A A A
Avatar

Please consider registering
Guest

Search

— Forum Scope —






— Match —





— Forum Options —





Minimum search word length is 3 characters - maximum search word length is 84 characters

Register Lost password?
sp_Feed sp_PrintTopic sp_TopicIcon
Anyone with a lathe?
Avatar
Stoo63
GLASGOW
Area Rep
Forum Posts: 850
Member Since:
April 19, 2018
sp_UserOnlineSmall Online
1
May 15, 2020 - 3:52 pm
sp_Permalink sp_Print

Hi All, hope everyone's bearing up under the circumstances. Like so many of you, I'm unearthing old bits and bobs to rebuild but have come across a problem part and am wondering if anybody with a lathe would be able to knock off a few of the crankshaft spacer below. I'm a lathework virgin, so really have no idea as to the complexity of the task but, to my untrained eye, it doesn't seem to troublesome. The dimensions are included in the linked post(s). Obviously I'd be more than happy to weigh you in for your efforts, materials etc. Maybe some others would require the same part and make it a larger "order" Let me know, either on here or by PM. 

All the very best

Stewart

Distance-collar-resize-2_edited.jpg 

 

See more ** Please log in to view **

'52 D1 direct lighting plunger; '58 Square Four (project); '55 D3 Battery; '59 D1 direct lighting plunger;  '59 Tiger Cub; '60 5TA;  '76 FS1-E '97 Honda Sky SGX50.

Avatar
GlenAnderson
Dover
Top Gear User
Club Member
Forum Posts: 161
Member Since:
August 27, 2013
sp_UserOfflineSmall Offline
2
May 16, 2020 - 8:36 am
sp_Permalink sp_Print

To make that properly, and guarantee it will fit, you need tolerances as well as basic measured dimensions. And material specifications. 

There’s probably the best part of an hour’s work there, by the time you’ve set up, and cleaned up afterwards. 

Avatar
GlenAnderson
Dover
Top Gear User
Club Member
Forum Posts: 161
Member Since:
August 27, 2013
sp_UserOfflineSmall Offline
3
May 16, 2020 - 8:39 am
sp_Permalink sp_Print

A quick google throws up this. 

** Please log in to view **

Which is cheap compared to the time it would take to make one. 

Avatar
Stoo63
GLASGOW
Area Rep
Forum Posts: 850
Member Since:
April 19, 2018
sp_UserOnlineSmall Online
4
May 16, 2020 - 9:22 am
sp_Permalink sp_Print

Thanks Glen, I got my last ones from Mike in Oz. Just goes to show how rare they are round these parts. Probably have to send off to him again then. As I said, lathe's not my area of expertise so just enquiring generally.

All the best

Stewart

'52 D1 direct lighting plunger; '58 Square Four (project); '55 D3 Battery; '59 D1 direct lighting plunger;  '59 Tiger Cub; '60 5TA;  '76 FS1-E '97 Honda Sky SGX50.

Avatar
mikef
Chatham Kent
Club Technical Advisor
Committee
Forum Posts: 977
Member Since:
September 30, 2011
sp_UserOfflineSmall Offline
5
May 18, 2020 - 12:01 pm
sp_Permalink sp_Print

Hi Stewart.
        If you think that there is a need for these, I would have a go at making some.
I have some questions though.
Are they a sliding or interference fit on the shaft?
What are they made from? Someone said, alloy.
I would guess 6mm thick is critical but any idea of tolerances on the other dimensions.
Mike.

Avatar
cocorico
Central France
Top Gear User
Site Member
Forum Posts: 3593
Member Since:
June 23, 2013
sp_UserOfflineSmall Offline
6
May 18, 2020 - 12:09 pm
sp_Permalink sp_Print

Hi Mike, having recently rebuilt a D1 I can tell you that they appear to be cast aluminium, are a (loose) sliding fit on the shaft and as long as they are not too thick, will only need an extra shim or two to correct the end float. One side has a smaller diameter which just fits over the inner race of the bearing (to allow passage of petroil), the rest just fits inside the bearing recess. I think they could be easily turned up from some aluminium bar. If I can find any dimensions I'll post them.

1956 D3 running, lights to sort. 7 other bikes in the Barn. 1950 D1 engine now running.

Avatar
mikef
Chatham Kent
Club Technical Advisor
Committee
Forum Posts: 977
Member Since:
September 30, 2011
sp_UserOfflineSmall Offline
7
May 18, 2020 - 12:35 pm
sp_Permalink sp_Print

OK thanks. If they are wanted, just let me know as I have to order the bar to make them from. I think that I could have them done within a week.
Normally an order for metal is delivered in a few days. I can't guarantee that of course as deliveries can be slow at the moment.
Mike.

Avatar
Blue Heeler
Top Gear User
Site Member
Forum Posts: 2703
Member Since:
November 16, 2011
sp_UserOfflineSmall Offline
8
May 18, 2020 - 12:37 pm
sp_Permalink sp_Print

Stoo, all you need is some alloy plate the correct thickness and one of these... ** Please log in to view **

Ideally use a pillar drill, but it can be done on a bench with a clamp or in a vice, with a hand drill....if you drill a pilot guide hole and take it easy.

You could turn down the relief by using a very cheap mandrel, available online, fitting your newly made alloy disc onto it and in a drill in a vice and use a homemade cutting tool to relieve the section that requires it.

Blue

Avatar
Stoo63
GLASGOW
Area Rep
Forum Posts: 850
Member Since:
April 19, 2018
sp_UserOnlineSmall Online
9
May 18, 2020 - 1:10 pm
sp_Permalink sp_Print

Thanks, gents. Mike/ Bob, the dimensions etc should be in a link ** Please log in to view **

Blue, I'll see if someone has any joy with the big stuff first before letting my rudimentary skills loose on a lump of bar 🙂 Have you tried this method before?

'52 D1 direct lighting plunger; '58 Square Four (project); '55 D3 Battery; '59 D1 direct lighting plunger;  '59 Tiger Cub; '60 5TA;  '76 FS1-E '97 Honda Sky SGX50.

Avatar
cocorico
Central France
Top Gear User
Site Member
Forum Posts: 3593
Member Since:
June 23, 2013
sp_UserOfflineSmall Offline
10
May 18, 2020 - 1:58 pm
sp_Permalink sp_Print

A plain spacer with the addition of a washer against the generator side bearing inner race would be as effective, IMO. Even something like PTFE rod.

If you can find one - an oil flinger fills the same space.

1956 D3 running, lights to sort. 7 other bikes in the Barn. 1950 D1 engine now running.

Avatar
Stoo63
GLASGOW
Area Rep
Forum Posts: 850
Member Since:
April 19, 2018
sp_UserOnlineSmall Online
11
May 18, 2020 - 2:06 pm
sp_Permalink sp_Print

Quite possibly, Bob. It's a rudimentary part after all. Crikey, an oil flinger - they're even rarer methinks.... I'm really just thinking ahead as I'm not entirely sure which cases I'm going to rebuild next after I knock off this D3 I'm on at the moment 🙂

'52 D1 direct lighting plunger; '58 Square Four (project); '55 D3 Battery; '59 D1 direct lighting plunger;  '59 Tiger Cub; '60 5TA;  '76 FS1-E '97 Honda Sky SGX50.

Avatar
Blue Heeler
Top Gear User
Site Member
Forum Posts: 2703
Member Since:
November 16, 2011
sp_UserOfflineSmall Offline
12
May 18, 2020 - 2:14 pm
sp_Permalink sp_Print

Stoo63 said  Have you tried this method before?  

Yes many times in alloy, but generally not on such an easy job as a Bantam crank spacer, although one basic hole-saw job I did in 1976, was into a Laverda(or was it a Claas) Combine Harvester main tin cover panel, to access fuel tank sender unit and replace. Very, very noisy job...as was radiusing the four corners in top of a Rover SD1 roof to fit a sunroof(1986), along with using a jigsaw for the straight sections. Sooo noisy had to take one of my works portable generators up to the layby entrance to Rutland Railway Museum out in the sticks, so as not to annoy the neighbours. I still have some alloy spacers/packers/sheet from my mid-1980s civil engineering days, will jot down your measurements, measure up and let you know what I have.

Honestly, it easy 🙂 

..or a section of an alloy wheel spindle spacer. I have one off one of the totaled Guzzis I`ve rebuilt for folk.

...or I still have some teflon buttons out of my old proddy LeMans pistons, plus a larger dia long round bar of the same material a top engineer mate gifted me...I wont miss a slice off the end if it fits the bill. 

Be back when I`ve dug something out that`ll do the trick

Avatar
mikef
Chatham Kent
Club Technical Advisor
Committee
Forum Posts: 977
Member Since:
September 30, 2011
sp_UserOfflineSmall Offline
13
May 19, 2020 - 12:36 pm
sp_Permalink sp_Print

Hi.
   I've decided to make some of these spacers anyway, if there not needed it doesn't matter. Just a good exercise for me and will give me something to do.
I should have something to show in about a week.
Mike.

Avatar
Stoo63
GLASGOW
Area Rep
Forum Posts: 850
Member Since:
April 19, 2018
sp_UserOnlineSmall Online
14
May 19, 2020 - 12:50 pm
sp_Permalink sp_Print

Mike, you are an absolute gent! As you say, good practice and would be a handy wee part to have access to....

All the best,

Stewart

'52 D1 direct lighting plunger; '58 Square Four (project); '55 D3 Battery; '59 D1 direct lighting plunger;  '59 Tiger Cub; '60 5TA;  '76 FS1-E '97 Honda Sky SGX50.

Avatar
cocorico
Central France
Top Gear User
Site Member
Forum Posts: 3593
Member Since:
June 23, 2013
sp_UserOfflineSmall Offline
15
May 19, 2020 - 2:21 pm
sp_Permalink sp_Print

I'm sure you will be like a toothless parrot (ie suck seed). embarassed

The dimensions given don't call for the utmost precision as long as they are not oversized.

1956 D3 running, lights to sort. 7 other bikes in the Barn. 1950 D1 engine now running.

Avatar
mikef
Chatham Kent
Club Technical Advisor
Committee
Forum Posts: 977
Member Since:
September 30, 2011
sp_UserOfflineSmall Offline
16
May 19, 2020 - 2:52 pm
sp_Permalink sp_Print

Yes, I'll make the 6mm thickness 6mm -05/+0mm.
Whilst on the subject of making parts. I know the Rex Caunt  con rods need a bespoke small end bush made for the D1 D3.
I think that I could make these, the rod eye is 19mm and I have the internal diameter listed in the BSA manual.
The rod eye will need to be a 0.001" interference fit.
Ideally I would need the rod and gudgeon pin to do it properly.
I think that I could do it if need be. The problem that I have is the material. I have seen that SAE660 phosphor bronze is easy to obtain but would that be good enough for a small end bearing? I don't have the knowledge of metals. Any ideas?
Mike.

Avatar
SpacedMarine
Up north
Top Gear User
Club Member
Forum Posts: 729
Member Since:
July 1, 2018
sp_UserOfflineSmall Offline
17
May 19, 2020 - 3:10 pm
sp_Permalink sp_Print

I'd say phosphor bronze would be ok Mike (it's not cheap though) could make up gearbox bushes while your at it 👍🏼

What's 7/16 in mm again?

Avatar
garry
Second Gear User
Site Member
Forum Posts: 9
Member Since:
March 5, 2014
sp_UserOfflineSmall Offline
18
May 19, 2020 - 3:31 pm
sp_Permalink sp_Print

I have six of these I got them from an old boy some years ago  NOS I was told at the time . £20.00 each including delivery UK mainland only. This is a pic of one of them for referenceD5149763-B278-4BFE-9406-31BA20AB03AA.jpeg8F1D9667-24A6-4C85-9464-BB5541260D2D.jpeg77F03165-9970-4CBE-8D36-B3DA17D7446E.jpeg5E942194-9FD7-4659-965F-81E6FFABF21A.jpegB5D2ECCC-CABB-47C5-ACCC-C2D32C047339.jpeg03B309B3-BC9A-4410-82C2-FF9BD8563D90.jpeg

Avatar
Blue Heeler
Top Gear User
Site Member
Forum Posts: 2703
Member Since:
November 16, 2011
sp_UserOfflineSmall Offline
19
May 19, 2020 - 3:53 pm
sp_Permalink sp_Print

garry said
I have six of these I got them from an old boy some years ago  NOS I was told at the time . £20.00 each including delivery UK mainland only.   

Titanium?

Avatar
Stoo63
GLASGOW
Area Rep
Forum Posts: 850
Member Since:
April 19, 2018
sp_UserOnlineSmall Online
20
May 19, 2020 - 4:24 pm
sp_Permalink sp_Print

I'm having some shipped from Oz for less than 20quid  🙂

'52 D1 direct lighting plunger; '58 Square Four (project); '55 D3 Battery; '59 D1 direct lighting plunger;  '59 Tiger Cub; '60 5TA;  '76 FS1-E '97 Honda Sky SGX50.

Forum Timezone: Europe/London

Most Users Ever Online: 223

Currently Online: ZZ, Unitminor, Stoo63
11 Guest(s)

Currently Browsing this Page:
1 Guest(s)

Top Posters:

cocorico: 3593

Cornish Rooster: 3310

bart: 3125

Blue Heeler: 2703

Sprung Chicken: 2653

David Dale: 2484

Mags 1: 2335

Piquet: 2315

Munchkin: 2209

nickjaxe: 2091

Newest Members:

_2889

Forum Stats:

Groups: 9

Forums: 48

Topics: 12564

Posts: 108863

 

Member Stats:

Guest Posters: 1477

Members: 2057

Moderators: 0

Admins: 4

Administrators: Bantam-Super, JMD, Springs, Stoo63