Compression Hub Adapter has Arrived ! !

 

 

                 Great news !  No, astounding news ! The new compression hub adapter design has   arrived and it is really sweet.  It is designed to clamp around the entire shaft in a more or less uniform fashion, and we anticipate that it will not demonstrate the same lateral movement that one might expect with a key way adapter that is secured on only one side with set screws.

 

The pictures below show the overall design, and the stepwise assembly of the adapter parts, on a precision shaft that was mounted in a lathe.  The assembly was then measured for facial and radial travel when slowly rotated.  Our machinist is making a total of four of these units for our first production run, and we hope to be able to offer some of these adapters either thru this blog or on EBay. 

 

 

 

                                                                  Picture DSCN0814

The picture above shows the flywheel side of the adapter.  There are 8 outer perimeter holes for the bolts that will attach the flywheel.  The smaller (and inner) holes allow for the insertion of a hex key to tighten the compression sleeve clamp to the shaft after it is inserted on the opposite (motor face) side.

                      
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Picture now showing the flywheel face of the adapter after the ball bearing has been pressed in.  The center of the ball bearing will function as the pilot sleeve for the tip of the transmission shaft.  

Edited 12/23/2021

The center lubricated Ball Bearing, Sealed, Trade No. 6002-2RS, for 15 mm Shaft Diameter is McMaster Carr part # 5972K83 at $9.17.  The bearing has a 32 mm OD and it is 9 mm wide.  Maximum speed is 13,300rpm.   

Edited 5/12/2023

The original hub was manufactured using 1144 free machining steel and for this project a piece of rod stock was chosen that after machining, resulted in an adapter with 3.744" diameter and 2.473" height.

A good survey of types of readily available steels can be found online in the McMaster-Carr catalog.  Type into the McMaster search engine,  "types of steel", then at the top of the page, click on "About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron,   more", and a table of choices is presented.

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Picture showing the test insertion of the bolts that will secure the flywheel to the adapter face. 
        
                                        

 Picture DSC00877 showing a sheared M6-1.0 x 30 bolt at 6:00.  This will be center drilled and extracted.er

updated 12/14/20


                            

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                       Motor face side of the hub adapter prior to installation of the clamp adapter (B-Loc).

edited 5/16/2023
DSC01723 showing both sides of the Fenner Drivers B-LOC keyless bushing, 1.125", part # T122102.  ($100.84 each from BDI , 630-595-9034).

edited 5/16/2023

DSC01784 showing the taper of the insert on the right side and the internal aspect of the B-LOC. 

edited 5/16/2023

DSC01786 of Instructions included with B-LOC.

 

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edited 5/16/2023

                 Motor face side of the hub adapter after insertion of the B-Loc keyless bushing.  When tightened on the motor shaft to 12 ft-lbs torque with hex keys from the other side, the vertical space at 12:00 nearly disappears.  

Edited 12/23/2021

The internal coupling was sourced from Fenner Drives here :  https://www.fennerdrives.com/b-loc/_/B-LOC-B112-1-1/8/?=

It is a B-LOC and as of this edit they are priced at $113.74 under part number B-Loc-B112-1-1/8".

Here is a 360' view animation:

 https://www.fennerdrives.com/_resources/_global/media/360/B112/fvx.B122100/fvx.B122100.html  

 

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After insertion of the clamp adapter, the adapter was slid onto the precision simulated motor shaft that was mounted in a lathe.  The cap head bolts were then tightened thru the smaller holes on the face of the adapter and the run out of the face of the adapter was measured to confirm that the adapter face was perpendicular to the shaft.

  

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After attaching the hub adapter to the shaft that was secured and precisely centered in the lathe, the Aluminum racing flywheel was then bolted together and the axial and facial run out was measured.



We will next mount this new adapter and flywheel on the Warp 11 motor to test for vibration under power.  The three castings described in the August posting are at the machinist and we are told they will be ready next week.

The original key way hub adapter and motor/transmission adapter plates which were received and then described on this blog on July 28, 2012, are being refined at the machinist.  We anticipate that they will also be delivered to us next week.

After both designs are on site, then we will compare the designs to learn if there are measurable differences in the performance of each.

Stay tuned.