On Sunday, January 21, 2018 at 4:13:59 PM UTC-5, Leon wrote:
On 1/21/2018 12:48 PM, DerbyDad03 wrote:
On Sunday, January 21, 2018 at 1:34:30 PM UTC-5, Leon wrote:
On 1/20/2018 11:39 PM, Martin Eastburn wrote:
Good one Leon -
My dad also worked for Western Electric and Bell Labs.Â* He started in
the 20's in a vacuum tube plant in Chicago.Â*Â* I have his Iron some hand
tools and tool pouch.

Actually I may have a pair of Western Electric side cutter and long nose
pliers. AKA diagonal and needle nose.

How long of a cord do they have? ;-)


I know you are kidding... But the Western Electric soldering iron
probably has a cord that is 20' long IIRC. I recall it being very long.

Many of us have a problem judging length. ;-)

On 1/21/2018 11:54 AM, Puckdropper wrote:
....

No rush, and now that I think of it they might have used helical gears.
I can cut a spur gear without much trouble, but helical is another story.
I'm not going to be able to cut a helical gear with my current set up.

I wonder if I could cut a form into a piece of O1, then use that like a
milling cutter with a rotary table to make the helical gear?

Obviously I can't promise anything, especially if they're helical gears.

Puckdropper

That's good there's no rush since it's probably been nearly 15 years
since I've had one functional.

I did buy one off eBay a few years ago that is still functional but it
has some motor "issues" -- it runs, but not well and I've not taken the
time to delve into it much.

There's one w/ the cover off been sitting on a bench for years in one of
the garages--I glanced at it today and it is indeed the rotor end that's
the most worn of all; does look like it's straight gear but it's milled
directly in the rotor shaft; not tied onto the end. Not sure if doing
anything with that would be feasible unless could fill in the missing
metal and recut...

That one was never finished tear-down; still grease-covered (with a lot
of accumulated dirt/sawdust since ) so I'll have to clean it up or
get one of the other sets of parts to make pictures of and take some
measurements.

I have a Makita that is about closest there is on market to match but
they took a 4" machine and just put 3" rollers on it so it's too wide
for the belt and unbalanced left-right because weight isn't centered
over the belt. The little 3-wheeler looks kinda' cute and might be
nice, but they're just 3x21 so all the 24" belt stock is useless...

I've requested numerous times B&D bring the 7440 back with a little
better gearing, but never got anywhere obviously.

--

dpb wrote in news
On 1/21/2018 11:54 AM, Puckdropper wrote:
...

No rush, and now that I think of it they might have used helical
gears. I can cut a spur gear without much trouble, but helical is
another story. I'm not going to be able to cut a helical gear with my
current set up.

I wonder if I could cut a form into a piece of O1, then use that like
a milling cutter with a rotary table to make the helical gear?

Obviously I can't promise anything, especially if they're helical
gears.

Puckdropper

That's good there's no rush since it's probably been nearly 15 years
since I've had one functional.

I did buy one off eBay a few years ago that is still functional but it
has some motor "issues" -- it runs, but not well and I've not taken
the time to delve into it much.

There's one w/ the cover off been sitting on a bench for years in one
of the garages--I glanced at it today and it is indeed the rotor end
that's the most worn of all; does look like it's straight gear but
it's milled directly in the rotor shaft; not tied onto the end. Not
sure if doing anything with that would be feasible unless could fill
in the missing metal and recut...

That one was never finished tear-down; still grease-covered (with a
lot of accumulated dirt/sawdust since ) so I'll have to clean it up
or get one of the other sets of parts to make pictures of and take
some measurements.

I have a Makita that is about closest there is on market to match but
they took a 4" machine and just put 3" rollers on it so it's too wide
for the belt and unbalanced left-right because weight isn't centered
over the belt. The little 3-wheeler looks kinda' cute and might be
nice, but they're just 3x21 so all the 24" belt stock is useless...

I've requested numerous times B&D bring the 7440 back with a little
better gearing, but never got anywhere obviously.


Regarding the motor gear: the other option you have is to grind off the
gear teeth and start with a smooth shaft. It'd be much easier to cut a
gear with that bore than it would to cut a gear on that shaft.
Especially if we're talking about filling in new metal, where there's
very little chance of things being a consistent hardness.

Puckdropper
--
http://www.puckdroppersplace.us/rec.woodworking
A mini archive of some of rec.woodworking's best and worst!

On 1/22/2018 1:07 AM, Puckdropper wrote:

....[snip for brevity]... dpb

Regarding the motor gear: the other option you have is to grind off the
gear teeth and start with a smooth shaft. It'd be much easier to cut a
gear with that bore than it would to cut a gear on that shaft.
Especially if we're talking about filling in new metal, where there's
very little chance of things being a consistent hardness.

Puckdropper

Indeed; it would be teeny to cut all the teeth down but to make
concentric and round wouldn't be too hard. Oh, but then there would be
very little room left between new ID and existing OD to match existing
size to match up with the driven...but, I suppose, still at least in
realm of possible...

--

On Mon, 22 Jan 2018 08:06:29 -0600, dpb wrote:

On 1/22/2018 1:07 AM, Puckdropper wrote:

...[snip for brevity]... dpb

Regarding the motor gear: the other option you have is to grind off the
gear teeth and start with a smooth shaft. It'd be much easier to cut a
gear with that bore than it would to cut a gear on that shaft.
Especially if we're talking about filling in new metal, where there's
very little chance of things being a consistent hardness.

Puckdropper

Indeed; it would be teeny to cut all the teeth down but to make
concentric and round wouldn't be too hard. Oh, but then there would be
very little room left between new ID and existing OD to match existing
size to match up with the driven...but, I suppose, still at least in
realm of possible...
How about pressing out the existing shaft and replacing with a new
one??

On 1/22/2018 10:43 AM, Clare Snyder wrote:
On Mon, 22 Jan 2018 08:06:29 -0600, dpb wrote:

On 1/22/2018 1:07 AM, Puckdropper wrote:

...[snip for brevity]... dpb

Regarding the motor gear: the other option you have is to grind off the
gear teeth and start with a smooth shaft. It'd be much easier to cut a
gear with that bore than it would to cut a gear on that shaft.
Especially if we're talking about filling in new metal, where there's
very little chance of things being a consistent hardness.

Puckdropper

Indeed; it would be teeny to cut all the teeth down but to make
concentric and round wouldn't be too hard. Oh, but then there would be
very little room left between new ID and existing OD to match existing
size to match up with the driven...but, I suppose, still at least in
realm of possible...
How about pressing out the existing shaft and replacing with a new
one??

I'd guess that not possible from the rotor that I suspect the windings
and all are such that wouldn't be able to get the shaft out without
destroying it...but, I can look at how it's assembled.

--

On 1/22/2018 10:43 AM, Clare Snyder wrote:
....

How about pressing out the existing shaft and replacing with a new
one??

'membered model number off by a digit -- it's 7450 instead 7440.

Here's bestest schematic found...gives an idea how it's built; the rotor
19 and gears 16,18 are the weak links; 5 and 10 never show any
significant wear at all...

https://www.toolpartsdirect.com/blackdecker-7450-type-2-belt-sander-115v.html

--

On 1/18/2018 1:01 PM, Electric Comet wrote:
mine is a skil saw from the 70s i think

seems to run fine

am curious because i wonder if they can become unsafe to use in the
electrical sense and what to do besides replacemnt

guessing that replacement parts might be hard to come by


I don't know. Maybe an old Skill jig saw I picked up as a toss in to
sweeten the deal on a grinder and drill press private purchase.

My tools have always been used hard. Most of the stuff I bought my
first few years as a contractor has been worn out and tossed. Sure I
could have fixed some of it, but it wasn't worth the time. Even the
good stuff. My time was more valuable getting jobs done for customers.

Now I'd fix it because I spend a lot of time watching CNC mills and
routers do my job for me. Nah, not really. If I am not programming, I
am designing. If I am not designing I am fixing a machine. If I'm not
fixing a machine I'm doing some off the machines fabrication or doing
some manual machining.

Now, when it comes to hand tools and machinist tools I have some old
stuff. I've got a few precision measuring instruments and misc tools
that might date back to the late 1800s. Certainly WW1 era. Some of them
I still use. No bull.