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

RE: Todays Project - What did you do today? - TomG - 01-11-2013

Totally radial!

Every time I grind a form tool to turn a radius on the lathe, I think about making one of these. One of these days...

Thanks for posting the pics. Thumbsup

Tom

RE: Todays Project - What did you do today? - rleete - 01-11-2013

Do it! Making balls or ogives is very fun. Almost magical how they take shape as you cut.

Round knobs can be used dozens of places, so making them is not wasted effort.

RE: Todays Project - What did you do today? - EdK - 01-11-2013

How fortuitous! I was tweaking my drawings for a ball turner just this morning. Smile

Ed

RE: Todays Project - What did you do today? - ml_woy - 01-11-2013

(01-11-2013, 12:41 PM)EdK Wrote: How fortuitous! I was tweaking my drawings for a ball turner just this morning. Smile

Ed

A machinist friend suggested putting the set screws in the tool post to allow for minute adjustments of tool height, I thought that was a smart idea.

RE: Todays Project - What did you do today? - EdK - 01-11-2013

(01-11-2013, 03:39 PM)ml_woy Wrote: A machinist friend suggested putting the set screws in the tool post to allow for minute adjustments of tool height, I thought that was a smart idea.

That makes sense. I was wondering how one would make that type of adjustment other than using shims.

Hmmm, this gets me thinking about some changes to my design. Chin

Ed

RE: Todays Project - What did you do today? - rleete - 01-12-2013

For mine, I used a 1/4" round carbide bit. Was a scriber point in a past life, but the tip had snapped off. I made it a rounded point on the grinder at work.

To get it exactly on center, I mounted the turning attachment on the lathe, and drilled it with an undersized bit, then reamed. It's as dead on center as I can possibly get it.

RE: Todays Project - What did you do today? - Mayhem - 01-12-2013

Nothing too exciting to report but I did adjust the play in my spindle on my lathe. When I initially set the play, I shimmed the bearings to get approximately .001" play in both the front and rear bearing.

The other week, I noticed the work try to climb the tool, so I removed the chuck and checked. Close to .005" play in the front and .004" in the rear. I gave the bearing cap bolts a quick tighten and got the play back to the .001" mark.

I'm wondering if the bolts have loosened with use or the shims have compressed a little?

RE: Todays Project - What did you do today? - ml_woy - 01-13-2013

(01-12-2013, 09:00 PM)Mayhem Wrote: Nothing too exciting to report but I did adjust the play in my spindle on my lathe. When I initially set the play, I shimmed the bearings to get approximately .001" play in both the front and rear bearing.

The other week, I noticed the work try to climb the tool, so I removed the chuck and checked. Close to .005" play in the front and .004" in the rear. I gave the bearing cap bolts a quick tighten and got the play back to the .001" mark.

I'm wondering if the bolts have loosened with use or the shims have compressed a little?
Mayhem:
I to found and corrected a problem yesterday. Being new to machining, every day I try something new as I get braver. Yesterday I realigned my tail stock for the first time. Used a technique shown by Tublacane where he used a wooden disk, mounted in the chuck, to hold a dial indicator which he rotated 180 degrees around the tail shaft to find the amount of error. My tailshaft was out .020" and was quickly corrected. What a simple way to measure and correct the error. Just like setting the head on the milling machine accept in the horizontal position.

RE: Todays Project - What did you do today? - Highpower - 01-15-2013

Worked on putting a round peg in a square hole today. I bought a Z axis power feed for a Bridgeport mill during Enco's 20% / free shipping deal last month.

Step one: Install the extension shaft on the knee. Easy to do on a Bridgeport - just screw it on.
[Image: th_Knee_Extension_Shaft.jpg]
Too bad I don't have a Bridgeport.... Angel

The knee shaft on my "CCC" mill (as DaveH would say...) has a slightly smaller diameter and different thread size/pitch than the extension shaft to fit the Bridgeport. The extension just flops around on the mill's shaft and won't screw on. I'll have to improvise, adapt & overcome. Chin
[Image: th_Knee_shaft.jpg] [Image: th_Original_bore.jpg]

Re-cut the threads in the adapter from 3/4-16 to 20x1.75mm. Check.
[Image: th_20MM_threads.jpg]

Drug out a piece of 3/4" round stock (slightly on the long side) to make a 4" long sleeve and drill a 1/2" hole through it for boring bar access.
[Image: th_Overhang.jpg] [Image: th_Drill_half_inch.jpg]

Turned the OD of the round stock for a snug fit in the extension shaft and parted it off. Cleaned the parts and slid the sleeve into the extension with some Loctite 620 for good measure. I'll let that set up then bore the sleeve for a close fit to the shaft on the mill.
[Image: th_Sleeve_OD.jpg] [Image: th_Slip_fit.jpg]

RE: Todays Project - What did you do today? - EdK - 01-16-2013

Very nice Willie. I've never cut internal threads. That's something I should try some day, but after I master turning 4140. Smile

Ed