Section 2 Particulars to be submitted
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Special Service Craft, July 2022 - Part 11 Transmission Systems - Chapter 1 Gearing - Section 2 Particulars to be submitted

Section 2 Particulars to be submitted

Parent topic: Chapter 1 Gearing

2.1 Submission of information

2.1.1 At least three copies of the following plans and information as detailed in Pt 11, Ch 1, 2.2 Plans are to be submitted.

2.2 Plans

2.2.1  Gearing

  1. Cross sectional views indicating general arrangement.

  2. Detailed plans of elements.

2.2.2  Shafting and auxiliary systems

  1. Mass elastic schematic showing gear unit torsional data.

  2. Arrangements plan indicating bearing positions.

  3. Detailed plans indicating scantlings of shafts, couplings and bolting.

  4. Schematic plans of the lubricating oil system, together with pipe material, relief valve and working pressures.

  5. Schematic of the control and electrical system.

2.3 Information

2.3.1  Gearing:

  1. Operational power/speed envelope for each pinion.

  2. Number of teeth in each gear.

  3. Reference diameters.

  4. Helix angles at reference diameters.

  5. Normal pitches of teeth at reference diameters.

  6. Tip diameters.

  7. Root diameters.

  8. Face widths and gaps, where applicable.

  9. Pressure angles of teeth (normal or transverse) at reference diameters.

  10. Accuracy grade Q in accordance with ISO 1328 or an equivalent Standard.

  11. Surface texture of tooth flanks and roots.

  12. Minimum backlash.

  13. Centre distance.

  14. Basic rack tooth form.

  15. Protuberance and final machining allowance.

  16. Details of post hobbing processes, if any.

  17. Details of tooth flank corrections, if adopted.

  18. Case depth for surface-hardened teeth.

  19. Shrinkage allowance for shrunk-on rims and hubs.

  20. Type of coupling proposed for oil engine applications.

  21. Details of surface treatment.

  22. Additional measures, not covered by the Rules, taken during manufacture of the gear elements, to improve the load capacity of the gear teeth.

  23. Calculations for short term high power operation, where applicable, see Pt 9 General Requirements for Machinery.

  24. Failure mode effects analysis as required by Pt 9 General Requirements for Machinery.

  25. Specifications for carbon-manganese and alloy steel forging materials of pinions, pinion sleeves, wheel rims, gear wheels, couplings, bolting and all transmission shafting, giving chemical composition, heat treatment and mechanical properties.

2.3.2  Shafting and auxiliary systems:

  1. Details of clutch units, where fitted.

  2. Details of alarms and control systems, where fitted.

  3. Schematic plans of the lubricating oil system, together with pipe material, relief valve and working pressures.

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