Stuff you have made today

[Guzrik]

I've never done anything like this, but could you mill slightly 'too deep', so there's less material to remove manually? Like this:
View attachment 360724
Yellow line is milling pass, then you've only got the two corners in blue to square off. Blue dotted line shows where the base of the key would sit, obviously it's the sides of the key that are taking the load not the base so it doesn't need much contact area, just enough to stop it moving.

Theoretically this would be possible, however in reality the long (50mm?) endmill can not cut accurate enough, depending on required quality of work.
The fit on the sides of this type of key determines the service life of the connection. Tigth fit and contact over the full surface area is the best, achieved only with a broach or a file and lots of effort. Milling as proposed can help to remove some material first.

 

[striker]

Theoretically this would be possible, however in reality the long (50mm?) endmill can not cut accurate enough, depending on required quality of work.
The fit on the sides of this type of key determines the service life of the connection. Tigth fit and contact over the full surface area is the best, achieved only with a broach or a file and lots of effort. Milling as proposed can help to remove some material first.

I might spend half an hour making a single point broach out of some 16mm bar with an 8mm hss cutter. Then just one thou cuts. I'm in no rush.

 

[bricol]

I think I've worked out what you mean. Rather than plunge, lower the end mill to full depth of the inside of the pulley, then come in from the side. That's not a bad idea. I will probs need a longer end mill though.

Apologies, poor wording on my behalf - I'm not a machinist! Plunge should do it, as long as you end up with straight sides to the keyway to locate on the key.

 

[bricol]

I've never done anything like this, but could you mill slightly 'too deep', so there's less material to remove manually? Like this:
View attachment 360724
Yellow line is milling pass, then you've only got the two corners in blue to square off. Blue dotted line shows where the base of the key would sit, obviously it's the sides of the key that are taking the load not the base so it doesn't need much contact area, just enough to stop it moving.

If you've got enough material, you don't need to square off, as long as the straight sides locate on the key, and you retain the key with a socket set screw through the pulley hub.

Its not exactly British Standard, but should work okay in this application.

 

[striker]

Success with the keyways. Made a broach out of 16mm tool steel. Piece of 8mm hss. Gentle cuts. No side clearance, no top clearance just 7° ish behind cutting edge. I know cast iron is supposed to be cut dry but I used a little cutting oil. One down one to go. Had to bodge a spindle lock!

 

[Fraserb]

Finished harvest on Friday, now on planting next crops.

 

[Kram]

I havent done much of the projects for ages.. strip of steel cut for a taller plaster pouring flask. Next to drill lots of holes, and welding into a circle.

 

[8ob]

Today I laid a big old Cedar to rest, cut it up into short sticks for milling.

 

[mr migwire]

Do i see a 7 1/4 inch HST power car. Or maybe bigger than that?

you do indeed, just been fitted with a new electric start diesel engine, controls are going in and then onto paint.

 

[nickk]

Components for some gates and fencing,lots of smithing in this job,riveted joints aswell,more to follow.

 

[Roger440]

you do indeed, just been fitted with a new electric start diesel engine, controls are going in and then onto paint.

Excellent. Is that direct drive of some sort or is it using traction motors?

 

[indy4x]

Vertical compressor tank, recently blasted, makeshift spray booth and let it have some primer



Stand it up tomorrow and prime the rest of it

 

[Maker]

I made a nice tidy controller for my microscope, one switch turns the lamp on and off, the other two zoom in and out, and move the head up and down for focus. Tie wraps are only temporary, but I haven't decided how to fix it permanently.



The blue board is a breakout for a dual H-bridge IC, the resistors pull its inputs high to put it in a short brake state, the switches take one input at a time low to turn the motor clockwise or anticlockwise. I tried doing it without the IC, but ended up with eight relays and essentially built two H bridges . The one relay on the board is for the lamp, it's 50 watts running on 5VDC, the switch is only rated for 6A AC. The white flex carries 5v and 12v from a power supply, it's not live and neutral as the cores might suggest.

Unfortunately, it doesn't work, it zooms out but not back in, hopefully I just pulled a wire off when I stuffed it in the case.

 

[mr migwire]

Excellent. Is that direct drive of some sort or is it using traction motors?

the diesel has a v belt drive to a forward / reverse single speed torque convertor box which has an inbuilt clutch, that then runs a drive chain to both axles of the rear bogiw.

 

[Hood]

Both related but for different people.
Last week I altered the back of a wheelhouse to shift the door from the starboard side to the port side so that the skipper could fit a chair in front of the wheel without having to try and squeeze past. He is loving the door being at the port side but he couldn't easily get on the chair as it is one of these JCB style ones and springs high when no load on it so I made this wee step for him to get up high enough

This is a base for my own computer chair at home, a lovely seat from a Subaru legacy Spec B. I previously had a base cobbled together from steel but decided to make one from Alu instead.

 

[DAPPH]

Both related but for different people.
Last week I altered the back of a wheelhouse to shift the door from the starboard side to the port side so that the skipper could fit a chair in front of the wheel without having to try and squeeze past. He is loving the door being at the port side but he couldn't easily get on the chair as it is one of these JCB style ones and springs high when no load on it so I made this wee step for him to get up high enough

View attachment 360878


This is a base for my own computer chair at home, a lovely seat from a Subaru legacy Spec B. I previously had a base cobbled together from steel but decided to make one from Alu instead.

View attachment 360879

Not got a lot of work on at the minute Hood?

 

[Hood]

Not got a lot of work on at the minute Hood?

Just finished a couple of biggish jobs so relaxing for a day or two

 

[selectedgrub]

With all due respect ain't no tree hugger but what is there to like here.
Am I missing something?

Today I laid a big old Cedar to rest, cut it up into short sticks for milling.

 

[galooph]

With all due respect ain't no tree hugger but what is there to like here.
Am I missing something?

Appreciation of @8ob's talent in felling such a big tree safely, making it look easy

 

[8ob]

With all due respect ain't no tree hugger but what is there to like here.
Am I missing something?

You are right, I promise not to post up any more tree stuff.

Bob