Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Swing-Nut Tubing Cutter: Swing the Blade Support Down and the Jaw Slides to the Tube, Up and the Screw Feeds It (Pritchard, 1941)
Frank L. Pritchard of Parker, Arizona, received US 2,231,593, dated 11 February 1941, for a tubing cutter small enough for a mechanic's tool box. The tube sits in a V in a fixed jaw. A movable jaw slides on the adjusting screw and a guide pin, with a spring pushing the jaws apart. The cutting wheel is held by a pivoted support with threads on its inner edge. Swung down, the support lets go of the screw, so the jaw can be pushed straight onto any tube. Swung up, it meshes with the screw again and the screw feeds the wheel in.
We make his parts from steel bar and plate. All sizes are ours.
Hagati
About 3 days
Amabwiriza
1
1
The swing that lets go
The swing that lets go
Gupakira ikaye ya Jupyter…
2
2
Read US 2,231,593
Read US 2,231,593
"The pivoted blade support 16 may swing downwardly until the threads thereof will be free of the threads of the screw 8. The movable jaw 6 may now be slid downwardly until the pivoted blade support is in its proper cutting position."
3
3
Print the template
Print the template
Both jaws, the blade support, the wheel and a 15 mm tube at 1:1, with the screw, pin and pivot holes. print at 100 % (check the 50 mm bar).
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4
Make the stationary jaw
Make the stationary jaw
Saw 64 mm of 16 mm square bar, or of 16 mm plate. File the 90 degree V 8 mm deep in its top face. Drill the 6 mm pin hole and a 10 mm hole for the screw, and counterbore the pin hole 10 mm across, 5 mm deep, for the spring. Drill the 3 mm cross-pin hole across the jaw so it just cuts into the side of the screw hole.
Ibikoresho by'iyi ntambwe:
Ikibaho cy'icyuma cyoroheje1 igiceIbikoresho bikenewe:
Umucumita w'Ibyuma
Amakariso Menshi
Icyuma Cyivumbura Gihagaze
Ifatiro ry'imashini
Ibyuma Byinshi byo Gucukura
Igicukuzi cyo Gushyira Ikimenyetso
Igikoresho Gishushanya Imirongo
Ifatiro ry'Ameza
Ikigereranyo cya Digitale cy'Amasentimetero 65
5
Make the movable jaw and the support
Make the movable jaw and the support
Saw the movable jaw 50 mm long from the same bar. Drill the 6.2 mm pin hole and its spring counterbore. Saw and file a slot 8.2 mm wide down its middle, from 22 mm to the end. Saw the blade support from 14 mm plate to the template. File its upper part down to 8 mm thick, centred, so it slides into the slot, and file away its lower inner corner. Saw a 7 mm slot up its lower part for the wheel. Drill the pivot and stop-pin holes through the jaw and support together, and file the stop-pin hole in the support into a short slot.
Ibikoresho by'iyi ntambwe:
Ikibaho cy'icyuma cyoroheje1 igiceIbikoresho bikenewe:
Umucumita w'IbyumaAmakariso Menshi
Ikusanyirizo ry'Amakariso MatoIcyuma Cyivumbura GihagazeIfatiro ry'imashiniIbyuma Byinshi byo GucukuraIfatiro ry'AmezaIkigereranyo cya Digitale cy'Amasentimetero 66
6
Tap the half nut
Tap the half nut
Pin the support in the jaw, swung up, and clamp it there. Drill 6.8 mm down the screw axis through both, so the drill cuts a shallow groove in the support's inner edge, then tap it M8 through both. Take the support out and open the jaw's own hole to 8.5 mm, so the screw passes freely and only the support's threads hold it.
Ibikoresho bikenewe:
Icyuma Cyivumbura GihagazeIfatiro ry'imashiniIbyuma Byinshi byo Gucukura
Agakoresho ko gukata imizingo y'ibyuma
Amavuta yo gukata7
7
Make the screw and the guide pin
Make the screw and the guide pin
Turn the top 62 mm of a 90 mm piece of 10 mm bar to 8 mm and cut an M8 thread on it with the die. Turn a groove 1.5 mm deep and 3.2 mm wide in the plain part, where the cross pin will sit, and drill a 6 mm hole across its bottom end for a T-bar. Cut the guide pin, 80 mm of 6 mm rod, and drill a 3 mm hole across its top for the stop pin.
Ibikoresho by'iyi ntambwe:
Umurongo uziguye w'icyuma cyoroheje1 igice
Umurongo Uzengurutse w'Icyuma Cyoroshye1 igiceIbikoresho bikenewe:
Imashini yo guhinguza icyuma
Igikoresho gifata cy'ibirenge 3 cy'imashini ihingura
Icyuma cyo kuca cy'itorero
Icyuma cyo guca ku ruzigaAgakoresho ko gukata imizingo y'ibyumaIcyuma Cyivumbura GihagazeIbyuma Byinshi byo GucukuraUmucumita w'IbyumaIkigereranyo cya Digitale cy'Amasentimetero 68
8
Turn the cutting wheel
Turn the cutting wheel
Chuck a tool steel bar and face it. Turn the end to 20 mm across for 10 mm, centre drill and drill a 5 mm hole 10 mm deep, and turn the edge to a 50 degree vee, 25 degrees each side, sharp in the middle of the 6 mm width. Part it off 6 mm long and take the burr off the hole.
Ibikoresho by'iyi ntambwe:
Inkoni y'icyuma cy'ibikoresho1 igiceIbikoresho bikenewe:
Imashini yo guhinguza icyumaIgikoresho gifata cy'ibirenge 3 cy'imashini ihinguraIcyuma cyo kuca cy'itoreroIcyuma cyo guca ku ruziga
Agatsiko k'ibitobora hagatiIbyuma Byinshi byo GucukuraIkigereranyo cya Digitale cy'Amasentimetero 6
Amadarubindi y'umutekano9
9
Harden and temper
Harden and temper
Heat the wheel to a cherry red, until a magnet no longer sticks, and quench it in water, moving it about. Rub it bright with a stone, warm it on a piece of steel plate over the fire, and quench again as soon as it turns a light straw colour.
Ibikoresho bikenewe:
Iziko ryo Gucura
Amakoro y'Umucuzi
Magineti nto
Indobo yo gukonjesha
Amazi
Ibuye ryo gutyaza
Uturindantoki two gukomeza ibyumaAmadarubindi y'umutekano10
10
Assemble
Assemble
Drive the guide pin into the stationary jaw. Put the screw into its hole from below and drive the cross pin in so it lies in the groove; the screw must still turn. Fit the T-bar. Slip the spring over the guide pin, then the movable jaw over the pin and the screw, and put the stop pin across the top. Fit the wheel in the support on its 5 mm pin, and pin the support into the jaw with its pivot and stop pins. Rivet a 1.5 mm steel strip along the top of the jaw, sticking out past the support as a thumb piece. Oil the threads.
Ibikoresho by'iyi ntambwe:
Umusumari w'icyuma5 ibice
Ikusanyirizo ry'Imizingo Ikandamizwa1 igice
Umurongo w'icyuma cya sipringi1 igice
Utuma tw'icyuma2 ibiceUmurongo Uzengurutse w'Icyuma Cyoroshye1 igiceIbikoresho bikenewe:
Inyundo ifite umutwe wa burutaIgicukuzi cyo Gushyira IkimenyetsoIfatiro ry'AmezaIcyuma Cyivumbura GihagazeIbyuma Byinshi byo GucukuraAmavuta yo gukata11
11
Cut a copper tube
Cut a copper tube
Mark a copper tube and hold it in a vice with soft jaws, or by hand for small tubes. Swing the support down, push the movable jaw down until the wheel touches the tube in the V, swing it up into the screw, and tighten the screw a little. Turn the cutter once round, give the screw about a quarter turn, and go on until the tube parts. The wheel should run in its own groove; the end should be square and not squeezed oval. Clean the inside of the end with a deburring tool.
Ibikoresho by'iyi ntambwe:
Umuyoboro w'umuringa1 igiceIbikoresho bikenewe:
Ifatiro ry'Ameza
Igikoresho cyo gukuraho ibisigazwa ku mperaIkigereranyo cya Digitale cy'Amasentimetero 612
12
Troubleshooting
Troubleshooting
Swing-nut tubing cutter troubleshooting.
Flow
Loading...
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13
History and honest limits
History and honest limits
**Frank L. Pritchard** of Parker, Arizona, US 2,231,593, dated 11 February 1941, filed 17 November 1939. He claimed "a pivoted blade support mounted on the movable jaw and having threads on the inner edge thereof adapted to engage the threads of said screw". His movable jaw had a bushing for the guide pin and a looped handle on the screw head; ours has a drilled hole and a T-bar. The patent gives no sizes or materials; all of ours are ours.
Ibikoresho
9- 1 igiceUmwanya
- Umwanya
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- 5 ibiceUmwanya
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- 2 ibiceUmwanya
- 1 igiceUmwanya
Ibikoresho bikenewe
27- Umwanya
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Dosiye z'igishushanyo
1Iki gishushanyo gikora
Blueprint zijyanye
Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame
V-Slide Tubing Cutter: Two Slide Halves Held on the Ways by One Spring Clip, a Reamer on the Frame (Thewes, 1938)
na Forge
Ubucuzi bw'Ibyuma
0
0
0
0
0
0
Taps and Dies Cut on the Lathe, with Wrench and Stock
na Martin
Ubucuzi bw'Ibyuma
25
0
0
0
6
0
Reamer: a Fluted Hand Reamer Turned, Fluted, Hardened and Stoned (Markham, 1908)
na Forge
Ubucuzi bw'Ibyuma
7
0
0
0
0
0
CC0 Umurenge rusange
Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.
Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.