Defective Acculign Lever Pegs?

all favoritism aside, look at the first pics and tell me how billet aluminum can break like that?

i will be eagerly awaiting Mark's response but that first pic looked rather scary
 
Hmm, that is really really interesting. Keep us all posted on the outcome of this. If it was bonded, then they really covered it up well. If it is indeed a fracture, that is one for the Ye Ol' Book of Curiosities.....
 
l'm very interested in how this all turns out as l'm about a month away from purchasing these rearsets, although l have heard nothing but good things about Acculign, l think l will be waiting now for the outcome.
 
Easily, if there is a stress riser or a defect in manufacturing. Whether that error was in the bar stock for machining, or in the production process. I do not think this is a bonded component. Looking at my set very closely I see no signs that it is, and frankly after 10 years in being a prototype tester for several high performance VW/MINI tuners, it just doesn't fit. The easiest and cheapest way to make that part is billet, machined. I agree the peg itself is probably bonded in, but that arm itself is a one piece unit. If it isn't I have the crow on a slow simmer right and for me too eat.

Aluminium fails in strange ways. I have seen bicycle parts/prototypes made out of solid billet have completely straight fractures like this in areas less prone to stress than this...

I am not trying to be overly "pro" Acculign, but Mark is highly motivated to provide the best stuff for high performance cycles, and I just don't see bonding as the way to do this part. I sent off an email and let's see if he is willing to post in thread to answer this question and also see what his final thoughts are.

I would also be interested in a FEM was done on the prototypes.... prior to production.

Cheers,
Joel
 
Hello,

ptrein bought a silver rearset and levers for a 1098/848. Immediately upon hearing from him, we shipped him at no cost another toe peg. I immediately contacted Acculign and they will be calling ptrein. According to Acculign they did have a couple of these fractures with silver pegs a year ago. They thought they filtered the inventory but I guess one got through. They use solid aluminum stock to mill these pegs and there is no gluing or bonding. Apparently there were some imperfections in the raw stock that after machining gave way when pressure was applied. Those pegs were anoldized clear (silver) so they believe any issues will be with those.

They commented that of the couple they had, they always broke immediately on first use. They expect that the stock when made had an area of metallergic weakness (like brittleness).

They are confident that they have filtered these out. But if one slips through, as a rearset may have been in inventory somewhere already, then call Acculign on any indications of failure. The first time you use it, you will know if it is an issue. Otherwise, if there is nothing on first use, you are good to go.

We have sold many Acculign rearsets over the past year and half, black and silver. This is the first warranty issue we have had. I was surprised by it, but know when you are manufacturing (Acculign) from raw materials made by someone else, there is always a chance you got something they made wrong.

Acculign is great at customer service. If you have any concerns contact them directly.
www.acculign.com

As we all know sometimes %^#! happens. This was one of those occasions. I was also speaking with a customer last night who machines speciality parts for $100K Krieghoff custom shotguns. He described Acculigns as one of the finest works of machining he has seen in motorsport products.

I hope I have answered everyone's concerns, but remain available to try to answer anything else.

Scott
 
Back
Top