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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)
Ward H. Zeiler · Public domain
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13. uLwezi 2026NO
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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)

Ward H. Zeiler of Holyoke, Colorado, received US 2,821,781, dated 4 February 1958, for a plumber's tubing cutter that cuts a tube square, to length, near its end. The frame is one springy rod bent into a U. The lower leg goes into the tube and carries a roller. The upper leg carries a cutting disk outside the tube. A handle slides along both legs. Its front end stops against the tube end, so the cut length is read off a scale on the lower leg. A screw in the handle bends the upper leg in and presses the disk onto the tube, and turning the tool cuts it off. All sizes are ours.
Ophakathi
About 2 days

Imiyalelo

1

Why the frame must spring

Ilayisha incwadi ye-Jupyter…
2

Read US 2,821,781

"The leg 7 is then inserted in the tube 22 and the roller 14 and the projection 24 are engaged in the upper portion of said tube. The screw 21 is then tightened for bending the leg 6 of the frame 4, thus engaging the knife 10 with the periphery of the tube 22."
3

Print the template

The bent frame, its ends, the disk, roller and handle at 1:1, with the oval bore, the screws and the scale. print at 100 % (check the 50 mm bar).
Ifayela LomklamoPDFCC0 - Free
Landa imodeli
4

Bend the frame

Cut 470 mm of 6 mm spring steel wire. Heat the middle 40 mm red with the torch and bend it round a 10 mm bar into a U with the legs 16 mm apart, and straighten the legs parallel. Heat the last 25 mm of each leg red and let it cool slowly in the dying forge, so the ends are soft enough to file and thread. Leave the rest of the legs as they are: they must spring.

Izinto zokwakha zalesi sinyathelo:

Ucingo lwensimbi ye-springUcingo lwensimbi ye-spring1 ucezu

Amathuluzi adingekayo:

Isibani se-brazingIsibani se-brazing
Iziko LokukhandaIziko Lokukhanda
Udlawu LomkhandiUdlawu Lomkhandi
Isibambo SebhentshiIsibambo Sebhentshi
Isando esinekhanda eliyindilingaIsando esinekhanda eliyindilinga
Isaha SensimbiIsaha Sensimbi
Amagilavu okushiselaAmagilavu okushisela
Izibuko zokuphephaIzibuko zokuphepha
5

Thread the leg ends

Turn or file the last 24 mm of each leg to 5 mm, leaving a square shoulder, and cut an M5 thread on the last 8 mm with the die.

Amathuluzi adingekayo:

Umshini Wokuphendula InsimbiUmshini Wokuphendula Insimbi
Isibambi somshini wokuphenda esinemilomo emithathuIsibambi somshini wokuphenda esinemilomo emithathu
Ithuluzi lokusika le-latheIthuluzi lokusika le-lathe
Iqoqo LamafayelaIqoqo Lamafayela
Isethi yokusika izikulufuIsethi yokusika izikulufu
I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6
Uwoyela wokusikaUwoyela wokusika
6

Turn the disk and the roller

Disk: chuck a tool steel bar, turn 12 mm of it to 18 mm, drill it 5 mm, and turn the front 6 mm to a 50 degree edge, sharp in its middle. Turn the next 4 mm down to a 10 mm hub and part it off. Roller: turn 10 mm mild steel bar 16 mm long and drill it 5.2 mm, so it spins freely on the leg.

Izinto zokwakha zalesi sinyathelo:

Induku yensimbi yamathulusiInduku yensimbi yamathulusi1 ucezu
Induku eyindilinga yensimbi ethambileInduku eyindilinga yensimbi 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
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
7

Harden and temper

Heat the disk 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
8

Make the handle

Saw 90 mm of 32 mm aluminium bar and face the ends. Drill two 6.2 mm holes through it lengthways, 16 mm apart, each 8 mm off the centre. With a round file, open the front 70 mm of the upper hole towards the lower one, 1.8 mm at the front face, tapering to nothing. Drill and tap M6 into the upper hole from the top, 12 mm from the front, and into the lower hole from below, 14 mm from the front. Saw and file away the lower half of the front 8 mm, leaving a 10 mm round boss round the lower hole. File three finger grooves underneath.

Izinto zokwakha zalesi sinyathelo:

Ubhande lwe-aluminium oluyindilingaUbhande lwe-aluminium oluyindilinga1 ucezu

Amathuluzi adingekayo:

Isaha SensimbiIsaha Sensimbi
Umshini Wokuphendula InsimbiUmshini Wokuphendula Insimbi
Isibambi somshini wokuphenda esinemilomo emithathuIsibambi somshini wokuphenda esinemilomo emithathu
Ibhola ElimileIbhola Elimile
Isibambo SomshiniIsibambo Somshini
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Isethi yokusika izikulufuIsethi yokusika izikulufu
Iqoqo LamafayelaIqoqo Lamafayela
Isethi Yamafayela AmancaneIsethi Yamafayela Amancane
I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6
9

Make the guard

Cut a strip of brass sheet 12 mm wide and 50 mm long, bend it into a half round hood that reaches 12 mm past the handle's front over the disk, and fix its back end on top of the handle with two small screws.

Izinto zokwakha zalesi sinyathelo:

Ishidi Lethusi EliphuziIshidi Lethusi Eliphuzi1 ucezu
Isikulufu Sekhanda LesokhethiIsikulufu Sekhanda Lesokhethi2 izicucu

Amathuluzi adingekayo:

Isaha SensimbiIsaha Sensimbi
Iqoqo LamafayelaIqoqo Lamafayela
Ibhola ElimileIbhola Elimile
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Isethi yokusika izikulufuIsethi yokusika izikulufu
Isibambo SebhentshiIsibambo Sebhentshi
10

Assemble

Slide the handle onto the legs from the open end, the upper leg in the oval bore. Put the disk on the upper leg's end, hub outwards, then a washer and an M5 nut, snug enough that the disk still turns. Fit the roller the same way on the lower leg. Screw in the M6 feed screw on top and the setscrew below.

Izinto zokwakha zalesi sinyathelo:

Iwasha EliyisicabaIwasha Eliyisicaba2 izicucu
Inathi Yezinhlangothi EziyisithuphaInathi Yezinhlangothi Eziyisithupha2 izicucu
Isikulufu Sekhanda LesokhethiIsikulufu Sekhanda Lesokhethi1 ucezu
Isikulufu sokubopha esinomphetho onjengenkomishiIsikulufu sokubopha esinomphetho onjengenkomishi1 ucezu

Amathuluzi adingekayo:

Isipanela esilungisekayoIsipanela esilungisekayo
Isethi yezikhiye ze-hexIsethi yezikhiye ze-hex
11

Mark the scale

Slide the handle so its recess face is 20 mm from the disk's edge and lock it. File a nick across the lower leg at the handle's back face and mark it 20. File a nick every 10 mm towards the bend, deeper every 50 mm. The handle's back face now reads the cut length.

Amathuluzi adingekayo:

Isethi Yamafayela AmancaneIsethi Yamafayela Amancane
I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6
12

Cut a tube to length

Set the handle to the length you want and lock the setscrew. Push the lower leg into the tube until the end bears in the recess, with the roller and boss against the inside. Tighten the feed screw until the disk touches. Turn the tool round the tube, giving the screw a little more each turn, until the end drops off. Clean the cut with a deburring tool.

Izinto zokwakha zalesi sinyathelo:

Ishubhu lethusiIshubhu lethusi1 ucezu

Amathuluzi adingekayo:

Isibambo SebhentshiIsibambo Sebhentshi
Ithuluzi lokususa amabhadiIthuluzi lokususa amabhadi
Isethi yezikhiye ze-hexIsethi yezikhiye ze-hex
I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6
13

Troubleshooting

Sprung-leg tubing cutter troubleshooting.

Flow

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14

History and honest limits

**Ward H. Zeiler** of Holyoke, Colorado, US 2,821,781, dated 4 February 1958, filed 23 November 1956. He claimed "a substantially U-shaped resilient frame including legs extending slidably through the bores" and "a feed screw ... for bending said one leg within the confines of the handle for engaging the cutting disk with the tube". His frame was "suitable resilient metal"; ours is spring steel wire. His handle was a metal sleeve with a guard formed on it; ours is aluminium bar with a brass guard. The patent gives no sizes; all of ours are ours.

Izinto

10

Amathuluzi Adingekayo

28

Amafayela omklamo

1

Le blueprint yenza

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Ama-blueprint ahlobene

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

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