NZJBRRA Steering Specifications 2020 Introduction

Page | 1 NZJBRRA Safety Cage Application for Endorsement Form T1 rev 0

NZJBRRA Steering Specifications 2020

Introduction

HELM Minimum Requirement for Steering Compliance Examples

Steering Wheel & Fixing

Manufactured Approved steering wheel with a minimum of six M5 or 3/16”-inch fixing bolts and or an approved quick release steering hub if fitted.


Steering shaft - Minimum of 16mmm or 5/8”-inch round shaft with splined or keyway drive connection. Must be steel or stainless-steel material (NO ALLOY OR ANY TUBE)

- Steering wheel Flange connection to be a minimum of 5mm material fully welded or an approved quick release hub connection.

Steering housing/column

- Minimum of 3mm wall thickness with minimum of 5mm flange connection.

Steering housing bearing/bushes

- Personal preference of Bearings OR Bushes (of suitable material) with a minimum of 10mm seating on steering column and steering shaft.


Drive section to cable (At Helm)

- Cotton reel approved design with minimum diameter of 75mm (3” inch) - MORSE style approved cable steering. - NO Chain and sprocket systems allowed


Cotton reel - Connection to shaft must be either keyway/splined and connected with locking device from cotton reel to shaft (i.e. Grub screws, fitted with Loctite thread locker)

- A Safety bolt or nut to be fitted at the end of the shaft to prevent Cotton Reel from coming off the end, correctly lock wired or nyloc nut.

- Steering cable to be one continuous section to the stern of the boat running in opposite directions with a locking device to cotton reel, with a minimum of 4 complete wraps around the reel.

Power Steering - Approved for use and must be able to operate without

power.


Steering Cable - Minimum of 4mm or 5/32” inch rated 7X19 strand Galvanised or S/S wire.

- No replacement service life. Inspected condition. - Approved MORSE style push pull cable.


Steering pulleys - Connected to hull by minimum of two M6 or ¼ inch fixings with nyloc nuts & 5mm or larger thickness backing plate.

- Pivot point bolt must have nyloc nut with a minimum of 3 threads exposed.

- Pulleys to be installed ensuring correct alignment with the cotton reel.

- Recommend the use of two single pulleys, spaced apart forward and aft so that the cables at the reel are not rubbing on the loop next to it, or trying to climb over the loop next to it.

- All double pulleys to have a “Safety Bolt” fitted to back side of pulley to stop cables from climbing out of the pulley. Ensure bolt cannot rub on safety bolt.


Transom Minimum Requirement for Steering compliance Examples

Turnbuckles - Minimum of 6mm approved fit for purpose turnbuckles. - Must have locking nuts. - All fittings must be Correctly lock wired at both ends of

turnbuckle. - Recommend Turn Buckle pins (if used) to be replaced

with S/S shanked cap screws with nyloc nuts and fitted with split pins below nyloc.


Wire Rope fixing - Must be used for wire termination and be correct to wire size.

- Primary clamping system to be wire rope crimp ferrules. - Copper crimp ferrules to be used and installed only with

correct tooling for crimp size. - Minimum of two compressions (crimps) on each Ferrule - - D-shackles to be approved fit for purpose and minimum

of 6mm diameter, with extended pin or shanked bolt with nyloc nut fitted. *

- All lock wiring completed to RRA standard (as in pictures) - Rope clamps (Bull Dog Clamps) may be used as a

secondary clamping system only (in conjunction with copper ferrules) BUT must not be able to foul on any objects through the entire movement of the steering lock to lock.

If Using Bull Dog Clamps, ensure the “U-BOLT” side is contacting the “Tail” NOT the main wire


Steering Pulleys - Steering pulleys to be installed to ensure correct alignment with the tiller arm and that there is sufficient cable separation.

- All double pulleys to have a “Safety Bolt” fitted to back side of pulley to stop cables from climbing out of the pulley. Ensure bolt cannot rub on safety bolt.

- Connected to hull by minimum of two M6 or ¼ inch fixings with nyloc nuts & 5mm or larger thickness backing plate.

- All Bolts must have nyloc nut with a minimum of 3 threads exposed.

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Pivot point steering - RRA approved steering systems or OEM (e.g., SSS, Keelowcraft)

- Transom box must be twin arm type. - All fittings must be Correctly lock wired or pinned.

Ensure no part of the steering system can foul on any other parts throughout the full travel of the steering lock to lock.

Twin steering arms - Approved S/S tube steering arms will comply provided they meet strict guidelines (min 1.6mm wall thickness, plug welded and seem welded solid plugs at each end with min 25mm shank inside the tube)

- Minimum of 16mm solid S/S or Steel, for non-tube arms. - NO ALLOY - Drilled and tapped with min of 10mm (metric fine) or 3/8

UNF thread for rose joint. - Minimum of 10mm (metric fine) or 3/8 UNF approved fit

for purpose rose joint with locking nuts (Ensure Rod ends do not bind at any point during full travel of steering lock to lock)

- Fixing to pivot steering and nozzle with minimum of 3/8” inch or 10mm fastenings with nyloc nuts.

- All fittings must be Correctly lock wired or fitted with pins to prevent nuts coming off


Nozzle - Fit for purpose snoot. - Minimum of 3/8” inch or 10mm pivot points fastenings. - All fittings must be Correctly lock wired or welded

Lock wiring - All fittings must be Correctly lock wired back to itself. - NO lock wire to be between separate moving fittings.


Swaged fittings - All Swage fittings must be completed by certified supplier with endorsement paperwork to be provided*.

- *Load testing certificates. (Bridon, Cooke’s or similar) - Terminology: Swage fittings are the inserted wire type

with crimp connections.


D Shackle Use Clarification

- D shackles can be used PROVIDED they are min 6mm, with a 6mm S/S shanked cap screw (to replace D shackle pin) or extended pin. The cap screw to be drilled through the head to allow for lock wire, and the tread to be long enough to allow for a nyloc nut to be used as a lock nut.

- NOTE: the cap screw must thread into the D Shackle. - It may NOT be a smaller thread that just passes through

the D shackle. - The recommendation for a Cap Screw and not a standard

bolt is that the head is much deeper making drilling a hole in it for lockwire easier.

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Documents

NZJBRRA Steering Specifications 2020 Introduction