2 replies to this topic

[SJ Lambert]

Anyone got a favourite supplier of
a) made to order cam followers
b) a firm who's able to provide good quality DLC coating for use in conjunction with high lift steel cams?

Arrow Precision springs to mind in the UK, I don't know who's the go in the USA though?

[manolis]

Hello SJ Lambert

Quote from Engine Expo 2016:

New DLC Coatings Offer Up to 50 Times Reduction In Abrasive Wear

Ionbond will present Tribobond 48 ta-C, a newly developed DLC coating for engine and injection system components exposed to temperatures up to 400 °C.
Compared to conventional hydrogen-containing DLC (a-C:H) coatings that have been used for many years, the company says Tribobond 48 ta-C exhibits an increased hardness of HV 0.05 >5000 and a comparably low coefficient of friction of 0.2 (under dry conditions). The new coating is typically deposited with a thickness of less than 1.5µm.
Tribobond 48 ta-C is used in high load assemblies where service temperatures exceed 300 °C and / or where increased wettability with oils, gasoline and diesel fuels is required.
In combination with specifically formulated oils, the friction losses of two sliding surfaces can be further reduced by a factor of 2, compared with conventional DLC lubricated with standard oils. Ionbond have found that the abrasive wear resistance is up to fifty times higher when used at temperatures of 200 - 400 °C, compared to surfaces coated with hydrogenated DLC.
The new coating is available for high-volume production from the Ionbond automotive competence center in Venlo, NL.

Engine Expo 2016 stand number: 3318
http://www.ionbond.com

End of quote.


Provided things are as ionbond claims, the above DLC coating seems ideal for the PatRoVa rotary valve ( more at http://www.pattakon....akonPatRoVa.htm



Thanks
Manolis Pattakos

Edited by manolis, 16 April 2016 - 06:49.

[SJ Lambert]

Thanks Manolis, I've managed to obtain suitable ones from Arrow Precision.

Cheers

James