HPST 2020 Jet Engine

[dieselguy86]

Hi Andy,

What size shaft and bearings did you end up using?

-Joe

[praendy2203]

Hi Joe,

the shaft diameter is 32,5 mm in the middle section.

I use hybrid angular contact bearings and 2 spring washers.
In the front 3Kg force and on the back 4 Kg force.

The dimensions are 17 mm ID
35 mm OD
10 mm thick.

Andy

[ripp]

Nov 1, 2021 9:57:32 GMT -5 praendy2203 said:

Hi Joe,

the shaft diameter is 32,5 mm in the middle section.

I use hybrid angular contact bearings and 2 spring washers.
In the front 3Kg force and on the back 4 Kg force.

The dimensions are 17 mm ID
35 mm OD
10 mm thick.

Andy

How can I imagine that?

do you have a picture or a drawing?

I only know a tension to the front or to the back.

forward is preferred



www.youtube.com/watch?v=d4_Jc4kRP54

regards

Ralph

[dieselguy86]

Thanks Andy, I used your shaft program (once I converted it to English) and found I need a 20mm shaft. Was hoping to use 61900 bearings (10x22x6).

[praendy2203]

Happy new year all😊

Andy

[praendy2203]

[jetjeff]

Hi Andy,

Quite an impressive employment collage spanning 12 years. Sounds like the job anybody in this forum would love to have.

There are undoubtably parts on these aircraft we at Blevins Screw Products manufactured.

I worked at VW0A from 1979 to 1992 in the I.T. department. VW owned a Beechcraft Kingair and Rockwell Sabreliner for executive flights. VW was an outstanding company to work for.

Let us know the next company you work for.

Happy New Year

Jeff

[racket]

Hi Andy

A Happy New Year to you :-)

You do a great job with your videos , nicely put together , may the new job be as enjoyable .

Cheers
John

[praendy2203]

Hi all, from Germany

Time to convert my garage to a workshop.
Still some smaller machines missing, but I started with a "big toy"😉

Andy

[racket]

Hi Andy

LOL......a good first machine , you've "set the bar" nice and high for the rest of them :-)

Heh heh , I guess you intend doing some precision work "between centres" ;-)

Cheers
John

[slittlewing]

Just a small lathe then 😂😂😂 what are you planning on producing with this beast?

[praendy2203]

Feb 4, 2022 15:41:49 GMT -5 slittlewing said:

Just a small lathe then 😂😂😂 what are you planning on producing with this beast?

Hi,

I dont know, something😉

There are smaller equipment available, but almost for the same price.

A smaller lathe has mostly a spindle bore from 20-28 mm, depends on the type.

The HPST shaft is ~31 mm, therefore I bought a slightly bigger one.
Also I think a lathe made in 1966 knows where the rabbit has the ears😎

Andy

[praendy2203]

That could be a big engine😁
Its a fan case from the CFM 56-7 

Andy

[slittlewing]

I have to admit a big lathe is always so tempting even for hobby use. The power to do big cuts, along with accuracy from such build quality, and swing over bed will always be useful!

Enjoy the new toy 😁

Cheers
Scott

[enginewhisperer]

big lathes are great if you have the space. Often they're super cheap because hardly anyone has the space, electrical power, or transport options required.

I picked one up a few years ago with an ~80mm spindle bore, and it's been very handy having that capacity!
It's also nice not having to keep switching chuck jaws to fit large things in it

The lathe was $500, and the crane truck for a couple of hours needed to transport it was $600!