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  1. crossthread

    Slightly OT: Has the specification for wire gauge changed?

    I had to move a compressor this week which is wired from the shop with #12 UF cable. I bought a roll of #12 UF cable to extend the wiring to the new location. The existing wire was buried probably thirty years or so ago. The new wire is absolutely smaller then the older #12. I even double...
  2. crossthread

    OT: Keeping stationary diesel engine batteries in parallel charged

    I have two 12 volt deep cycle batteries wired in parallel on a diesel generator set. It does not get run a lot so I need to keep some type of charger on the batteries. One of the batteries is new and the other has some age on it but seems fine when tested. The charger I am using is automatic in...
  3. crossthread

    OT-Precison vs acccuracy

    OT-Precision vs acccuracy My wife and I went to buy a new thermometer for the porch yesterday and out of a box of 20 or so thermometers, none of them displayed the same temperature. She said that they could not be accurate because they all read differently. A very astute observation on her...
  4. crossthread

    Machining a slight radius in gauge block

    This is kind of an oddball project that has been handed to me. Material is 1/4" AL. One inch wide by six inches long. It is to be used as a caul for bridge work. If the caul was sitting on a surface plate the center would be 1/8" up from the plate. I have no idea what the actual radius is and it...
  5. crossthread

    Looking for cheap one axis DRO with diameter mode

    Good morning. I have a very nice 9"SB that I am going to give to my grandson for Christmas. He is getting interested in machining and I think this would be a good start for him. I am looking for a very inexpensive one axis DRO with diameter reading capabilities. Two axis would be fine but I only...
  6. crossthread

    OT- Home humidifier choice

    Good morning. I have a question about a home humidifier. I know this is way off topic but I have seen this sort of thing discussed here and it seems that there are quite a few people with HVAC experience. As of late my wife and I have been experiencing the side affects of very dry air. I was...
  7. crossthread

    Question for those that machine silicon bronze

    I am not trying to machine this but rather need to know what to do with it. I inherited a 1000' spool of 1/2" silicon bronze cable that my dad bought to re-rig his sailboat. I inherited the sailboat and the cable when he passed away. My question is, for those of you who might machine this, does...
  8. crossthread

    OT- machining a relay contact

    This is sort of OT but it does pertain to machining somewhat. I have a Samsung dryer that would not start but would run when you gave the drum a push. Start winding, capacitor or something like that for sure. I pulled it apart and found a start switch mounted on the side of the motor which is...
  9. crossthread

    Why does my lathe bore tapers?

    First of all let me state a few things which should eliminate a lot of conjecture. My lathe does not turn OD tapers. I have however had problems over the years boring tapers. I have tried different bars with more or less the same results. This is not heel drag, tool geometry, or any of the...
  10. crossthread

    What steel to use for cross pins joining two shafts?

    I get the weird jobs nobody in this area wants to mess with. I swear ten guys will come into my shop and they don't have a full set of teeth between them. Anyway I have to cut two pto shafts and join them together. The reason being that one of the splines in no longer available. Anyway I've been...
  11. crossthread

    Slightly OT: Would a parting tool make a good knife?

    My grandson wants to make a knife from scratch and he asked me to help him a bit. I am not a knife maker so I have never had to make any decisions about what type of steel to use. My question is, would a parting blade make a good blade for a knife? It already has a bit of taper which should cut...
  12. crossthread

    Somewhat OT: Solar panels on shop roof

    I have been watching commercials about solar panels being installed on residential and commercial roofs. The manufacturers claim forty year service life for the panels with noted degradation of the output over time. They look like they are installed on a grid system attached to the existing...
  13. crossthread

    Determining strength of shrink fit

    Is there a non destructive method for determining how much torque can be transmitted through a shrink fit. I am assuming if you know the coefficient of expansion for the two materials, the amount of interference, the amount of contact area etc., a pretty close approximation could be found, but...
  14. crossthread

    My new toy.

    Just got the parts to repair this. Works great now.
  15. crossthread

    Meethod of cutting herringbone gear

    Method of cutting herringbone gear I need to cut a herringbone gear for a repair job. Not that it really matters but the gear is 8" in diameter and over 60 years old. I can't figure out exactly how this was done. I have cut plenty of gears but never one like this. My question is this. Would it...
  16. crossthread

    Mounting collet chuck on lathe

    I bought this collet chuck for my son to go on his Monarch lathe that I gave him some years ago. Does this look like a standard "D" mount? I did not have the lathe in my shop long and never took the four jaw off of it when I had it. I wanted this to be a surprise so I can't do a lot of checking...
  17. crossthread

    Awesome Nuts

    As a retired Urologist I thought I had seen every kind of nut imaginable.......just kidding. My son is a mechanical engineer at Philip Morris. They have allthread screwed into anchors in the concrete ceilings which hold various cable ways and pipes in fours layers. He was working up a work order...
  18. crossthread

    OT: Charging two batteries in parallel

    I have two 12volt batteries on my sailboat. They are connected through a three position switch which can connect battery A , battery B or both to the distribution panel. When I got the boat there were two trickle/maintenance chargers with one on each battery. One of them has died. My question...
  19. crossthread

    Knurling pistons

    I have an old single cylinder engine that is burning oil and the skirts are slapping. I know that back in the 40's and 50's, pistons were knurled to reduce the clearance. I would like to try this but have no experience with it and can't find a lot of information on specifics. Let me say that...
  20. crossthread

    Is the correct term planing or shaping?

    I got into a discussion recently with a friend who wanted me to "plane" a part for his steam engine. Being the pedantic type, he informed me that if the part was stationary with the cutting tool passing back and forth over the stock, it was referred to as shaping not planing. If the cutting tool...

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