Member postings for Stephen Meredith

Hello, sorry yes the bevel gears. The 46 Teeth ones.

Thankyou all for the replies and great photo's.

Can I ask, do you know what cutter should be used for the large diff main gear Pinion's? I have the book and will do the maths, but so I can check I'm on the right lines with the workings out, before I commit to buying another cutter in error.

Thanks in advance.

(I've got the full set of 10DF cutters now lol - nice to have, and hardly used sharp ones).

Stephen.

Hello, hope you are well, can I ask the differential pinion gears, are these cast gears or have they been machined? I'm interested if they are also 10DP like the other gears as the drawings are not clear in the explanation. And also the 2 larger side gears bossed one and the no boss gear.

Hello, just a final question in the gears with Keyways. Final pinion, slow gear etc.

What size would you use have you gone with the drawing say 3/16" x 5/32" but this doesn't sound like a square key?

Did you stick with imperial or swap to a metric size, and possibly square key cutting to half the key depth?

Any help I'm confused.. Stephen

Hello again is there a reason the 2nd motion shaft fast gear has such a large boss. The drawing says 1-1/4" was wondering up the key caused problems and its been sized up from when my drawings were produced.

Any help greatly appreciated

A question about your gears, did you use the cast blanks produced by Bridport for your 2nd motion gears?

Initially had trouble with the photo, finally found a way to post it the dimension I'm struggling with is the one marked in red, is this meant to be 1 - 7/8" not just 7/8" I know the drawing is to scale and it certainly bigger than 7/8" .

Hello all.

Another small question on my 3" drawings the hole on top of the smokebox tube says 7/8 but the chimney base castings bore says 1"-7/8 is the hole on the smokebox wrong. Attached photo of the drawing if i can manage to do it. Should they both be 1 -7/8"

Thank you both for the replies.

Looks like college supplies at a show, and get a good bit, and at least see it before buying.

Hopefully, some new old stock that's straight.

I think this engine's a big step up from my previous model this may not be my last question.

Jason can probably vouch for that as you have helped me a lot in the past building the Minnie,

I owe you many pints.

steve.

One final question martin.

What did you use for the rear axle,

Is obtaining the required length in silver steel the way

Or is a simple MS bar polished up enough to run smooth

In the bearings. I can imagine a ground bar being pricey especially as its longer than 13" the standard for silver steel.

Any help appreciated from anyone.

Cutters Obtained!

Just an update I ended up going to the Midlands model engineering show and dropped lucky with the same Steve Holder. (Home and workshop)

I bought 3 of the cutters needed to start cutting gears for the engine at a reasonable price and all-important 20deg cutters. Actually started machining the smokebox tube and a few castings purchased my other finished engine can be seen to the right hiding 1" Minnie. The new smokebox being 3 times larger.

Edited By Stephen Meredith on 01/11/2019 15:57:17

Fantastic looking job Martin, I feel reading the entire thread you did the right thing, I will try to follow the same.

Keep up the good work, and keep posting I'm sure it helps lots of people, not just me.

Just ordered the first few bits from Bridport so now in committed.

Regards Stephen.

Hi Martin, just quick question did you go with the

14.5 deg PA ? im in the same boat thinking of building

the same model and cost of the cutters.

RDG seem a cost effective solution but only if the 14.5

worked out.

Stephen.