All specs for front and rear drum brakes minimum machine thickness and mfr's drum thickness mfr's shoe thickness please?
The spec is on the drum
Testimonial: "thankyou for your input very helpful.i dont have a drum in question as this is an assessment course i doing and all i need are answers relating to the subject'"
Why are you concerned with the minimum thickness measurements?
If you do not have the knowledge to get the info I feel you should be passing this task to a qualified tech, who would likely have this info at their disposal and do the task correctly.
Brake work is not for the untrained. I know there is a culture of re-machining drums and discs but go to a parts house or ebay and fit new.
Then you know they will hold up when you most need them.
Most discs and drums have the min thickness figures cast in them. When pads and shoes are worn, they're worn. Pads about 1/8th even pad left, shoes 50% of original thickness unless mfr says otherwise.
This advice is based on you knowing your capabilities.
Testimonial: "i am a student doing a course for panelbeating and thi s is a question on one of my assessment sheets AND YES i do know how to dismantle and repair thankyou i am not naive i do know what im doing!"
The general rule of thumb for pads and brake shoes is that when they are worn to 70% of original thickness you should plan for new brakes within no more than 1000 miles or sooner if you are hard on brakes or live in a hilly area or commute in stop and go.
I also agree about new verses machined. Brake rotors are much more prone to warping if they are cut down in the machining process and the whole job will need to done again. There is a parts supplier on line that sell high quailty parts for way below local prices, the web address is www.rockauto.com
I wasn't infering you were not capable but you were asking for wear limits on a '94 vehicle which gave the impression you had concerns about wear limits. If you had made your question a little clearer I could have answered in one line like Dennis did. Regards.
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