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Topic: Beaulieu 708EL New Spool Spindles
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Andrew Woodcock
Film God
Posts: 7477
From: Manchester Uk
Registered: Aug 2012
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posted May 30, 2017 08:56 AM
It's polished solid brass Maurice. They can be easily removed at any given point in time to give them a buff with Autosol or the likes.
Just one M3 grub screw to release the locking tab away from the hub.
Brass was the only suitable material I had to hand at this point in time and something I used to use extensively to make heater straps for anti condensation heaters in large a.c. induction motors years ago.
Having stripped these down after 10-15 years in service, going from over 100 degrees centigrade down to freezing at times, I never noticed any great degree of tarnishing using this material.
If you want them chrome plated, electroplating or lacquered etc, no problem,..
But that's even more expense on top and for my own personal requirements, I consider it unnecessary to be honest.
Even the photos of the originals above, show some examples of discoloration to some of the original Beaulieu hubs.
This hopefully won't be the case in this instance given that these are made from Stainless Steel.
I can make tabs from this if anyone prefers?
http://www.screwfix.com/p/alfer-chrome-effect-anodised-aluminium-flat-bar-20-x-2-x-1000mm/6501p
[ May 30, 2017, 10:14 AM: Message edited by: Andrew Woodcock ]
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"C'mon Baggy..Get with the beat"
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Andrew Woodcock
Film God
Posts: 7477
From: Manchester Uk
Registered: Aug 2012
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posted June 02, 2017 05:19 AM
I have just been speaking with the manufacturer regarding this work and all dimensions so far have worked out fine he was telling me.
A slight change of plan may prove necessary for the finished width of the chrome finished locking tab.
This may well turn out to require a finished width of 9mm instead of the previously planned 8mm width based entirely only on guess work unfortunately, at the time of submitting the drawings and all other photographs and data.
He assures me the first completed upgraded hub will be ready on Monday of next week and I should then have a pair ready for around Friday next week, ready to report back here upon, once fitted and working as a pair.
Future products may entirely be manufactured from aluminium to further aid fast production of these and also hopefully, slightly reduce the overall cost for other potential customers.
The Stainless Steel hubs will be fantastic but the material is of course extremely hard to drill, tap and mill, especially for such small machining profiles as is required for these.
He assures me he can get the appropriate sized round aluminium bar in cost effective small quantities in the future, which of course, is further great news for all Beaulieu users for the future. ![[Wink]](wink.gif)
The guy is also investing in some gear cutting used equipment for his small industrial workshop very soon.
That means there is a very good chance these could be made to identical replica standards without the need to have the original nylon ones modified in the future.
This would then improve this design above and beyond even the original Beaulieu HTI and later Studio reel holders once they can be made entirely from one solid Aluminium round bar! ![[Smile]](smile.gif)
[ June 02, 2017, 08:10 AM: Message edited by: Andrew Woodcock ]
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"C'mon Baggy..Get with the beat"
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Andrew Woodcock
Film God
Posts: 7477
From: Manchester Uk
Registered: Aug 2012
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posted June 02, 2017 02:52 PM
Thanks Phil.
Yes my friend, i am acutely aware that you use a lathe to turn stainless steel but it is a harder material than most to do so with.
As such, tool tips, taps, dies and drills dont tend to weather as well over time and the material of choice for in the future will definitely be Aluminium.
Even Aluminium has its drawbacks so far as machining is concerned in that it tends to clog up in and around the tool tip when cutting it.
This however is something that is easier to live with than say snapping a semi blunt 2mm straight shank drill 10mm into a stainless steel component!😆😆
As for the gear wheel, i am happy to replicate the same method as Beaulieu themselves did by using the original nylon component amalgamated with the improved front spindle hub, but if someone without the later improved dual ball bearing nylon assembly wanted a set of these incorperating the ball bearings, it is nice to feel we have alternative plans to make this happen.☺☺
The manner in which these run over and beyond the original sleeve bearings is as different as chalk and cheese and both of my machines will have ball bearings fitted to their spindle hubs now very very soon.
The sleeve bearings really do hamper large rewinding tasks on these even with decent torque settings on the clutches
Try an experiment by simply swapping one over and youll instantly see what i mean!
[ June 03, 2017, 02:10 AM: Message edited by: Andrew Woodcock ]
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"C'mon Baggy..Get with the beat"
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Andrew Woodcock
Film God
Posts: 7477
From: Manchester Uk
Registered: Aug 2012
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posted June 02, 2017 05:44 PM
I don't believe there will be MK1, MK2 and MK3 versions of these as they are already matching a proven successful and popular design.
If money was no object, then further improvements would see a 3 pin location peg system and ball latching mechanisms to do away with the need for a locking tab to facilitate quick release.
The thing is though, when pricing this little project up in the first instance, i was surprised by just how difficult it now is to get anyone interested in small batch orders of this kind, let alone making the project the mechanical equivelent of a cryptic crossword.
It was for these reasons why it was jointly decided to stick in the end with an existing and proven design so as to avoid pitfalls of prototyping and to ensure each time a component was manufactured at a cost, it wasnt just wasted expenditure on a trial test piece.
I think the only way my own hubs will differ in any way from most others made by him, is mine will be stainless and subsequent ones will be Aluminium.
If you have the original dual bearing type already on your machine Steven, modifying them into the HTI / Studio kind, should be very quick and simple after these have been made for me.☺
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"C'mon Baggy..Get with the beat"
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Andrew Woodcock
Film God
Posts: 7477
From: Manchester Uk
Registered: Aug 2012
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posted June 03, 2017 01:32 AM
ok Phil, thanks for that.
fitting two of these tiny bearings is in itself a complete mystery to me.
If you look to reputable bearing suppliers like SKF, FAG etc, 3mm thickness on this size is actually quite difficult to find, even for miniature bearing standards.
They can be found, identifiable as a 685 code, but not easily at this width.
https://www.lily-bearing.com/ball-bearings/miniature-bearing/miniature-metr ic-bearings/685-bearing/
If they had fitted one bearing at one of the standard sizes of say 5mm thickness, one would have been more than sufficient given the load these experience and they then would have come as standard, shielded in either the 2Rs rubber shielded variant or ZZ, metal shielded.
This would have enabled them to be "sealed for life" type bearings requiring no further lubrication in their expected lifespan. Far better than none shielded "open" bearings for this application.
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"C'mon Baggy..Get with the beat"
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