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Re: #MISC carbide single flute milling cutter.
#MISC
Ralph
I thought the generic word "carbide" was powdered forms of Tungsten and Cobalt ? -- John |
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Re: #3D
#3D
John
see STL file.ER 32 Tray I use Mastercam v 8.1 (2002) for all my CAD and CAM. Old version but never lets me down for Mill and 3D printer, still working on g codes for my CNC lathe .Almost there. Thanks John -- John |
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Re: #MISC Making a simple 4 mm keyway slotter holder and bit.
#MISC
I forgot to add attachment.
-- John |
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#MISC Making a simple 4 mm keyway slotter holder and bit.
#MISC
Steps. see drawing. but the principle is good for any size keyway to be cut.
Turn the outer holder shank to suit. In this case, drill and ream 4 mm dia. Open up the end to 5 mm dia, finish with a 5 mm end mill to create flat bottom.depth important. Turn a up a spud, note dimensions. Slot with a 4 mm wide slitting saw to 4.2 mm deep. as you need a bit of daylight between the end of the brazed spud and the cutting bit, this ensures the grub screw?holding the bit comes down fully. Push the spud into the slot of the holder, and braze. This creates the square (rect)? for the bit. 4mm x 4.2 mm. Final op, back onto the lathe and drill and tap the end 4 mm x .75. Tool bit made from 8 mm dia drill rod, or Silver steel.using a 5 or 7 degree end mill. Hold in a J Stevenson 4 sided block. Mill all sides to 4 mm square. IE important remove 2 mm per side.using the base of the endmill. Turn 90 degree in the JS block. Using the side of the endmill mill the side rakes. to leave a witness. Mill the front rake using the side of the mill. Rotate the JS block 180 degrees and tilt using a angular parallel say 5 degrees and with the end of the mill, finish the top rake again to a witness. Harden and temper the bit and slice off with a Dremel. to suit the final length required. I prefer to leave the drill rod longer during making the bit, you need to allow extra length when holding in a collet, and something to grip on when dunking in oil during harden and temper process, put the bit into the holder after HT and Dremel off.Sparks will also tell you the HT is correct. Naturally the bit cannot be longer than the bore of the keyway to be cut, neither can the diameter of the holder bit end. Example, 10 mm dia gear bore, 4 mm wide keyway. holder entering the bore, will be 7.8 mm. or slightly less. The cutting end of the bit can be exposed say 1.5 mm. This means you can cut 1.5 mm deep of key, move back to start position, move the bit out 1.5 mm and repeat to final depth. Normally keyway depths be it in the spindle (slot) or gear are 1/2 the size of the key.The idea of square bits is that you can slide in and out of the holder without fear of rotating it and losing side position. Sounds confusing but doing it you will get the idea. Very quick to make, and reliable. Hope of interest. -- John |
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Re: #3D model railway accessories.
#3D
I love trains! The details are so amazing. Ralph On Sun, Nov 24, 2019 at 2:35 AM John Lindo <bechetboat@...> wrote: Something a bit smaller than the ER 32 trays.and I hope of interest to all my forum members. --
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer |
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#MISC carbide single flute milling cutter.
#MISC
Posted as maybe of interest to our members.
Just run a trial cutting ally, brass, plastic, PCB, laminates. Quite impressive. Solid carbide.? Maybe OK for mild steels, I will let you know. -- John |
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#3D model railway accessories.
#3D
Something a bit smaller than the ER 32 trays.and I hope of interest to all my forum members.
This is what makes this forum so different from the other stereotype forums, so basically as long as posts have a modern approach "hobbyist" flavour then there really is no OT. This includes woodworking but not the actual? chain sawing of the tree. I wanted to be a tree surgeon, but could not deal with the sight of sap LOL . My local friends hobby is model railways.He builds everything from kits and I step in now and again if he needs lathe, mill ,3D work doing. See video link and if time permits see all his You tube videos Byford model trains.videos. Very impressive, again another (how I envy) electronics engineer. All his locos (30 +) are controlled by a hand held box, the locos have a recognition system inside with a IPS code and he just taps in a 4 digit code, and away goes the loco in either F and R. The track switching is also electrically controlled in conjunction with the red and green traffic light system. IE The trains come up to a red light, it stops, and will not move until the lights turn green, how crazy is that. All trains have individual sound systems etc etc.automatic turn table again see videos. Full marks to Richard Hollows of Spain for the hours hes has spent.. Richard being from a Yorkshire wool mill town, Byford, wanted some realistic looking wool baskets. So he asked me if I could 3D print some scale basketsI said, I will give it a try.Size 12mm Long 9 mm wide 9 mm high. Tiny. So after designing from a 1945 photo of a wool basket and using a .2 mm dia nozzle, (first time) on the 3D printer the weaving details came out reasonably well.and I printed 28 at at a time.time to print 1 3/4 hours. Also printed 4 baskets with a hinges and hollow inside, the wool seen inside is a "q" tip.Tiny. Already Richard has sprayed them with a mini paint gun to simulate that "worn" effect. Hope of interest. -- John |
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#GR
#GR
To cold to play here this Sunday morning, relatively I know even colder or hotter for other Aussie members, so i am? messing about playing catch up on the forum.
GR Mk 2, photo and video of the system when powered up. I have a spare motor and control box, ( this one just repaired by Richard UK) thanks mate. -- John |
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#MISC Something different.
#MISC
Attached a couple of photos of a LH digital vernier.
Very useful when working on small machines, the scale projects toward the operator? and not hitting the column of the machine. The only place i know where to purchase is Amadeal UK, but I am sure surfing the web, there must be other tool outlets. Hope of interest. -- John |
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Re: #3D
#3D
Ref ER 32 collet tray.
I will do. I can send the STL file, or g code ? the time to print just about 13 hours.PLA. -- John |
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Re: #GR
#GR
Reference Mini lathe. 125 mm dia chuck. I use very regularly.
I am still looking for an electrical device to put inline a?"soft start" when turning on the spindle using the 125 mm chuck only, due?to the extra static weight . I do not want to shock the machine when it kicks in. The 80 mm and 100 mm dia chucks are not an issue. I understand there are 4 setting? "pots" BIOS ? whatever they are called, on the main board that adjusts the way the motor behaves, but I am nervous to fiddle with these away from the original factory settings. As in my past posts, I admit? I am not an electrical engineer, so any help would be appreciated. Ideal situation would be to be able to isolate the "soft start" when the 125 mm dia chuck is not in use. But at this moment, as it is not a show stopper, provided? I get into the habit of turning the spindle start on slowly all works OK. I can post the mounting plate dimensions/drawings of a mini lathe 4" spindle to 5" chuck if of interest. The Chinese "Sanou" brand of chucks, MAGIC, for quality, price, exceptional, concentric holding on the both sets of steel jaws incredible accuracy.? -- John |
John Lindo