MetalworkingFun Forum
Todays Project - What did you do today? - Printable Version

+- MetalworkingFun Forum (http://www.metalworkingfun.com)
+-- Forum: Machining (http://www.metalworkingfun.com/forum-5.html)
+--- Forum: Projects (http://www.metalworkingfun.com/forum-7.html)
+--- Thread: Todays Project - What did you do today? (/thread-727.html)

Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552

I finally finished something! - wawoodman - 11-06-2015

I finally completed a project! It's a toolrest for my vintage Jet 8" grinder, with an extra-large table. Once I finish the South Bend style bit holder, I should be able to sharpen a little more accurately.

And the coolest thing? I only had to make one part twice!   Smiley-dancenana

(Yes, I shamelessly modeled it after the Veritas in the background!)

RE: Todays Project - What did you do today? - DaveH - 11-07-2015

That is very nice Mike Smiley-signs107   Thumbsup 
Smiley-eatdrink004 
DaveH

RE: Todays Project - What did you do today? - Mayhem - 11-07-2015

I agree - looks like a bought one.

RE: Todays Project - What did you do today? - Vinny - 11-07-2015

I think it looks better than the Veritas.

RE: Todays Project - What did you do today? - Highpower - 11-07-2015

(11-06-2015, 01:49 PM)f350ca Wrote: Thanks Kenny, actually a V-four and a 350Ci.

Bad news Greg. You may have a problem with your compressor warming up on cold starts. Chin

You are missing the heat riser tube... Rotfl

RE: Todays Project - What did you do today? - arvidj - 11-08-2015

As noted in another post I've decided to try making machinable wax. Got the ingredients together. I weighed them not so much for "accuracy" as to keep a  record for repeatably.

65.2 oz. paraffin
16.3 oz. virgin HDPE pellets
3.3 EVA - ethylene-vinyl acetate tubing

[attachment=12138]

I set up the hotplate, kettle and molds on the garage floor ...

[attachment=12139]

Turned on the hotplate and and started adding blocks of paraffin. They started to melt and eventually I got them all in the kettle. The temperature seem to be pretty stable around 165F (75C) during this process.

[attachment=12140]

After all the paraffin had melted I turned the hotplate up and as the paraffin temperature rose past 300F (150C) added a very small amount of HDPE pellets. It quickly became obvious that the paraffin was not hot enough to melt the HDPE as the pellets just sank to the bottom of the kettle. But once on the bottom the heat of the kettle bottom was enough to soften them into [warning, very technical term ahead] a 'goo'. I continued to sure the paraffin, scrape the goo around the bottom of the kettle and allow the temperature to rise. Eventually it got up to 350F (175C) and it looked like HDPE was beginning to dissolve.

[attachment=12141]

I let the mixture continue to heat. Even thought the documented melting point of HDPE is 266F (130C) it looked like there was some, but no a lot happening at 350F (175C). I continued to add HDPE pellets and stir the goo. I did not have a clue about the EVA tubing. It was recommended as an addition to make the HDPE less brittle and was suppose to melt at reasonably [in this context anyway] low temperatures. As it turns out the tubing was probably not a good source for EVA. I put them into the mixture and eventually brought the tempurature up to 410F (210C) which seems to have done the trick for the HDPE but was not enough to dissolve the tubing. True, it went thru an "in serious need of Viagra" stage and eventually reached the 'goo' stage but I was not able to get all of it to dissolve. Additional research for a source of EVA is a project take-away.

Not wanting to tempt fate with higher temperatures or additional time I used a metal soup ladle [Goodwill was a major tool supplier for this project] and filled the molds I had laid out. All in all the "turn the hotplate on to pour" time seemed to be about 90 minutes.

[attachment=12142]   

After ensuring that everything seemed to be safely cooling I made a side trip ... metal plate gift ... Upon return I noticed that the round pours had a serious case of the 'voids' on the top but the rectangular items, though they looked like they had concave tops, did not seem to suffer as much. I used a Dremel cutoff wheel to remove the round cans from around the wax. The final results ...

[attachment=12143]

Now all I need to do is see how well this works in the lathe and my little mill.

It is suggested that machinable wax is reusable, assuming you can gather up all of the swarf and small chunks. The plan for that is to use a shopvac that I got for free on the local FreeCycle list. I cleaned it up and it will be dedicated to machinable wax cleanup, unlike the regular shopvac which is dedicated to anything that is small enough to fit up the hose and not fastened down.

Anyway, that is the plan,
Arvid

RE: Todays Project - What did you do today? - dallen - 11-08-2015

the wax I made, I had good luck with it turning loose from Teflon coated baking pans and plastic potato salad tubs.

I used a recipe of paraffin and the blue tops off of 5 gallon water bottles, mix was a couple pounds of paraffin and as many tops as I could stand to stir in the pot, you do have to pull the Styrofoam gasket out of the tops, which you can usually get for free from some place that bottles water.

RE: Todays Project - What did you do today? - RobWilson - 11-08-2015

Smiley-signs107 Arvid ,  nicely documented , I hope you will report back on its machining properties . A friend of mine  added a few wax crayons to add a blue colour to his batch .. 

What's your plans for the machineable wax ?  


Rob 


PS what did I win  Big Grin

RE: Todays Project - What did you do today? - zmotorsports - 11-09-2015

Didn't get a chance to machine anything over the weekend but I was able to get a lot of little things done in order to prepare for winter here in Northern Utah.

Friday night I winterized the fresh water system on our coach.  Saturday I changed the oil, oil filter and coolant filter then pressure washed the under-carriage before putting her to bed for a few months.
[Image: 15hjde.jpg]

I put the hardtop on the Jeep a few nights ago but Saturday afternoon I pulled the Jeep in and serviced it along with rotated the tires.
[Image: sqp6aa.jpg]

Then yesterday after the wife and I returned from breakfast I threw her car on the lift to service it and rotate the tires.  We should now be good until after the holidays so I can get some other things done.
[Image: 10gwye9.jpg]

Mike.

RE: Todays Project - What did you do today? - Pete O - 11-09-2015

A mate lost one of the fairlead rollers off his vehicle winch. Made a replacement from 4140SH with delrin bushes, just what I had available. Hope he doesn't decide to lose the other three rollers now.
[attachment=12182]