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slew ring bolts inspection

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  • Inspection and Maintenance of slewing bearing –

    2019-9-6 · Replacement of sealing device. Fixed bolt inspection. Bolt. Bolt connection is of great significance to the running safety and using life of slewing bearing, so it is necessary to tighten the bolt regularly. If the bolt is not in good condition, it must be replaced. Our service. Check initial stress of bolt.

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  • Slew Bolt Inspection (including non-destructive

    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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  • Slewing Rings - Technical Handbook - BALNEX

    When BTS was commissioned to service the slew ring bearings, they discovered faults in the previous techniques implemented for testing the bolts. They began with a full assessment of the bolts. Upon observing the issues present, they recommended a technologically-advanced means of servicing designed to: Improve the bearing accuracy and lifespan

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  • Slew Ring | Boltstress Ultrasonics

    Seal inspection The seals or sealing arrangements should be inspected at least every six months during normal maintenance. If necessary, clean the seals and if there are signs of damage, replace the seal to prevent any contaminants from entering the excavator swing ring bearing.

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  • Slewing Bearings Inspection - Loyal Slewing Crane

    2020-10-22 · applied to the bolt. This inspection shall be repeated annually at a minimum. If a loose bolt is discovered, replace the bolt and mating washer with new ones. The running condition of the slew bearing equipment should be evaluated during use. If excessive noise and vibration are observed, the equipment should be shut down for inspection

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  • Slew Bearing Installation and Maintenance Manual

    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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  • Slewing Ring Bolts & Special Lifting Fasteners -Energy

    2020-10-22 · Thread the bolts and washers, if required, into the slew drive, 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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  • 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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  • Slew Drive Installation and Maintenance Manual

    2020-10-22 · Thread the bolts and washers, if required, into the slew drive, 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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  • NBC Group :: Design, Installation & Maintenance

    In extreme cases of long term storage the bearings may need professional dismantling and cleaning inspection reassembly before use. Large slewing rings usually have lifting holes for eye-bolts to assist lifting in the inner and outer rings. Check the weight of the ring to ensure slings and/or chains are of sufficient capacity.

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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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  • 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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  • The life of slewing ring bearings - XZWD - slew

    2018-12-7 · To maximize bearing life, simply follow these tips — raceway and gear lubrication, torque checks on bolts, and seal inspection — and be alert for four warning signs of potential bearing problems. The material used for slewing ring bearing are normally 50Mn , 42CrMo and C45.

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

    The play, or clearance, in a slewing ring bearing is another important indicator of a problem. A new bearing is assembled with a specific amount of clearance to compensate for slight out-of-flatness encountered in a mounting structure. This clearance can increase dramatically due to wear.

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  • Slewing bearings - SKF

    2020-10-3 · 47 Inspection 49 Storage 51 Single row four-point contact ball slewing bearings 52 Product data – general ... c onsists of an inner ring (a), an outer ring ... incorporates a gear (e), are provided with holes (f) to accommodate attachment bolts. The holes may be threaded. Generally, only the raceways in the rings (h) are hardened and pr ...

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  • 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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  • Thorough examinations and inspections of lifting

    2021-2-27 · Further recommendations on inspection relating to cranes are given in BS 7121 British Standard Code of Practice for the Safe Use of Cranes. The various parts of this standard can be obtained from BSI. Lifting accessories do not normally need formal inspection, provided that proper pre-use checks are made and they undergo their standard thorough ...

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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.

    Get Price
  • Mechanical service - Certification ,Inspection,ROV

    Tension check slew ring bolts . Rocky Motion test slew ring . Callibrating of load cells . Hydr, hose change . General mechanical work. Launching appliances. Lifeboats and rescue boats. Onload Offload release gear

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  • Famous Wanda Slewing Ring Bearing for ... - slew

    Visually inspect the bolts on the slewing ring before each work or at least once a week; After the slewing bearing has just started working for 100 working hours, check whether the bolts are loose, check again in the 300th working hour; check every 500 working hours in the future; shorten the inspection interval in bad working conditions.

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  • Maintain – Slewing ring bearings, turntable bearings

    And carry out an inspection of the side clearance of tooth after the bolts are tightened. Tighten the bolts symmetrically in a direction of 180 degrees continuously to guarantee finally there is the same pre-tightening force in the bolts over the circumference.

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

    The play, or clearance, in a slewing ring bearing is another important indicator of a problem. A new bearing is assembled with a specific amount of clearance to compensate for slight out-of-flatness encountered in a mounting structure. This clearance can increase dramatically due to …

    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

    Get Price
  • NBC Group :: Slew Drive Installation

    Bolts. When fitting the slew drive, remove the shipping bolts, and mounting bolts to ISO Grade 10.9 should be used. If required, ask NBC Technical to check the bolt strength calculation. Flat washers of the appropriate size and strength may be used to reduce under bolt head pressure. Split or conical washers may not be used.

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  • Installation and Maintenance Instruction - Xuzhou

    Besides the inner and outer ring of a slewing bearing must rest fully on the supporting structure surface. Mounting elements selection; Choose bolts of recommended grade, quality class 10.9(metric) or SAE grade 8 bolts, Grade 12.9 bolts are only used in very rare circumstances.

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  • Ultrasonic Testing Services | Boltstress Ultrasonics

    The solution is to first ensure that all bolts have precisely the required bolt tension, and second to monitor the on-going relaxation. Early detection prevents catastrophic un-planned failure. Grinding Mills – Liner Bolting. Liner bolting has an extremely high failure rate; many sites live with failures and regularly replace bolts mid-campaign.

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  • Thorough examinations and inspections of lifting

    2021-2-27 · Further recommendations on inspection relating to cranes are given in BS 7121 British Standard Code of Practice for the Safe Use of Cranes. The various parts of this standard can be obtained from BSI. Lifting accessories do not normally need formal inspection, provided that proper pre-use checks are made and they undergo their standard thorough ...

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  • How to correctly install and maintain the slewing ring

    2018-11-15 · Third, regular inspection and maintenance of slewing ring bearing. Check the bolt preload torque for the first time using 100 working hours. If more than 10% of the bolts are loose, check again after the 200th working hour. It will be inspected every 500 working hours in the future; the inspection interval should be shortened in harsh conditions.

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  • Mobile Crane Inspection Report

    2020-6-3 · 7 Slew Ring bearing & Bolts Satisfactory. No anomalies noted. 8 Counterweight & Signage Clearly posted. 9 Brakes & Clutches (Wear Indicators) Satisfactory. 10 Pawl Brake Park and slew brakes, satisfactory. 11 Ropes (Terminations, Length) No kink or broken strand evident on both main & auxiliary ropes.

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  • Mechanical service - Certification ,Inspection,ROV

    Tension check slew ring bolts . Rocky Motion test slew ring . Callibrating of load cells . Hydr, hose change . General mechanical work. Launching appliances. Lifeboats and rescue boats. Onload Offload release gear

    Get Price
  • SLEWING DRIVE MANUAL - Nobis Industrial

    2020-10-19 · connection. This inspection shall be repeated annually. The inspection frequency may be reduced under special operating conditions. In case of loose bolts, replace all bolts and washers with new ones. 2.8.2 Lubrication and Mounting Bolts . There are three places which need to be lubricated, they are slewing ring raceway, worm thread and

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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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  • SLEW RING BEARING IN PNG - MIT GROUP

    2021-3-15 · slew ring bearing for deck crane in png MIT has delivered a new slewing ring bearing for Bailey deck crane on a cutter dredger and exchanged it in Papua New Guinea. The slewing ring bearing of the more than 35 year old deck crane appeared to have excessive play during an inspection and had to be replaced.

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  • Slew ring bearing - Quintette Coal Limited

    A slew ring bearing for coupling the superstructure of a large piece of heavy equipment to the base having an inner ring attachable to the underside of the superstructure and an outer ring having gear teeth on its outer cylindrical surface concentric with the inner ring and attachable to a stationary base frame.

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  • SAFETY PERMIT CONFERENCE CHECKLIST

    2021-3-29 · sections and slew-ring bolts, including retorquing after final assembly. A procedure for written verification of all slew-ring and tower section bolt torques to be maintained at the worksite or on the crane. A description of the relationship of the crane to the building under construction, including minimum clearances

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  • Safety Alert - IADC

    2020-2-2 · NEAR MISS – LOOSE CRANE RING BOLTS . WHAT HAPPENED: A crane boom slew was jamming while lifting medium loads. The boom, counterweight, winch, pedestal, lift cylinders and lower pedestal plate were removed for inspection. The rig crew discovered 30 loose bolts with another 30% of the bolts sheared off from contact with the inspection hole as ...

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

    2021-4-15 · If the wear is particularly serious or cracks are found at the raceway, the slewing ring assembly needs to be updated. In the process of the slewing ring maintenance and installation, the inspection and tightening of the strength bolts should be done in strict accordance with the requirements.

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  • SLEWING DRIVE MANUAL - Nobis Industrial

    2020-10-19 · connection. This inspection shall be repeated annually. The inspection frequency may be reduced under special operating conditions. In case of loose bolts, replace all bolts and washers with new ones. 2.8.2 Lubrication and Mounting Bolts . There are three places which need to be lubricated, they are slewing ring raceway, worm thread and

    Get Price
  • Mobile Crane Inspection Report

    2020-6-3 · 7 Slew Ring bearing & Bolts Satisfactory. No anomalies noted. 8 Counterweight & Signage Clearly posted. 9 Brakes & Clutches (Wear Indicators) Satisfactory. 10 Pawl Brake Park and slew brakes, satisfactory. 11 Ropes (Terminations, Length) No kink or broken strand evident on both main & …

    Get Price
  • Mechanical service - Certification ,Inspection,ROV

    Tension check slew ring bolts . Rocky Motion test slew ring . Callibrating of load cells . Hydr, hose change . General mechanical work. Launching appliances. Lifeboats and rescue boats. Onload …

    Get Price
  • Checking bolts - Cranes Today

    2007-3-8 · In January, the UK HSE warned crane users to check the high-tensile bolts that hold together tower cranes. This is a summary of that guidance. High tensile bolt connections are used on tower crane joints, including those on mast, jib and slew ring bearings.

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  • manufacturing and services | Bolt & Nut

    Slew Ring Bolts Socket Head Capscrews Square Head Bolts Swing Bolts T Head Bolts. Nuts. 12 Point Nuts Barrel Nuts Cap Nuts Castellated Nuts Cylinder Cover Nuts Flange Nuts ... MPI (Magnetic Particle Inspection) PMI (Positive Material Identification) Proof Load Stress Rupture Tensile UT (Ultrasonic Testing) Wedge Testing.

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  • 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 …

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  • SAFETY PERMIT CONFERENCE CHECKLIST

    2021-3-29 · sections and slew-ring bolts, including retorquing after final assembly. A procedure for written verification of all slew-ring and tower section bolt torques to be maintained at the worksite or on the crane. A description of the relationship of the crane to the building …

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  • s g n i r a eg Bn i w le S - Liebherr

    2021-5-8 · The current product range includes slewing ring bearings which may be single- or double-row four-point contact, triple-row roller or a combination of both ball and roller elements. In addition to standard types, a variety of customised and application specific special designs are available. Liebherr manufactures slewing bearings for a wide range

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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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