Good Morning Mr. Paco!The lower two peice roller also requires a crown to help aid in belt tracking.
A square demonstrates the amount of crown.
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The calipers show a difference of .0405" (center measurement).
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The side cover shows the groove from a poor tracking belt.
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More cast iron parts ready for masking.
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The trunnions painted and test fitting.
Notice the unpainted contact surfaces.
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Almost ready for paint.
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The knobs were painted with aluminized header paint and cured in the BBQ grill at 250º for 40 min.
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More to follow.
As a side note, tomorrow is my last day at work. My last 24 hour shift... Tuesday morning I'll turn in all my gear and check out from the Tucson Fire Department after 30 years. I plan on working in the shop but at a slower pace and more on personal projects.
I will add further posts of the finishing machine on Wednesday.
PacoGood evening Ben,
Thanks for the kind words. It was a haul but seems like 15 years was yesterday never mind 30 yrs. Had a great last shift with my crew. Nothing exciting from just medical calls but overall mellow. My Captain brought in Rib-eyes and cheesecake for desert. We actually enjoyed out meal without interruption so that was a bonus. After dinner the presented me with this beautiful custom Ax and rock.
The ax locks into the anchor rock and can be removed by pulling the handle up.
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A close up if the nesting fit. The Ax head reads "USA"
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The rock weighs over 100 pounds with no real place to grip it. I'll dolly it in and find a spot in the office.
They know me well and figured on a unique gift. Gonna miss all of my 620 brothers and sisters but it's time to move on.
I hear you on projects, I need to paint the exterior of the house and remodel the kitchen before I hit the open road.
Thanks again for the warm wishes Ben!
Tucson Fire purchased a new Titanium (Ti) stokes litter that breaks down into two pieces. They cover a popular area used by mountain bikers and hikers. There's been times when a rescue could require a fair amount of hiking to reach a stable injured victim. The new break down litter can be carried by two separate rescuers in specially designed back packs.
The problem was the new Ti litter is wider than the old one piece Ti litter so the "big wheel" would not fit.
The big wheel is attached to the litter once a victim is secured and ready to be hauled out. The wheel allows 4-6 rescuers to traverse technical (low angle) terrain while maintaining control of the victim.
Once the litter is assembled the "big wheel" is secured to the middle creating a center of gravity (CG). Those loop handles can be rotated out independently in small increments as they are splined. This allows for different heights of rescuers to maintain agronomics.
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The modification required a longer axel allowing the wheel frame to engage on the widest center portion of the litter.
The original axel with offset snap ring grooves and 1/2-13 threaded ends. The rim is offset so this required the axel grooves to be offset to center the wheel assembly over the litter.
The stock used to turn a new axel is .750" A2 tool steel 4" longer than the original.
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After facing and turning down to .497" the threads were cut. The 5C speed chuck collet system works well for this type of work.
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The nuts threaded in nicely.
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With both ends threaded the new operation was to cut the snap ring grooves. I used the digital readout (DRO) to measure from the end of the axel to where the groove need to be. The cutter used was a custom ground High speed steel (HSS). The width and depth were also done using the DRO.
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The finished product.
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The last modification to the wheel was replacing the 3/8"-16 All-thread section with a 4" longer SS version. This has a hand knob that created the clamping force on the litter frame backed up with four aircraft detent pins.
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A closer look at the new axel.
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mentioned previously, the offset snap rings grooves compensates for the rim offset keeping the tire centered.
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For those of you with detailed eyes, you've probably noticed a different lathe. I will add the journey of the the new bigger lathe soon. This will be a long post but I think some might find interesting.
Have a great day folks!
Turn and Burn!
Good morning brother!Good morning Paco
I have a great idea that would be a win win situation.
I know of a guy, recently retired firefighter, that rebuilt a combination belt/ disc sander. ( one I probably bid on few yrs. back) Any way seeing as the prairie fires are active here in Ks. ( sometimes too close to home)I figured you may want to stay sharp in firefighting skills, and load up that machine you probably really will never use, and deliver it out here to me.
Sounds like a win ,win. Well O/K that's my story and I'm sticking to it
Good job Paco Enjoy!
Yes SirGood morning brother!
Nice try on the Disc/Belt sander. I can't fault you for asking as that knucklehead did a decent job rehabbing the machine and it would be hard to part ways with it.
I just read yesterdays fire report in Kansas, looks like the red flag warnings are continuing.
Current Fire Situation in Kansas 4/1/21, afternoon update This report is updated as conditions warrant, daily or more often during active fire season, much less frequently during the off-season. Highlight: Very High to Extreme fire danger Friday in much of the state through the weekend. RH w...docs.google.com
I hope your in a safe area and if you'r on property, clear a good area around your structures.
Let's pray for some rain brother.
Happy Good Friday and happy Easter!
Sounds like a beautiful homestead and you have the means to protect.Yes Sir
Out in the country not quite 40 acres all pasture, house on a hill about one acre of ground , with sprinkler system.
Having problems getting someone reliable to swath and bail native prairie grass.
I usually mow pasture about fourth of July, and again labor day or so. Grass out here will be 5 to 6 ft tall by end of summer.
Always keep mowed and trimmed .
Unfortunately lots of people don't, then can't figure out why their homes get destroyed.
Our son was on fire dept, had to teach him how to drive out here in the sand, and not get stuck, taught him to drive old military trucks with no working clutch, and at times no working brakes. Sorry to have to say it but the goofy training officers had no idea. They were always stuck. City boys.
Everyone have a Fantastic Good Friday . Enjoy a Wonderfull Easter Sunday.
BURN & TURN
Yes SirSounds like a beautiful homestead and you have the means to protect.
I hear you on the City slickers of today, heck many can't drive a stick let alone drive a manual without using the clutch. My son's first car was a six speed and two of his three rigs are manuals today. The first time he witness me shifting clutch-less, he was like What? I had him shifting clutch-less within 30 min. A good skill to have and will get you home if you loos your clutch.
Stay safe and keep a close eye on the changing weather conditions.
I was red card certified (wild land) for several years but I'd rather take my chances inside a burning building than trust the weather.