Ukusebenzisana
UBUCIKO
UBUHLE NEMPILO
UBUCIKO BEZANDLA
AMASIKO NOMLANDO
EZOKUZIJABULISA
IMVELO
UKUDLA NEZIPHUZO
REVERSE ENGINEERING
IZAYENSI
EZEMIDLALO
UBUCHWEPHESHE
IZINTO EZIGQOKWAYO
Cam-Arm Tubing Cutter: Two Swinging Arms Keep the Wheel and Rollers Evenly Round Any Tube (Lutsker, 1959)
Simon Lutsker · Public domain
Forge

Yenziwe ngu-

Forge

13. uLwezi 2026NO
0
0
0
0
0

Cam-Arm Tubing Cutter: Two Swinging Arms Keep the Wheel and Rollers Evenly Round Any Tube (Lutsker, 1959)

Simon Lutsker of Shaker Heights, Ohio, received US 2,870,536, dated 27 January 1959, for a tubing cutter that grips small and large tubes equally well. The wheel turns under a housing at the foot of a guide. A block slides up the guide on a screw. Two arms hang from the block, each with a roller at its lower end. Springs press the arms' curved cam edges against rollers on the housing. As the screw draws the block up, the arms swing inwards or outwards, so the wheel and the two rollers stay about evenly spaced round the tube, whatever its size. We worked out the cam so the three contacts are exactly 120 degrees apart. The curve comes out as an arc, as in his patent. All sizes are ours.
Osezingeni eliphezulu
About 4 days

Imiyalelo

1

Three points evenly round

Ilayisha incwadi ye-Jupyter…
2

Read US 2,870,536

"Irrespective of the size of the tubing which is being cut, the points of engagement of the cutter wheel 21 and support rollers 32 with the tubing will always be substantially equidistant from each other circumferentially of the tubing."
3

Print the template

The arm plate with its cam edge, the housing and the guide block at 1:1, with holes, slots and sizes. print at 100 % (check the 50 mm bar).
Ifayela LomklamoPDFCC0 - Free
Landa imodeli
4

Cut the arm plates

Glue four copies of the arm outline on 3 mm steel plate. Saw and file them to the line, taking the cam edge slowly and checking it against the template. Clamp them in a stack and drill the 4 mm pivot and roller-pin holes and the two 3 mm holes through all four together.

Izinto zokwakha zalesi sinyathelo:

Ishidi lensimbi ethambileIshidi lensimbi ethambile1 ucezu

Amathuluzi adingekayo:

Isaha SensimbiIsaha Sensimbi
Iqoqo LamafayelaIqoqo Lamafayela
Isethi Yamafayela AmancaneIsethi Yamafayela Amancane
Ibhola ElimileIbhola Elimile
Isibambo SomshiniIsibambo Somshini
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Isibhoboza SesikhungoIsibhoboza Sesikhungo
Isibambo SebhentshiIsibambo Sebhentshi
I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6
5

Make the housing

From 30 x 20 flat bar, saw a block 64 mm long and file it to 28 x 18 mm, leaving the two ears below its middle. Saw the forked ends: two cuts 14.4 mm apart, 20 mm in from each end, and break out the middle. Saw and file a 7 mm slot up between the ears for the wheel. Drill the 5 mm shaft hole across the ears, the 4 mm housing-roller pins across the forks, and the 4 mm rivet hole. File a groove 20 mm wide and 3 mm deep down each face for the guide's legs.

Izinto zokwakha zalesi sinyathelo:

Ibha Eyisicaba Yensimbi EthambileIbha Eyisicaba Yensimbi Ethambile1 ucezu

Amathuluzi adingekayo:

Isaha SensimbiIsaha Sensimbi
Iqoqo LamafayelaIqoqo Lamafayela
Ibhola ElimileIbhola Elimile
Isibambo SomshiniIsibambo Somshini
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Isibambo SebhentshiIsibambo Sebhentshi
I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6
Insimbi Yokudweba ImigqaInsimbi Yokudweba Imigqa
6

Make the block and the guide

Saw the guide block from the same bar, 60 x 18 x 28 mm, with forked ends from 14 mm out, the 4 mm pivot holes, the 3 mm spring-pin holes and the leg grooves. Drill 8.5 mm up its middle and tap M10. Bend a 20 x 3 mm flat bar into an inverted U with its legs 22 mm apart inside and 69 mm high, and drill a 10.5 mm hole in its top.

Izinto zokwakha zalesi sinyathelo:

Ibha Eyisicaba Yensimbi EthambileIbha Eyisicaba Yensimbi Ethambile2 izicucu

Amathuluzi adingekayo:

Isaha SensimbiIsaha Sensimbi
Iqoqo LamafayelaIqoqo Lamafayela
Ibhola ElimileIbhola Elimile
Isibambo SomshiniIsibambo Somshini
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Isethi yokusika izikulufuIsethi yokusika izikulufu
Isibambo SebhentshiIsibambo Sebhentshi
Isando esinekhanda eliyindilingaIsando esinekhanda eliyindilinga
I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6
7

Turn the rollers and the wheel shaft

Turn two housing rollers 10 mm across and 14 mm long, and two lower rollers 12 mm across and 7.6 mm long, from mild steel bar, all bored 4.2 mm. For the wheel shaft, turn a 6 mm rod to 5 mm, leaving a 6 mm head, file a flat on the head, and turn a groove near the other end.

Izinto zokwakha zalesi sinyathelo:

Induku eyindilinga yensimbi ethambileInduku eyindilinga yensimbi ethambile1 ucezu
Ubhamu Oluyindilinga Lwensimbi EthambileUbhamu Oluyindilinga Lwensimbi Ethambile1 ucezu

Amathuluzi adingekayo:

Umshini Wokuphendula InsimbiUmshini Wokuphendula Insimbi
Isibambi somshini wokuphenda esinemilomo emithathuIsibambi somshini wokuphenda esinemilomo emithathu
Ithuluzi lokusika le-latheIthuluzi lokusika le-lathe
Insimbi yokuhlukanisa emshinini wokuphothaInsimbi yokuhlukanisa emshinini wokuphotha
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Iqoqo LamafayelaIqoqo Lamafayela
I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6
8

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.

Izinto zokwakha zalesi sinyathelo:

Induku yensimbi yamathulusiInduku yensimbi yamathulusi1 ucezu

Amathuluzi adingekayo:

Umshini Wokuphendula InsimbiUmshini Wokuphendula Insimbi
Isibambi somshini wokuphenda esinemilomo emithathuIsibambi somshini wokuphenda esinemilomo emithathu
Ithuluzi lokusika le-latheIthuluzi lokusika le-lathe
Insimbi yokuhlukanisa emshinini wokuphothaInsimbi yokuhlukanisa emshinini wokuphotha
Isethi yamabhitha okuqala imboboIsethi yamabhitha okuqala imbobo
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6
Izibuko zokuphephaIzibuko zokuphepha
9

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.

Amathuluzi adingekayo:

Iziko LokukhandaIziko Lokukhanda
Udlawu LomkhandiUdlawu Lomkhandi
Uzibuthe OmncaneUzibuthe Omncane
Ibhakede lokupholisaIbhakede lokupholisa
AmanziAmanzi
Itshe LokulolaItshe Lokulola
Amagilavu okushiselaAmagilavu okushisela
Izibuko zokuphephaIzibuko zokuphepha
10

Make the springs

From spring steel strip, cut two strips 8 mm wide and 30 mm long for the arm springs, and one 6 mm wide and 25 mm long to hold the wheel shaft. Bend each arm spring so it presses on its arm's spring pin and pushes the arm outwards. Drill a hole in the end of each for its pin or screw.

Izinto zokwakha zalesi sinyathelo:

Umucu wensimbi yensiphoUmucu wensimbi yensipho1 ucezu

Amathuluzi adingekayo:

Isaha SensimbiIsaha Sensimbi
Iqoqo LamafayelaIqoqo Lamafayela
Ibhola ElimileIbhola Elimile
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Isibambo SebhentshiIsibambo Sebhentshi
11

Make the screw

Cut 90 mm of M10 threaded rod. Lock two nuts together 25 mm from its top as the flange. Put it up through the guide's top hole, add two washers as the spacer, then a nut locked with a second one. Drill a 6 mm hole across the top end and fit a 70 mm piece of 6 mm rod as the T-handle.

Izinto zokwakha zalesi sinyathelo:

Insika enemicu yesikulufuInsika enemicu yesikulufu1 ucezu
Inathi Yezinhlangothi EziyisithuphaInathi Yezinhlangothi Eziyisithupha4 izicucu
Iwasha EliyisicabaIwasha Eliyisicaba2 izicucu
Ubhamu Oluyindilinga Lwensimbi EthambileUbhamu Oluyindilinga Lwensimbi Ethambile1 ucezu

Amathuluzi adingekayo:

Isipanela esilungisekayoIsipanela esilungisekayo
Ibhola ElimileIbhola Elimile
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Isaha SensimbiIsaha Sensimbi
Isando esinekhanda eliyindilingaIsando esinekhanda eliyindilinga
12

Assemble

Pin each arm pair together with its lower roller between the plates, and with short tubes as spacers on the pivot and spacer pins. Pin the arms into the block's forked ends. Fit the housing rollers in the housing's forks and the wheel on its shaft, with the flat spring screwed to the housing and sitting in the shaft's groove. Screw the block onto the screw, feed the arms down through the housing's forks inside its rollers, and rivet the guide's legs into the housing's grooves. Pin the arm springs to the block. Oil every pin and the screw.

Izinto zokwakha zalesi sinyathelo:

Isipikili sensimbi sokuqondisaIsipikili sensimbi sokuqondisa8 izicucu
Izipikili zensimbiIzipikili zensimbi1 ucezu
Isikulufu Sekhanda LesokhethiIsikulufu Sekhanda Lesokhethi1 ucezu

Amathuluzi adingekayo:

Isando esinekhanda eliyindilingaIsando esinekhanda eliyindilinga
Isibhoboza SesikhungoIsibhoboza Sesikhungo
Isibambo SebhentshiIsibambo Sebhentshi
Isethi yezikhiye ze-hexIsethi yezikhiye ze-hex
Uwoyela wokusikaUwoyela wokusika
13

Cut a copper tube

Mark a copper tube and hold it in a vice with soft jaws, or by hand for small tubes. Turn the handle to open the arms, put the cutter over the tube, and turn it back until the rollers lift the tube against the wheel. Check by eye that the wheel and rollers look evenly spaced. 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.

Izinto zokwakha zalesi sinyathelo:

Ishubhu lethusiIshubhu lethusi1 ucezu

Amathuluzi adingekayo:

Isibambo SebhentshiIsibambo Sebhentshi
Ithuluzi lokususa amabhadiIthuluzi lokususa amabhadi
I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6
14

Troubleshooting

Cam-arm tubing cutter troubleshooting.

Flow

Loading...
15

History and honest limits

**Simon Lutsker** of Shaker Heights, Ohio, US 2,870,536, dated 27 January 1959, filed 26 August 1957. He claimed "a guide block mounted for movement along said guide member and movable by said screw means, a pair of cammable members pivotally secured to said guide block" and the springs pressing their "arcuate cam surfaces" against the housing rollers. He said the contacts stay "substantially" equidistant; ours are set exactly 120 degrees apart. The patent gives no sizes or cam radius; all of ours are ours.

Izinto

13

Amathuluzi Adingekayo

29

Amafayela omklamo

1

Le blueprint yenza

Thumbnail
Isibambeli

Isisiki sepayipi

Free

310
0
1

Ama-blueprint ahlobene

Lama-blueprint abelana ngolwazi — amasu, izinto noma izimiso

V-Slide Tubing Cutter: Two Slide Halves Held on the Ways by One Spring Clip, a Reamer on the Frame (Thewes, 1938)

V-Slide Tubing Cutter: Two Slide Halves Held on the Ways by One Spring Clip, a Reamer on the Frame (Thewes, 1938)

ngu-ForgeNO

Umsebenzi Wensimbi

0
0
0
0
0
0
Slip-Knob Tube Cutter: the Feed Knob Turns the Screw Through Spring-Loaded Plates and Slips Before the Tube Is Crushed (Parker, 1944)

Slip-Knob Tube Cutter: the Feed Knob Turns the Screw Through Spring-Loaded Plates and Slips Before the Tube Is Crushed (Parker, 1944)

ngu-ForgeNO

Umsebenzi Wensimbi

0
0
0
0
0
0
Sprung-Leg Tubing Cutter: a Bent Rod With a Disk Outside and a Roller Inside, the Handle's Screw Bends One Leg In (Zeiler, 1958)

Sprung-Leg Tubing Cutter: a Bent Rod With a Disk Outside and a Roller Inside, the Handle's Screw Bends One Leg In (Zeiler, 1958)

ngu-ForgeNO

Umsebenzi Wensimbi

0
0
0
0
0
0

CC0 Isizinda Somphakathi

Le blueprint ikhishwe ngaphansi kwe-CC0. Ukhululekile ukukopisha, ukuguqula, ukusabalalisa, nokusebenzisa ngaphandle kwemvume.

Sekela uMenzi ngokuthenga imikhiqizo nge-Blueprint yabo IKhomishane Yomenzi kumiswe ngabathengisi, noma dala inguqulo entsha yale Blueprint bese uyifaka njengoxhumaniso ku-Blueprint yakho ukuze wabelane ngemali engenayo.

Ingxoxo

(0)

Ngena ukuze ujoyine ingxoxo

Kulayishwa amazwana...