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How to center ext. thread to int. thread?
Alrighty, one question from the bottom drawer: how can I remove all play from a pair of threads so that the axes of external and internal thread coincide? I have one-inch dia. threads, pitch is 1/32". Lengths around ¼ in. Transverse loads go up to a pound or so. Between the largest internal... -
O. T., couple bad habits I can’t stand with people cooking, from potager to chef
Gordon Ramsay, René Schudel, Ina Gartner, and many more, praised and admired, of course also hated – for instance by me for what they do. What do they all do that makes me cringe time and again? Well, they pound cutlery on the rims of pots. They go into earthenware with metal forks, metal... -
Boss has acquired TopSolid and installed it but doesn’t make use of simulation
Girls, I’m having a hard time here with my chef who is 54 years old, so four years younger than me. I have learnt to use Esprit (for turning) and visited a training course on Mastercam X8 a few years ago. Noted that in my resume. Hired since March 9th I’m only told I could perhaps start to use...- Mechanola
- Thread
- Replies: 2
- Forum: Shop Management and Owner Issues
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Anyone experienced in the maintenance of Merrow A class sewing machines?
Hi, all Having a soft spot with sewing machines I’m doing some research on barrel cam mechanisms and in doing so I have discovered the Merrow. According to the company’s website text an A class of machines was introduced in 1932. Those have a pair of geared cylindrical parts that are grooved...- Mechanola
- Thread
- Replies: 3
- Forum: Antique Machinery and History
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Trade language, correct designations, do you care?
Holes and slits were forbidden with one of my teachers. I thought his is right. We are mechanics, machinists, manufacturers, makers of—well, bores and grooves and pockets and more. My native language is German. I know a couple expressions in French which helps a lot with reading interesting...- Mechanola
- Thread
- Replies: 55
- Forum: Shop Management and Owner Issues
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Would you pay $760 for a new lapping plate?
Friends, I have more and more onesies to do with critical parts of movie cameras. Aperture plates, the part of the film gate behind which the film gets exposed, intermediate parts, lens mounts, ground glasses, ground focusing prisms. Be it that a prism surface become finer or the contrary, be it...- Mechanola
- Thread
- Replies: 18
- Forum: Manufacturing in America and Europe
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What Imperial Thread Size Could That Be?
Hello, everybody Mate and I arrived at the Siemens & Halske Telefongewinde (telephone thread) #31 of MD 2,160 mm, 51 tpi, and 68 degrees angle. The outer end of this set screw is botched, obviously. Looking at some tables now I see that there is #2 - 56 0.086" UNC size which would be 2,1844...- Mechanola
- Thread
- Replies: 14
- Forum: Antique Machinery and History
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Project for a Double End Lathe
Friends, I am planning something surprising, shocking, stupid maybe. It’s about a conventional machine tool, namely a double end lathe. Such an apparatus has a number of possibilities over the well-known asymmetrical lathe. I have a mate who has a shop and needs work. Now, I am more the thinker...- Mechanola
- Thread
- Replies: 16
- Forum: Shop Management and Owner Issues
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The Man Who Turns Stones on a Lathe
A grinding stone maker. He makes handy pieces and wheels from a sand stone found in a particular area in Austria, the Traunviertel. Farmers say that no other stone would sharpen a knife or a scythe blade as well as this one stone. Was frightened to see him turn that sandy material on a lathe at...- Mechanola
- Thread
- Replies: 4
- Forum: Antique Machinery and History
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Who else gets her or his metal from the scrap heap?
Everytime I pass by the metals dealer I ask the worker if he had cut-offs. Sometimes I have a look in their skip and point to a 5-inch dia slug or a 4 by 4 inch square bar length. Almost always he allows me to take some and so I have gathered dozens of kilos, maybe hundreds, of hot rolled and... -
FS Colchester Master 2500 6½" × 40" with accessories
I am most honest: this lathe was cast in Taiwan in 1973 and finished in England. Sold and used ever since in this country. It fell over once forward. No damage to headstock, spindle, and gearbox occurred. Leadscrew and feedshaft redressed. I have levelled the bed to within 0,04 mm (1.5 mil)...- Mechanola
- Thread
- Replies: 1
- Forum: Machinery for Sale or Wanted
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Unpunctuality on company side, how would you react?
Got back home yesterday from an interview, upset to say the least. On September 8 the HR boss sent me an E-Mail with the invitation. Gladly accepted by reply mail. Date: September 24, 11.00 AM. The drive lastet 95 minutes, I called at 10.59. The receptionist announced my being here by phone and...- Mechanola
- Thread
- Replies: 82
- Forum: Shop Management and Owner Issues
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Looking for friendly help in Chicago: Bell & Howell Co. history research
Hello, Cook County and Skokie fellas Is there anybody around eventually interested in doing some research on the coming of Bell & Howell Co. and its products? I have knowledge of the interiors of the Standard Cinematograph Camera, Model 2709, as it was named at the time, and there seem to be a...- Mechanola
- Thread
- Replies: 7
- Forum: Antique Machinery and History
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Less common insert types, what do you use?
Turners, I’d like to know whether anyone of you is familiar with more than only C type inserts and what experiences you’ve made with, say, L type or A type ones. As a specialty, did you ever employ a P insert for turning nickel steel, for example? Kappa, κ, is the front edge angle and epsilon...- Mechanola
- Thread
- Replies: 3
- Forum: CNC Machining
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Required measures or round figures?
Colleagues, I have a terrible question. A bore should have, say, ¾" diameter. Tolerance shall be ± 0.001". Now comes the designer and notes 19 mm plus 0,075 minus 0,025 mm. He seems to not like 19,05 mm ± 0,025 mm. Why is it that asymmetric tolerances are given instead of values that I should... -
Workholding Tailstock
Fellas, has anyone knowledge of a tailstock that is or can be equipped with prisms to clamp on round stock? I’m wondering if I’m alone with the idea that I could put a heavy workpiece on some kind of support on the bed so that I could for example make a center into a 67 lb. piece (30 kg). I... -
WTB: Arbor Type Helical Mill
Hey, everybody! Am looking for a 5 mm arbor milling cutter, anyone knowledgeable?- Mechanola
- Thread
- Replies: 2
- Forum: Tooling, Parts and Accessories For Sale or Wanted
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Help! Would anybody please do me a favor and measure something?
Great America, I am desperate. Wanted to buy a collet holder for ER 40, Morse taper #5, drawbar thread inside, to use in the spindle of my Colchester Master 2500. Rego-Fix delivered one, it is too small and too short. Biggest diameter I measure on the taper is 44,61 mm. Packed the thing up and... -
How much do you pay for a 3/8" or 10 mm spot drill?
I’m getting angry. One big dealer asks 10.90, net, for an HSS 10 mm 90 degrees spot drill. The company is 80 km away. The other smaller dealer is here on the border of town, they want 24.00 but offer it for 14.00 from 100 purchase sum on. So I can decide between the cheaper which adds 8 percent...