Topic: propellor supplier....any ideas? (Read 4910 times)

das boot · « **on:** October 16, 2009, 06:45:06 pm »

Chaps, I'm after a seven bladed scimitar prop in brass, 30mm diameter, threaded for a 4BA shaft...all I can find are M4 threaded. Any ideas as to where I might find such a thing?

Rich

HS93 (RIP) · « **Reply #1 on:** October 16, 2009, 07:27:57 pm »

prop shop will do eather m4 will go on 4ba no problem just a bit slack.

Peter

barriew · « **Reply #2 on:** October 16, 2009, 07:47:09 pm »

I think Prop Shop do have 4BA taps, but can also confirm that you can use M4.

Barrie

Peterm · « **Reply #3 on:** October 16, 2009, 08:07:20 pm »

Try George Sytek. Pete M

das boot · « **Reply #4 on:** October 16, 2009, 08:09:11 pm »

I did try a M4 prop on the shaft chaps, but there's no way it would ever stay on, even with copious amounts of Loctite...I contacted the shaft manufacturer who confirmed it's a 4BA thread and therefore needs a 4BA prop.

Aren't Prop Shop the ones who never reply to emails or phone calls, or am I thinking of someone else?

Rich

das boot · « **Reply #5 on:** October 16, 2009, 08:11:12 pm »

Pete, must have crossed posts with you...I'd forgotten all about G.Sitek, he was the man who made my 7 bladed scimitar for the USSBN Patrick Henry, under his old name.

Good man, thanks for that!

Rich

Peterm · « **Reply #6 on:** October 16, 2009, 08:11:21 pm »

That should read `George Sitek`. Pete M

HS93 (RIP) · « **Reply #7 on:** October 16, 2009, 08:13:05 pm »

Quote from: U-33 on October 16, 2009, 08:09:11 pm

I did try a M4 prop on the shaft chaps, but there's no way it would ever stay on, even with copious amounts of Loctite...I contacted the shaft manufacturer who confirmed it's a 4BA thread and therefore needs a 4BA prop.

Aren't Prop Shop the ones who never reply to emails or phone calls, or am I thinking of someone else?

Rich

No

and if it is 4ba it will fit so it's not 4ba

peter

Peter Fitness · « **Reply #8 on:** October 16, 2009, 10:29:47 pm »

I can highly recommend George Sitek, I ordered some props from him and they were here in Australia within a few days.

Peter.

brianc · « **Reply #9 on:** October 17, 2009, 12:08:38 am »

Yep ...order all my props from George...no job too big or too small and a real gent

das boot · « **Reply #10 on:** October 17, 2009, 07:21:30 am »

Thank you gentlemen....by popular request, Mr Sitek will be receiving an order from me and my cash.

Rich

HS93 (RIP) · « **Reply #11 on:** October 17, 2009, 07:26:03 am »

I would order a new 4ba inner shaft if m4 is to sloppy it sounds like it is worn or badly cut..

Peter

funtimefrankie · « **Reply #12 on:** October 17, 2009, 08:15:56 am »

I have a 4BA shaft that won't take 4mm props, thinking about changing it to metric

HS93 (RIP) · « **Reply #13 on:** October 17, 2009, 12:32:34 pm »

I have a couple of radstock shafts that are 4ba and m4 go on nice not sloppy at all but the 4ba props wont go on m4 without damaging the thread.. I am only using prop shop props so they may be a better tolerance.

Peter

das boot · « **Reply #14 on:** October 17, 2009, 01:21:49 pm »

Well, this is most strange...my shaft is threaded for 4BA props, the propellor that came with the kit fits perfectly(and I'm assured that it is 4BA by the kit manufacturers) as do a couple of other old 4BA props I have. I've even gone down to the shop down the road and bought a handful of 4BA nuts...all fit perfectly, so I'm pretty sure the shaft size is correct at 4BA.

I have four other brass props threaded M4, all from SMC, and all marked M4 on the original packet...the fit on the 4BA shaft is likened to throwing a banana up Fleet Street, ie; it fits where it touches and it don't touch much!

I've emailed GSitek, and I'll send him the shaft to ensure that the prop he makes fits it properly. I'll keep you all informed....

Rich

barriew · « **Reply #15 on:** October 17, 2009, 02:12:35 pm »

I think you will find that George only does metric sizes. I tried to get a 4BA from him, and that's how I found out that you can use M4 on 4ba

If he is doing BA sizes now, please post on here - I always use George as I'm one of those people that Prop Shop never reply to

The shaft was an early Deans Marine one - I think they've gone metric now.

Barrie

derekwarner · « **Reply #16 on:** October 17, 2009, 02:56:33 pm »

sorry

....4BA = 0.1420" diameter = 3.6 mm diameter & BA thread form is 47.5 degrees........

M4 = 4.0 mm diameter & is a 60 degree thread form

.....the two are not the same ..............Derek

HS93 (RIP) · « **Reply #17 on:** October 17, 2009, 02:59:51 pm »

Quote from: derekwarner_decoy on October 17, 2009, 02:56:33 pm

sorry ....4BA = 0.1420" diameter = 3.6 mm diameter & BA thread form is 47.5 degrees........

M4 = 4.0 mm diameter & is a 60 degree thread form .....the two are not the same ..............Derek

But Derek you threads are upside down in AUS

Peter

HS93 (RIP) · « **Reply #18 on:** October 17, 2009, 03:02:43 pm »

wht not get two bushes for a quid and a m4 shaft and then you will be up to date and have no problem getting props and swaping them to other boats.

Peter

derekwarner · « **Reply #19 on:** October 17, 2009, 03:15:09 pm »

yes Peter......when we in OZ order taps & dies...we specify that they are for use ...south of the border

....& they turn up ...upside down but OK for use down here

Micrometers & vernier calipers have not been invented yet in OZ......

but we still seem to be able to gauge the difference between 3.6 mm diameter & 4.0 mm diameter just by sight or feel!

- Derek

das boot · « **Reply #20 on:** October 17, 2009, 03:27:25 pm »

ooh....

Rich

das boot · « **Reply #21 on:** October 21, 2009, 08:51:19 pm »

Had an email from George Sitek earlier, he's custom building me a prop to my specs....threaded 4BA. Top man...

Rich

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Author Topic: propellor supplier....any ideas? (Read 4910 times)

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