Engine mounts 120 Jota

84 X 6 is 504, roughly $1000aud. That's a lot of beer! I like free holes. Problem with the shore hardness thing , that reading was done by Mackay "a couple of years ago", when they had already turned to wood. I wonder what the shore hardness is of a lump of radiata pine?
 
Dont know if you read that Rubber Tech bit I found Marty but Shore Hardness is 1 of 2 measures required to spec Rubber components. The relevant bit is at the end of the article and is used to spec Rubbers elastic property, that's more important to reduce vibration transmission from what I can see. This specs Rubber and Ploy as well.
Both IRHD and shore scales give measurements of hardness on a scale of 0 - 100 degrees. The difference between these two methods comes from the fact that the Shore Scales are linear, based on the deflection of the rubber, whereas IRHD is a non-linear scale related to the elastic modulus of the material. For highly elastic rubbers, Shore A and IRHD give comparable values. A comparison of hardness values for IRHD and Shore A Hardness is shown in the table bel
 
martymoose said:
84 X 6 is 504, roughly $1000aud. That's a lot of beer! I like free holes. Problem with the shore hardness thing , that reading was done by Mackay "a couple of years ago", when they had already turned to wood. I wonder what the shore hardness is of a lump of radiata pine?
Click to expand...
Ouch, wasn't aware the Pacific Peso had depreciated so much... :rolleyes:

Once the weather warms up a bit I'll have a go at re-pouring some with PU, I'll let you know how it goes Marty. I think I went for Shore 40 for a start.

piet
 
martymoose said:
84 X 6 is 504, roughly $1000aud. That's a lot of beer! I like free holes. Problem with the shore hardness thing , that reading was done by Mackay "a couple of years ago", when they had already turned to wood. I wonder what the shore hardness is of a lump of radiata pine?
Click to expand...

it is a high price, I agree. However, they are produced in very small batches, the material costs a bit, he has to pre-finance everything including the research etc. etc., not talking about paying tax from it...

years ago I had contact with the original manufacturerer of the neutral switch. Seeing that I had at least to buy 3.000 to make it somewhat cost effective, I ended up sourcing the 2 or 3 I needed at that time in UK for around 30€ each... sure that was way beyond the production cost, but considering how many you sell, you need to cover the cost of all 3.000 with the maybe 100 - 200 you sell in 5 years... These things are almost one-offs made in Europe, not mass products produced somewhere cheap in China as we all for sure know...
 
Might be worth checking out?

From: Jon Copping <jon.copping@metroseal.co.uk>
Subject: FTAO PARTS

Good Afternoon

I hope you are well

I am the Business Development Manager at Metroseal we have branches in Essex and Cambridge and manufacture the following that might be of interest to yourselves:

RUBBER MOULDINGS – LOW-COST TOOLING/LOW MIN QUANTITIES
SELF GRIP PROFILES
GASKETS – VARIOUS MATERIALS RUBBER/CORK/CNAF
RUBBER SHEETING
MOULDED HOSES
RUBBER BUSHES

WE CAN MAKE PARTS FOR ALL MAKES/MODELS FROM A SAMPLE OR DRAWING

If you would like a quotation on any of the above products or any further information please do not hesitate to contact me.

I look forward to your reply

Kind Regards
Jon Copping​
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28 ‑ 30 Purdeys Way, Purdeys Way Ind Est, Rochford, Essex, SS4 1ND​
Tel: 0044 (0)1702 548800​
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Fax: 0044 (0)1702 549966​
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hooksey said:
Rattle ya dentures free that stuff!
Natural rubber for me……..are they still growing it commercially?
Click to expand...

Had a Ford car, not very old with irs. There was a loud clunk every time I took off from standstill

Took it to a suspension place who told me the diff centre mounts were toast…. but not covered by Fords warranty

So, they made their own polyurethane mounts and fitted them

Picked up the car and no more clunk … happy happy

But at and over 80klm
 
hooksey said:
Rattle ya dentures free that stuff!
Natural rubber for me……..are they still growing it commercially?
Click to expand...

Had a Ford car, not very old with irs. There was a loud clunk every time I took off from standstill

Took it to a suspension place who told me the diff centre mounts were toast…. but not covered by Fords warranty

So, they made their own polyurethane mounts and fitted them

Picked up the car and no more clunk … happy happy

But at and over 80klm the fucken vibrations were unbearable….. seems the had to make another mould with Swiss Cheese holes in it. That fixed it, but they confirmed that mine were the first they’d done for that car. Used me as a crash test dummy 🙄
 
When I modified the frame for my race bike where I put a 120 deg SFC engine in a early triple frame I made the engine mounts by myself using the bushes of Koni/ Icon dampers.
Andre
 
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