telescoping-type shipboard cranes are designed for safe and accurate deck lifts on board ships and offshore installations, and cargo handling within harbours. The cranes are delivered with the appropriate safe working loads and various slew bearing dimensions and pedestal heights to accommodate

    Get Price
  • Logistics solutions for naval vessels - MacGregor

    2016-5-19 · 1.1.4.1 For lifting appliances covered by the class notation, Crane, see RU SHIP Pt.6 Ch.5 Sec.3 Permanently installed cranes – Crane. 1.1.5 Definitions, abbreviations, symbols and references 1.1.5.1 Accessories Load-bearing, not rigidly attached, interchangeable parts which may be integral components of lifting

    Get Price
  • DNVGL-ST-0377 Standard for shipboard lifting appliances

    ship and nothing herein shall prejudice the Club's rights under the insurance policy in the event of a dispute between the Club and the member relating to the condition of the ship. International Group of P&I Clubs - Ship Technical Committee Condition Survey Report - Version 9.00.00 - Date 24.07.2017

    Get Price