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Clickspring in his YouTube videos shows how to package the part in Boric Acid, e.g. in his video 'How to make a square broach'. You wind the part with light iron wire, make a paste of the boric acid with white spirit, apply it and put the whole thing in a piece of steel tube so you will not...

The yellow stuff is the leather collar of the leather welding jacket. The cap is a fully wooden wintercap. But you are right, the overlap is the wrong way around. I will get Jacob (and myself) better caps with good neck protection.

Point well made, sir. I will advise my grandson. His hat however is not cocked - you look at his rightear protection flap which together with a fullsize neckflap and a similar leftear protection flap should provide good protection while welding underhand.

In general I'm weary of heat and fumes in my wood-walled shop, so my grandson Jacob at 14 yrs welded me a heattreatment trolley so I can work heat in the open. For silversteel and regular toolsteels the oil hardening temperature is around 800 degrees Celsius. My EFCO150 oven is on top with next...

Do you have acces to a mill? A friend of mine will machine up to 40" flywheels on a turntable on his Bridgeport.

A year ago I got a good deal on a small EFCO 150 oven with inner space of 160x85x195 mm and temperature up to 1100 degrees Celsius. More than enough for hardening small tools and parts at around 800 degrees Celsius. I have a simple SOLO controller attached which basically has two modes 1)...

Your reckoning is correct. And she lived to be 102 years old, independantly, in her own house.

Nothing wrong with the dim and distant past. My grandmother told me that as a 12 year old girl in 1902 she occasionally had to threadle the lathe for my great-grandfather, and that she still can feel the difference between steel and brass.

For milling slots I must confess I use any of my limited assortment of endmills that is about 0,5 - 1,0 mm undersized and has cutting edges at the end. I plunge right in with as only precaution centerdrilling first, just like with drills, as the center of the mill will of course not cut. This...

Pure greed once led me to buy a set of 92 (now 91) Hommel Class 1 Precision gauge blocks. To my amazement I use the set quite often. In the first place on the lathe between carriage stop and carriage, in the second place to measure slots and in the third place to measure and set angles with a...

It is my understanding that there are two main methods of grinding drills. The first method is forming a slanted cone for each cutting edge. This cone will have the right cutting angle at the cutting edge and then drop off leaving space for the chips. You can form the cone with a grinding tool...

Sir, as I understand the #5 taper is 0,0526 inch per inch and the SB special taper has the size of about a #5 taper but the angle of a #3 taper, or 0,0502 inch per inch. The difference is 0,0024 inch or 0,06 mm. As you can enter a dial indicator with an arm easily about an inch or 25 mm into...

Good to see from the many comments that drilling is still the Mother of Manufacturing, a firm descendant of Stone Age Technology.

Kwoodhands is right in my opinion to start with a spotting drill rather than a center drill. A center drill prepares a hole for a center, thus has a top angle of 60 degrees and also makes a little top-pocket to protect the sharp point of the center. When you enter such a hole with a 118 degrees...

Sir, I'm impressed. It is quite possible that in my nick of the woods you would be considered as something more than your average hobby machinist.

In professional manufacturing designing and producing a good pressfit is complex at best. Materials, elasticity, wall-thickness and surface finish are just a few variables. We hobbyists have the luxury of not being able to make to measure. In Europe a quality 6 tolerance on shafts means a...

In horology we hold thin brass wheels by soft-soldering them to a brass disc.

If you are afraid of damaging the piece with a rap of the hammer, you also can dip the whole in boiling water. Superglues hold till about maximum 80 degrees Celsius, so it will float right of.

Over here we also mostly use a similar product to the Harbor Freight 4x6 bandsaw. A couple of remarks 1) the made in Taiwan variety is better than the made in China variety 2) The little wheels to move it around are worthless, better to mount the thing on a wheeled platform, so you can easily...

The first job on the TAIG was making 4 pillars from brass hexagon 5,5 mm, cutting and facing at length 90,0 mm and tapping thread M2,5 mm at both ends. The machine works OK, everything is close to hand and has a solid feel. It was a pleasure to get in quick change-over the right speeds: 4000...