• The Biplane Forum is a large global active community of biplane builders, owners and pilots. From Pitts to Skybolts, to older barnstormers, all types are welcome. In addition to our active community, our content boasts exhaustive technical information which is often sought after for projects and maintenance. This information has accumulated over the 12+ years the forum has been in existence.

    The Biplane Forum is a private community. Subscriptions are only $29.95/year to gain access to this great community and unmatched source of information not found anywhere else on the web. We are also a great resource for non biplane users, since many GA aircraft are built the same way (fabric and tube construction).

  • If you have bought, sold or gained information from our Classifieds, please donate to Biplane Forum and give back.

    You can become a Supporting Member which comes with a decal or just click here to donate.

Pitts S1 Torque Tube Bearing Blocks.


Registered Users
Jun 9, 2013
Reaction score

I have a set of these CNC machined torque tube bearing blocks for a Pitts S1. I had these precision machined last year when I upgraded my S1-S from the old "sloppy metal on metal" style bearing to one with a KP-6 in the end. Built to the specs highlighted in the plans dated 3-16-72, DWG No:1-510. I had to order 5 sets to have the machine shop make them, and this is the last set remaining. These are very high quality made from 6061-T6.

Price is US$110 including shipping.



Registered Users
Lifetime Supporter
Aug 22, 2012
Reaction score
I will take it.

Latest posts