Vented Disks vrs Solid disks
Moderator: RichardW
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Re: Vented Disks vrs Solid disks
Good luck with your metallurical analysis, then. I hope you are also equipped to be a competent 'expert witness', if it ever came to that.
Chris
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Re: Vented Disks vrs Solid disks
Well I do work with Cast Iron and steels every day....
I do have original (old) Citroen C5 disks in a corner to compare to...
I do have confidence in my long history working with metals from my time with Stratec/Straumann (Swiss Metallurgical/Medical specialists) and over 15 years recently working with Cast Iron of various qualities from various sources.
The are many basic identifiers of quality/material if you know what you are looking at.
All in all, I do not think you will need a black tie or visiting form from the local prison....if they are s**t they do not go on, simple as that.
I do have original (old) Citroen C5 disks in a corner to compare to...
I do have confidence in my long history working with metals from my time with Stratec/Straumann (Swiss Metallurgical/Medical specialists) and over 15 years recently working with Cast Iron of various qualities from various sources.
The are many basic identifiers of quality/material if you know what you are looking at.
All in all, I do not think you will need a black tie or visiting form from the local prison....if they are s**t they do not go on, simple as that.
Alasdair
Activa, the Moose Rider
3x C5x7 Steering racks and counting
Activa, the Moose Rider
3x C5x7 Steering racks and counting
Re: Vented Disks vrs Solid disks
I'd be confident enough to check a pair and assess the quality, I'm sure sticky can do it. A couple of gauges and a bit of know-how go a long way.
- Stickyfinger
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Re: Vented Disks vrs Solid disks
The "quality" of the casting can be assessed from the visual elements that have not been machined.
Colour of the machined surfaces
Structure of the "raw" parts.
Flash on the raw parts.
Evenness off the internal fins and their thickness/uniformity
The mould quality/material can also be assessed as well , its material imprint is replicated as is the method.
Temperature of the casting
Investment material/quality
Sound/tone
etc etc.
Cast items are easier than machined billet goods as they tell a story
Colour of the machined surfaces
Structure of the "raw" parts.
Flash on the raw parts.
Evenness off the internal fins and their thickness/uniformity
The mould quality/material can also be assessed as well , its material imprint is replicated as is the method.
Temperature of the casting
Investment material/quality
Sound/tone
etc etc.
Cast items are easier than machined billet goods as they tell a story
Alasdair
Activa, the Moose Rider
3x C5x7 Steering racks and counting
Activa, the Moose Rider
3x C5x7 Steering racks and counting
- white exec
- Moderating Team
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1992 BX19D Millesime hatch LHD
previously 1989 BX19RD, 1998 ZX 1.9D auto, 2001 Xantia 1.8i auto
and lots of Rovers before that: 1935 Ten, 1947 Sixteen, 1960 P5 3-litre, 1966 P6 2000, 1972 P6 2000TC, and 1975 P6B 3500S - x 1752
Re: Vented Disks vrs Solid disks
OK. That's all more than I could and would ever tackle to evaluate low-price brake disks. There is so much fake stuff on ebay (including packaging, branding, documentation and engineered marks) it's a risk I am not equipped to take, especially with such a safety-critical part.
Very much a personal choice, of course.
Very much a personal choice, of course.
Chris
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Re: Vented Disks vrs Solid disks
You cannot make a casting lie, it has by its very nature got its whole story "imprinted" into it. As said, a fully machined part is a different matter as that has had its "story"machined away.
I will await the parts before I commit to their quality however
I will await the parts before I commit to their quality however
Last edited by Stickyfinger on 18 Jun 2016, 22:01, edited 1 time in total.
Alasdair
Activa, the Moose Rider
3x C5x7 Steering racks and counting
Activa, the Moose Rider
3x C5x7 Steering racks and counting
Re: Vented Disks vrs Solid disks
Depends on your skills and experience though. I think I can tell too but I have the backup of several skilled engineers when I get puzzled.