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  • Inspection and Maintenance of slewing bearing –

    2019-9-6 · We do None gear, Internal & External gears, ring gears, rings, slewing ring bearings and other forging parts for different fields. To save your significant time and effort, we create the drawing and graph for the normal standard slewing bearing.

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  • Slewing Bearings Inspection - Loyal Slewing Crane

    at least 20% of the bolts of a single ring are found to have less than 80% of the prescribed preload, then all the bolts must be replaced. Never loosen or exchange more than one bolt at a time. Use the same tightening method, the same tools and the same type of bolts employed originally. Seal inspection

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  • Slewing Rings - Technical Handbook - BALNEX

    2012-1-17 · Slewing Ring Inspection in Operation Page 25 25 25 26 26 26 27 ... PSL, a.s., PovaÏská Bystri ca is a produ-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. ... and fixing bolts. of the slewing ring in ...

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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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  • Slewing Ring Bolts & Special Lifting Fasteners -Energy

    Energy Bolting is a special bolting supplier with a focus on high tensile, performance critical, fully tested and certified slew ring fasteners and crane bolting. ISO 898-1 Grade 8.8, ISO 898-1 Grade 10.9, ISO 898-1 Grade 12.9

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  • Check those bolts - Cranes Today

    2008-7-8 · The first thing I did when I got to the 450ft-high top of a 2003 tower crane was to check the slew-ring bolts with a 2lb beater using minimum force. There are two rows, each with 59 bolts. With the crane balanced off, I started with the top row (the slew bearing) and when I struck the third bolt it moved, showing it was loose.

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  • Slew Bearing Installation and Maintenance Manual

    2020-10-22 · Thread the bolts and washers, if required, into the slew bearing, hand tightening each bolt. Tighten one ring at a time. You can start with the inner ring or outer ring but you must follow the tightening procedure until the full tightening torque has been reached before moving to the next ring.

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  • Bearing inspection and maintenance | thyssenkrupp

    Slewing bearings are safety-relevant wear parts. Consequently, they must be checked regularly. The specified wear limits must not be exceeded. We use application-related measurement methods. The history of the inspection results gives a trend behavior that is taken into account in the maintenance concept and spare parts management.

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  • Repair & Maintenance of slewing bearing – Slewing

    2020-3-10 · Regular inspection and examination of bolt connections 8. High tensile connections are regularly inspected by a competent person to check that pre-load on the bolts has not been reduced. Loss of pre-load can result in movement of the joint under load. The frequency of inspection should be in accordance with the manufacturer’s instructions.

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  • GUIDE TO INSPECTING AND MAINTAINING CRANES –

    2018-10-18 · Once removed, slew ring bolts should be replaced unless the manufacturer’s instructions state they can be reused. If bolts can be reused they should be tested. For tower cranes where the slew ring needs to be split each time the crane is moved, NDT 10 per cent of slew ring bolts is suggested. Bolts to be tested should be selected from the ...

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  • Guide to inspecting and maintaining cranes

    2020-3-30 · 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 not have to be stripped down in the major inspection. The competent person should still

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  • Mitsubishi crane slewing bearing changeout

    2016-9-6 · Slewing motor disconnected and mounting bolts removed to allow the pinion to rotate freely. Jib removed by barge crane. Crane house slung and top slew bolts removed from the bearing. Old bearing slung and removed using the dock crane. Inspection of slew ring carried out. New slewring fitted and bolts torqued. Slip ring and wiring replaced.

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  • HMK Harbour Crane Maintenance in UK Port | Alatas

    2021-1-25 · Slew ring grease distribution system inspection; Slew ring bearing greasing; ... the team switched on the isolator and ran the engine for a few minutes then re-check and top up the coolant then run the engine up to normal operating temperature 80-85°. ... Inspect and identify the travel axle bolts strut bolts.

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  • Phased Arrays for Detecting Cracking in Bolts

    2008-12-7 · INSPECTION TECHNIQUE In the phased array inspection of bolts, the array is mounted in a jig on the top of the bolt (see Figures 2 & 3). The array is either in direct contact with the bolt, or uses a normal beam wedge. If in direct contact, a protective layer is …

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  • Final inspection – Clyde Fasteners

    2015-1-2 · Originally founded in 1965, our organisation has developed significantly by organic growth, both in personnel and product, with strategic direction to be one of the UK's main players in the sector.

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  • A tower crane letter | Vertikal.net

    2008-2-6 · Before going to work at 5:15am I watched the news on the most recent NY crane accident and it was immediately apparent to me that the Slew-ring assembly had failed. The first thing I did when I got to the top of the 450ft (136m) of 2003, tower crane was check the slew-ring bolts …

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  • CHRISTIE PACIFIC CASE HISTORY: KOBELCO SLEW

    2021-5-13 · excavator slew ring bearing removed,reconditioned, and replaced. This old girl presents her self at the workshop with a great deal of free-play between the undercarriage and the top of the machine. Close examination reveals that the slew bearing has lost the plot.

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  • CONTENTS

    2018-11-8 · H1 mm Ring height H2 mm Ring height Hu mm Distance at the bottom Outer ring inner ring Ho mm Distance at the top Outer ring inner ring d mm Gear P.C.D. m mm Module z - Number of teeth x.m mm Addendum modifi cation (profi le shift) b mm Tooth width T Weight t mm thread depth Zu mm Diameter ˚ m/s Speed hu mm tooth height F a kN Resultant ...

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  • thyssenkrupp rothe erde Germany GmbH

    thyssenkrupp rothe erde Germany GmbH. Whether with solutions for passenger transport or materials for state-of-the-art architecture, we actively participate in the shaping of tomorrow’s cities.

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  • Slewing Crane Archives - Loyal Slewing Crane Bearing

    The most important data for the crane slew ring selection is 1. Application 2. Loadings for raceway and bolts 3. Gearing loadings 4. Installation space 5.Operating conditions Crane Slew Ring Optimum solution solution will be found in close cooperation crane slew ring The maximum load must be determined according to the … Read more

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  • Slew Drive nstallation and Maintenance Manual

    2017-3-1 · • Remove the shipping bolts. Do not remove the shoulder bolts or the Allen bolts that fix the top plate and the housing to the slewing ring. • With a gauge, check whether the Slew drives supporting surfaces of fully are supported by the mounting structure. • The Slew drive shall be mounted in an unloaded condition.

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  • Phased Arrays for Detecting Cracking in Bolts

    2008-12-7 · INSPECTION TECHNIQUE In the phased array inspection of bolts, the array is mounted in a jig on the top of the bolt (see Figures 2 & 3). The array is either in direct contact with the bolt, or uses a normal beam wedge. If in direct contact, a protective layer is …

    Get Price
  • Dokka Fasteners CRANES

    2016-2-11 · Our specialty is slew-ring bolts manufactured on our fully automated robotic production cells, hardened in-house and supplied complete with 3rd party inspection to satisfy the lifting appliance requirements of certification bodies as DNV, Lloyds and ABS among others. Further separating ourselves from the competition, we

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  • Final inspection – Clyde Fasteners

    2015-1-2 · Originally founded in 1965, our organisation has developed significantly by organic growth, both in personnel and product, with strategic direction to be one of the UK's main players in the sector.

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  • IP 12 Wheelspin - Inclusive-Play

    2021-2-18 · 3 1 Slew Ring Bearing 4 1 2102-TF Top Frame 5 3 2102-FQ Floor Quadrant ... roundabout by removing bolts on top part of bearing. Place wheelspin base frame (outer ring) into centre excavation, making sure the ring is central with edging ... Locate the inspection hatch underneath the …

    Get Price
  • Specification for Lift and Hoisting Equipment Inspection ...

    2018-11-14 · 5.8 General Requirements of Eye bolts ..... 15. Effective: Petroleum Development Oman LLC Revision: 0 Oct 18 Page 6 SP-2275 Specification for Lifting and ... Crown block, travelling block and top drive systems. Inspection criteria are covered by SP-2234 for well operations.

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  • 4. MAINTENANCE MANUAL - Oriental Inspection &

    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 …

    Get Price
  • CONTENTS

    2018-11-8 · H1 mm Ring height H2 mm Ring height Hu mm Distance at the bottom Outer ring inner ring Ho mm Distance at the top Outer ring inner ring d mm Gear P.C.D. m mm Module z - Number of teeth x.m mm Addendum modifi cation (profi le shift) b mm Tooth width T Weight t mm thread depth Zu mm Diameter ˚ m/s Speed hu mm tooth height F a kN Resultant ...

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

    2016-3-17 · Southwark Crown Court was told sections of the tower crane separated when 24 bolts failed due to metal fatigue. The bolts were on the crane's slew ring, which connected the mast to the slew turret, allowing the arms of the jib to rotate 360 degrees. When the bolts failed the slew turret and jib separated from the mast and fell off.

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  • Large-Diameter Anti-Friction Slewing Rings

    2017-4-14 · ring performance. Preventative Maintenance Programs Rotek offers a contracted pre-ventative maintenance program that provides regular inspection of your in-service slewing ring and the performance of sched-uled maintenance procedures that can keep your slewing ring in peak condition and extend its service life. In-Use Slewing Ring Analysis

    Get Price
  • SJ-P-32 Management of Cranes & Lifting - DRAFT 1409

    2015-3-2 · 3.3.6 Slew Ring Bolt Checks Ensure all slew ring bolts are checked for the correct torque prior to first erection on site and are visually checked, where possible, thereafter. 3.3.7 Security & Signage Unauthorised access to tower cranes shall be prevented by installation of a 2.4m high

    Get Price
  • IP 12 Wheelspin - Inclusive-Play

    2021-2-18 · 3 1 Slew Ring Bearing 4 1 2102-TF Top Frame 5 3 2102-FQ Floor Quadrant ... roundabout by removing bolts on top part of bearing. Place wheelspin base frame (outer ring) into centre excavation, making sure the ring is central with edging ... Locate the inspection hatch underneath the …

    Get Price
  • Specification for Lift and Hoisting Equipment Inspection ...

    2018-11-14 · 5.8 General Requirements of Eye bolts ..... 15. Effective: Petroleum Development Oman LLC Revision: 0 Oct 18 Page 6 SP-2275 Specification for Lifting and ... Crown block, travelling block and top drive systems. Inspection criteria are covered by SP-2234 for well operations.

    Get Price
  • 4. MAINTENANCE MANUAL - Oriental Inspection &

    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 …

    Get Price
  • Suspended Access Equipment Guidelines - SAFed

    2018-2-13 · d) Slew ring(s) and winch mounting unit(s) e) Luffing screw(s) and assessment of wear of leadscrew nut(s) f) Derricking devices and attachments g) Jib structure, attachments and pulleys for corrosion, physical damage, alignment and weld defects h) Testing for correct function, limit switches/devices to all motions

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  • thyssenkrupp rothe erde Germany GmbH

    thyssenkrupp rothe erde Germany GmbH. Whether with solutions for passenger transport or materials for state-of-the-art architecture, we actively participate in the shaping of tomorrow’s cities.

    Get Price
  • API 2C (2004)—Specification for Offshore Pedestal

    2017-10-1 · Where bolts of higher strengths than permitted by ASTM A 320/A 320M are desired, the materials shall meet the specifications in SAE J429 and ANSI B18.2.1. Qualification of the higher strength material shall be by testing of two threaded fasteners from each heat of steel for proof of mechanical strength, hardness, and Charpy impact energy values.

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  • Welcome to Rotek Inc.

    Home. ORGANIZATIONAL SCOPE. Rotek Incorporated, a thyssenkrupp company and member of the thyssenkrupp rothe erde group, is the North American leading manufacturer of slewing bearings (including ball and roller slewing bearings and wire-race slewing bearings). Furthermore, Rotek is a market leader for seamless forged steel and non-ferrous metal rings. ...

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  • KOMATSU PC138USLC OPERATION & MAINTENANCE

    Page 1 20001 SERIAL NUMBERS and up PC138USLC- 20001 NOTICE Komatsu has Operation & Maintenance Manuals written in some other languages. if a foreign language manual is necessary, contact your local distributor for availability. WARNING Unsafe Use of this machine may cause serious injury or Death.Operators and maintenance personnel must read

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  • Large-Diameter Anti-Friction Slewing Rings

    2017-4-14 · ring performance. Preventative Maintenance Programs Rotek offers a contracted pre-ventative maintenance program that provides regular inspection of your in-service slewing ring and the performance of sched-uled maintenance procedures that can keep your slewing ring in peak condition and extend its service life. In-Use Slewing Ring Analysis

    Get Price
  • SJ-P-32 Management of Cranes & Lifting - DRAFT 1409

    2015-3-2 · 3.3.6 Slew Ring Bolt Checks Ensure all slew ring bolts are checked for the correct torque prior to first erection on site and are visually checked, where possible, thereafter. 3.3.7 Security & Signage Unauthorised access to tower cranes shall be prevented by installation of a 2.4m high

    Get Price
  • IP 12 Wheelspin - Inclusive-Play

    2021-2-18 · 3 1 Slew Ring Bearing 4 1 2102-TF Top Frame 5 3 2102-FQ Floor Quadrant ... roundabout by removing bolts on top part of bearing. Place wheelspin base frame (outer ring) into centre excavation, making sure the ring is central with edging ... Locate the inspection hatch underneath the …

    Get Price
  • 4. MAINTENANCE MANUAL - Oriental Inspection &

    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 …

    Get Price
  • Specification for Lift and Hoisting Equipment Inspection ...

    2018-11-14 · 5.8 General Requirements of Eye bolts ..... 15. Effective: Petroleum Development Oman LLC Revision: 0 Oct 18 Page 6 SP-2275 Specification for Lifting and ... Crown block, travelling block and top drive systems. Inspection criteria are covered by SP-2234 for well operations.

    Get Price
  • The Georgia Tech Woodbury Research Facility

    slew speed results in an azimuth tracking 'keyhole,' or zenith blind spot, of about 1.5 ø for celestially sta- tionary targets. This corresponds very nearly to the maximum safe elevation the ante•ma may attain. The slower slew rate does unfortunately increase our target acquisition time by …

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  • API 2C (2004)—Specification for Offshore Pedestal

    2017-10-1 · Where bolts of higher strengths than permitted by ASTM A 320/A 320M are desired, the materials shall meet the specifications in SAE J429 and ANSI B18.2.1. Qualification of the higher strength material shall be by testing of two threaded fasteners from each heat of steel for proof of mechanical strength, hardness, and Charpy impact energy values.

    Get Price
  • OPERATOR'S MANUAL - Kubota

    2018-3-26 · OPG (Top Guard Level I) by welding, drilling, bending, grinding or cutting, as this may weaken the structure. If any component is damaged, replace it. Do not attempt repairs. If the ROPS/OPG (Top Guard Level I) is loosened or removed for any reason, make sure all parts are reinstalled correctly. Tighten mounting bolts to proper torque. 4.

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  • POWERED ACCESS N WARNING ! TS MA

    2019-2-24 · top corner of each page can also be used as a quick guide. SPECIAL INFORMATION Indicates the hazard or unsafe practice will result in severe injury or death. Indicates the hazard or unsafe practice could result in severe injury or death. Indicates the hazard or unsafe practice could result in minor injury or property damage. Notes: Give helpful ...

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  • Swing gear grease | Heavy Equipment Forums

    2018-10-14 · The swing machinery box comes out the top. There is a ring of bolts on the base of the component. Take the swing motor off the top of the box. You will likely have to pull the hoses off the motor to get it out because there isn't any room on those machines. The gears are not a problem if they haven't broken and the box hasn't stopped moving.

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