What, no pentalobe?
List of screw drives
31–40 of 263 posts
Re: List of screw drives
#32In Canada there is a saying: Anyone who doesn't use a Robertson head is just being an asshole.
Unfortunately Robertson bits are rare south of the Canadian border. I have lots of "universal" bit sets, and only one came with a set of Robertsons. (Most did come with square bits, but these are apparently not the same as Robertson, either in dimension or shape.)
Re: List of screw drives
#33Do you find yourself stripping Phillips head acres frequently? That is because you are confusing Phillips and Pozidriv heads. They look similar but have a different head and different amount of engagement. I just bought myself some Wiha drivers after years of using shitty tools. I am so much happier now.
Protip: All Ikea furniture with screws use Pozidriv heads. (Everything with bolts using Allen heads, of course.)
It's unfortunate that Ikea doesn't seem to publicize this or provide drive heads with their furniture (AFAIR). I was glad I picked some up before I did a kitchen with Ikea cabinets. It saved me a lot of grief.
Re: List of screw drives
#34Earlier quoted context omitted.
I’ve mainly had the problem when getting them out. Especially when the application requires thread locking compound and has been out in the field for a few months or years - even when they had been properly torqued with a torque wrench. We abandoned Phillips and Pozidriv completely and went to Torx for the screws (we were already using hex for bolts). Haven’t really had any issues stripping out screws since.
Phillips is incompatible with thread lock assuming you want to take them out. If threadlock is not used the removal torque is actually less than the insertion and it shouldn't be a problem in this case.
I wish auto manufacturers knew this.
Re: List of screw drives
#35Earlier quoted context omitted.
I work for a company that makes scientific equipment. We apply a few basic criteria, which narrow things down a lot. First, a lot of those fasteners are either really specialized or just rare or obsolete. So they can be ruled out. We look for something that will be easy for our assemblers, and for our field service technicians. They have given us feedback on what they like and dislike, including what kinds of tools a…
> We even have mixtures of US and metric in some products! In North America, tire sizes are given in millimeter width, but imperial mounting diameter. E.g. 175-65R14: 175mm width, 65% aspect ratio (sidewall height to width or something like that), for a 14" wheel.
I noticed that the other day too! Dumb question but what does the rest of the world do? Do they convert inches to mm or is the inches diameter just an approximation of the more exact metric diameters?
Re: List of screw drives
#36Earlier quoted context omitted.
I work for a company that makes scientific equipment. We apply a few basic criteria, which narrow things down a lot. First, a lot of those fasteners are either really specialized or just rare or obsolete. So they can be ruled out. We look for something that will be easy for our assemblers, and for our field service technicians. They have given us feedback on what they like and dislike, including what kinds of tools a…
> We even have mixtures of US and metric in some products! In North America, tire sizes are given in millimeter width, but imperial mounting diameter. E.g. 175-65R14: 175mm width, 65% aspect ratio (sidewall height to width or something like that), for a 14" wheel.
I just learned about Nominal Pipe Size, in which the number that precedes the word "inches" does not refer to any actual measurement on the pipe. The specific characteristic of the gas grill pipe hookup on the back of my house that makes it a "half inch pipe" is that it has a .84 inch outer diameter; there is literally nothing about it, including the inner diameter, that could be described by the words "half inch".
Re: List of screw drives
#37What, no pentalobe? https://en.wikipedia.org/wiki/Pentalobe_security_screw
Re: List of screw drives
#38It's remarkable that pretty much every feasible design has some traction. You might expect it to be winner-take-all.
We're probably at 80% Phillips, 15% flat head, 5% everything else, though.
Re: List of screw drives
#39Earlier quoted context omitted.
I’ve mainly had the problem when getting them out. Especially when the application requires thread locking compound and has been out in the field for a few months or years - even when they had been properly torqued with a torque wrench. We abandoned Phillips and Pozidriv completely and went to Torx for the screws (we were already using hex for bolts). Haven’t really had any issues stripping out screws since.
Even without thread locking compound, if the thing they're stuck in has corroded the screw/bolt or expanded. Phillips shouldn't strip going in, but it sure as hell strips coming out.
Yeah, this is compounded by the fact that our products go into marine environments - all our fasteners are 316 stainless but there are still sometimes galvanic issues.
Re: List of screw drives
#40Earlier quoted context omitted.
> We even have mixtures of US and metric in some products! In North America, tire sizes are given in millimeter width, but imperial mounting diameter. E.g. 175-65R14: 175mm width, 65% aspect ratio (sidewall height to width or something like that), for a 14" wheel.
I noticed that the other day too! Dumb question but what does the rest of the world do? Do they convert inches to mm or is the inches diameter just an approximation of the more exact metric diameters?
I can't speak for cars, but there's a similar situation with bicycle wheels and tires. There are all sorts of historical measures, such as "26 inch" and "700c," but at the same time most rims and tires are marked with ISO dimensions that are in mm and quite well defined.
So for instance my "27 x 1-1/8" tires are also ISO 28-630, where 28 is the approximate inflated width, and 630 is a particular dimension of the rim. When I buy a new tire, I look at the ISO number to make sure I got the right size.
I recently restored an old Schwinn with its own oddball tire diameter, but ISO numbers published by modern tire makers got me up and running with new tires.
I think that in a lot of cases, English vs metric is a moot point because a tool is so specialized (spark plug wrench) or because production tools are computerized and switch unit systems as needed. On a milling machine, all dimensions boil down to the number of stripes on a precision glass scale, regardless of what units you choose to specify.
Historically, there are bike parts with mm diameter and English thread pitch, such as some old French pedals.