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MARINE PROPELLER JPROP Use And Maintenance Handbook

Variable pitch propellers
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ELICHE A PASSO VARIABILE
Manuale d'uso e manutenzione
VARIABLE PITCH PROPELLERS
Use and maintenance handbook

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Summary of Contents for MARINE PROPELLER JPROP

  • Page 1 ELICHE A PASSO VARIABILE Manuale d’uso e manutenzione VARIABLE PITCH PROPELLERS Use and maintenance handbook...
  • Page 2 We are pleased to give you some general information and the technical instructions for its assembly, use and servicing. • "JPROP" has been created by the twenty-years experience of Cober, a precision mechanical industry which as come famous in its field. Every detail is built with the best materials and processed on CNC working centre.

  • Page 3: Table Of Contents

    IINDEX Section 1 - Taper check Page 2 - Key check 3 - Threading’s length of the shaft 4 - Tightening the lock nut 5 - Installing the propeller on the shaft 6 - Removing the propeller from shaft 7 - Pitch adjustment 8 - Maintenance 9 - Spare parts Note...

  • Page 4: Taper Check

    Section 1 - TAPER CHECK It is very important to check that the propeller taper perfectly matches the taper of the boat's shaft. You can easily check this by removing the key before installing the propeller.

  • Page 5: Key Check

    Section 2 - KEY CHECK This check avoid serious damage to the propeller. Make sure that the key: 1 - is at least 8 mm (5/16") away from the aft side of cone; 2 - does not touch the upper or the aft side of keyway of the propeller ;...
  • Page 6 Put the propeller on the shaft without the key. 1 - Screw on the main nut (see point 5.6) 2 - mark the front limit of the propeller on the shaft. After final installation the propeller must reach the same mark.

  • Page 7: Threading's Length Of The Shaft

    Section 3 - THREADING’S LENGTH OF THE SHAFT While tightening the retaining nut make sure that: 1 - it doesn’t meet with a strong resistance 2 - the threading of the shaft doesn’t bottom out in retaining nut 3 - the cones of the shaft and of the propeller match perfectly Allen key type "A"...

  • Page 8: Tightening The Lock Nut

    Section 4 - TIGHTENING THE LOCK NUT For a good working of the lock nut system it is necessary to take some precautions. While tightening the lock nut make sure that it turns: 1 - not less than the minimum figure listed in the table 2 - not more than the maximum figure listed in the table Allen key type "B"...

  • Page 9: Installing The Propeller On The Shaft

    Section 5 - INSTALLING THE PROPELLER ON THE SHAFT To install the propeller on the shaft proceed as follows: 1 - remove the zinc anode with the Allen key type "B" and the bronze ring with the Allen key type "C" (see table 3 of section 6).
  • Page 10 controdado lock nut 3 - pull down the Allen key and pull out the lock nut. 4 - check the cone, the key and the thread as suggested in section 1 - 2 -3 5 - insert the key on the shaft...
  • Page 11 6 - put the propeller on a shaft. (We advise to use locktite on a thread) 7 - tighten the retaining nut with the Allen key type "C" and with the help of a metal tube 30/40 cm (12/16") long. 8 - check that the propeller reaches the same position on the shaft as marked before (see section 1).
  • Page 12 controdado ock nut 9 - tighten the lock nut with Allen key type "B" checking the values listed in table 2. 10 - adjust, if necessary, the pitch of the propeller. (see section 7) 11 - install on the propeller the bronze ring (Allen key type "C") and the zinc anode (Allen key type "B").

  • Page 13: Removing The Propeller From Shaft

    Section 6 - REMOVING THE PROPELLER FROM SHAFT Proceed as follow in order to remove the propeller from the shaft: 1 - remove the anode (Allen key type "B", table 3) and the bronze ring (Allen key type "C"). 2 - insert the Allen key type "B" in the lock nut and turn it counter-clockwise until it’s completely free.
  • Page 14 controdado ock nut 3 - pull down the Allen key and pull out the lock nut. 4 - insert the Allen key type A in the retaining nut and turn it counter-clockwise with the help of a metal tube 30/40 cm (12/16") long.

  • Page 15: Allen Keys To Be Used

    5 - when the retaining nut is loose remove the propeller from the shaft Table 3 Allen keys to be used when installing or removing a propeller: hub dia key "A" key "B" key "C" key "D"...

  • Page 16: Pitch Adjustment

    Section 7 - PITCH ADJUSTMENT It’s possible to adjust the pitch anytime following these procedure: 1 - pull the cone of the propeller backward (the 4 projecting balls help the holding of the hand) If the ogival nose doesn't move enough to be free to turn follow the next steps.
  • Page 17 6 - turn the ogival nose towards the "R" or "L" side depending on the type of the engine (rightway or leftway) and reach the notch of the desired pitch. 7 - release the ogival nose. 8 - make sure that the reference line "0" matches the desired notch. 9 - make sure that the ogival nose backs itself firmly against the props body.

  • Page 18: Tables Of The Propeller Pitch

    Calculation of the slip: The following tables give the theoretical value of the pitch. To obtain the real value multiply the datum being examined by a reduction factor of 0.55. E.g.: propeller body 63, Ø 16", adjusted to the 10th step. Theoretical pitch *24.655"/rot.
  • Page 19 Calculation of the slip: The following tables give the theoretical value of the pitch. To obtain the real value multiply the datum being examined by a reduction factor of 0.55. E.g.: propeller body 83, Ø 19", adjusted to the 10th step. Theoretical pitch *25.926 "/rot.
  • Page 20 Calculation of the slip: The following tables give the theoretical value of the pitch. To obtain the real value multiply the datum being examined by a reduction factor of 0.55. E.g.: propeller body 93, Ø 24", adjusted to the 10th step. Theoretical pitch *28.254 "/rot.
  • Page 21 Calculation of the slip: The following tables give the theoretical value of the pitch. To obtain the real value multiply the datum being examined by a reduction factor of 0.55. E.g.: propeller body 116, Ø 28", adjusted to the 10th step. Theoretical pitch *28.024 "/rot.

  • Page 22: Maintenance

    30” 31” 32” 2,907 3,004 3,101 5,821 6,015 6,209 8,745 9,036 9,328 11,686 12,076 12,465 14,065 15,138 15,627 17,642 18,230 18,818 20,669 21,358 22,047 23,738 24,529 25,320 26,854 27,749 28,644 30,026 31,027 32,028 33,260 34,369 35,478 36,566 37,785 39,004 39,952 41,284 42,616 43,428...
  • Page 23 Section 8 - MAINTENANCE The "JPROP" propeller needs very little maintenance. Periodic maintenance, as described below, however will help you achieve best performance, both in efficiency as well as durability. Regular maintenance Periodically replay the zinc anode in order to avoid damage due to corrosion.

  • Page 24: Spare Parts

    Greasing 1 - unscrew the Allen screw under the red point (Allen key type "D", table 3, section 6). 2 - fill the propeller hub with marine grease ( grease suggested: Polimar 400 ) using the grease gun. 3 - replace the Allen screw in the propeller and seal with silicon sealer.
  • Page 25 Section 9 - SPARE PARTS HUB dia 63 mm 0.20 0.10 0.21 3.55 5.01 2.05 2.10 9.20 7.30...
  • Page 26 Spare parts list for propeller hub dia 63 mm Ref. Description Codex JP Hub sector 63,00,00 0,10 Allen screw UNI 5927 M6x8 pc A4 63,00,10 0,20 Allen screw TCE UNI 5931 M6x20 A4 63,00,20 0,21 Washer DIN 7980 M6 A4 63,00,21 Conical junction 63,01,00...
  • Page 27 HUB dia 83 mm 0.20 0.10 0.21 3.60 5.01 2.05 2.10 9.20 7.30...
  • Page 28 Spare parts list for propeller hub dia 83 mm Ref. Description Codex JP Hub sector 83,00,3P 0,10 Allen screw UNI 5927 M6x8 pc A4 83,00,10 0,20 Allen screw TCE UNI 5931 M6x20 A4 83,00,20 0,21 Washer DIN 7980 M6 A4 83,00,21 Conical junction 83,01,00...
  • Page 29 HUB dia 93 mm 0.20 0.21 0.10 0.22 0.23 3.65 5.01 2.05 2.10 9.20 7.35...
  • Page 30 Spare parts list for propeller hub dia 93 mm Ref. Description Codex JP Hub sector 93,00,3P 0,10 Allen screw UNI 5927 M6x8 pc A4 93,00,10 0,20 Allen screw TCE UNI 5931 M6x20 A4 93,00,20 0,21 Washer DIN 7980 M6 A4 93,00,21 0,22 Allen screw TCE UNI 5931 M8x22 A4...
  • Page 31 HUB dia 116 mm 0.25 0.21 0.10 3.80 5.01 2.05 2.10 9.20 7.35...

  • Page 32: Note

    Spare parts list for propeller hub dia 116 mm Ref. Description Codex JP Hub sector 116,00,3P 0,10 Allen screw UNI 5927 M6x8 pc A4 116,00,10 0,21 Washer DIN 7980 M8 A4 116,00,21 0,25 Allen screw TCE UNI 5931 M8x25 A4 116,00,25 Conical junction 116,01,00...
  • Page 33 Pitch regualtion: notch pitch maximum maximum number R.P.M. speed NOTE: ( Take note on these pages the regulations and the servicing maturities of Your "JProp" propeller )
  • Page 34 NOTE: ( Take note on these pages the regulations and the servicing maturities of Your "JProp" propeller )
  • Page 35 1855 A Industrial Blvd. - Laval (Qc) - Canada Tel. : +1 450 668 3111 (Canada) +1 800 300 3113 (USA) Fax : +1 450 668 6270 www.bomon.com/jprop - e mail: bomon@odyssee.net France: MAUCOUR - FRANCE 05 rue de la Dutée - CP1202 - 44806 Saint Herblain Cedex Tel.

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