Thanks Thanks:  0
Likes Likes:  0
Results 1 to 5 of 5

Thread: Changing prop hub diameter

  1. #1
    Team Member
    Join Date
    May 2013
    Location
    Apopka, Fl.
    Posts
    2
    Post Thanks / Like

    Default Changing prop hub diameter

    Can a solid brass prop have it's hub diameter increased from 1" to 1 1/4"? This is a solid brass inboard prop. No rubber hub.

  2. #2
    Team Member
    Join Date
    Jun 2005
    Location
    Eastern PA
    Posts
    661
    Post Thanks / Like

    Default

    You mean the shaft size? If so, I would think so without a stress problem. Prop makers make the hub for various sizes, including larger than only 1 inch.

    Jeff
    "We live at the bottom of an ocean of air." - General Marvage Slatington

  3. #3
    Team Member
    Join Date
    May 2013
    Location
    Apopka, Fl.
    Posts
    2
    Post Thanks / Like

    Default

    I have gone to a 1 1/4" shaft from a 1" shaft on a solid brass keyed inboard prop. Can the brass 1" hub be cut out to 1 1/4" with the existing key way?

  4. #4
    Team Member
    Join Date
    Jul 2013
    Posts
    233
    Post Thanks / Like

    Default

    If you will need to cut a new keyway after boring the hub to larger I.D, that can be something to question as far as possible stress cracking at that point. Factors to consider are.....

    - load: racing, towing, big boat? light boat? High horsepower and/or torque?

    -Material: is it just brass or is it nibral?

    -and Hub wall thickness, just to name a few.

    The safest bet would be to find a local or nearest propeller service shop and let them determine based on the following points.

  5. #5
    Team Member
    Join Date
    Jun 2005
    Location
    Eastern PA
    Posts
    661
    Post Thanks / Like

    Default

    Agreed, but understand that the prop manufacturer has that in mind when they designed the prop for a range of shaft diameters, one inch being about the minimal for that size prop, and 1 1/2 around the maximum.

    Jeff
    "We live at the bottom of an ocean of air." - General Marvage Slatington

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Prop diameter increase?
    By DuckLn in forum Technical Discussion
    Replies: 10
    Last Post: 11-27-2014, 10:38 AM
  2. changing propeller rake?
    By fs5 in forum Technical Discussion
    Replies: 30
    Last Post: 01-19-2013, 02:27 PM
  3. Changing carb jets
    By BRzuki in forum Technical Discussion
    Replies: 3
    Last Post: 04-17-2011, 06:43 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •