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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. Novemba 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.
Kati
About 2 days

Maagizo

1

Why the frame must spring

Inapakia daftari la 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).
Faili ya UsanifuPDFCC0 - Free
Pakua modeli
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.

Vifaa kwa hatua hii:

Waya wa chuma cha kamaniWaya wa chuma cha kamani1 kipande

Zana zinazohitajika:

Kichomeo cha kulehemu kwa shabaKichomeo cha kulehemu kwa shaba
Jiko la KufuaJiko la Kufua
Koleo la forjiKoleo la forji
Kibano cha meza ya kaziKibano cha meza ya kazi
Nyundo yenye kichwa cha duaraNyundo yenye kichwa cha duara
Msumeno wa chumaMsumeno wa chuma
Glavu za kulehemuGlavu za kulehemu
Miwani ya usalamaMiwani ya usalama
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.

Zana zinazohitajika:

Kereza ya ChumaKereza ya Chuma
Chaki ya kereza yenye makucha 3Chaki ya kereza yenye makucha 3
Chombo cha kukata cha latheChombo cha kukata cha lathe
Seti ya tupaSeti ya tupa
Seti ya kukata nyuzi za skrubuSeti ya kukata nyuzi za skrubu
Kipima-unene cha dijitali cha inchi 6Kipima-unene cha dijitali cha inchi 6
Mafuta ya kukatiaMafuta ya kukatia
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.

Vifaa kwa hatua hii:

Fito ya chuma cha zanaFito ya chuma cha zana1 kipande
Ufito mviringo wa chuma lainiUfito mviringo wa chuma laini1 kipande

Zana zinazohitajika:

Kereza ya ChumaKereza ya Chuma
Chaki ya kereza yenye makucha 3Chaki ya kereza yenye makucha 3
Chombo cha kukata cha latheChombo cha kukata cha lathe
Patasi ya kukata kaziPatasi ya kukata kazi
Seti ya bit za kuanzia shimoSeti ya bit za kuanzia shimo
Seti ya vichimbuziSeti ya vichimbuzi
Kipima-unene cha dijitali cha inchi 6Kipima-unene cha dijitali cha inchi 6
Miwani ya usalamaMiwani ya usalama
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.

Zana zinazohitajika:

Jiko la KufuaJiko la Kufua
Koleo la forjiKoleo la forji
Sumaku NdogoSumaku Ndogo
Ndoo ya kupoza chumaNdoo ya kupoza chuma
MajiMaji
Jiwe la KunoleaJiwe la Kunolea
Glavu za kulehemuGlavu za kulehemu
Miwani ya usalamaMiwani ya usalama
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.

Vifaa kwa hatua hii:

Fimbo ya mviringo ya aluminiFimbo ya mviringo ya alumini1 kipande

Zana zinazohitajika:

Msumeno wa chumaMsumeno wa chuma
Kereza ya ChumaKereza ya Chuma
Chaki ya kereza yenye makucha 3Chaki ya kereza yenye makucha 3
Kekee cha NguzoKekee cha Nguzo
Kibano cha mashineKibano cha mashine
Seti ya vichimbuziSeti ya vichimbuzi
Seti ya kukata nyuzi za skrubuSeti ya kukata nyuzi za skrubu
Seti ya tupaSeti ya tupa
Seti ya tupa ndogoSeti ya tupa ndogo
Kipima-unene cha dijitali cha inchi 6Kipima-unene cha dijitali cha inchi 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.

Vifaa kwa hatua hii:

Bamba la Shaba ya NjanoBamba la Shaba ya Njano1 kipande
Skrubu Yenye Kichwa cha SoketiSkrubu Yenye Kichwa cha Soketi2 vipande

Zana zinazohitajika:

Msumeno wa chumaMsumeno wa chuma
Seti ya tupaSeti ya tupa
Kekee cha NguzoKekee cha Nguzo
Seti ya vichimbuziSeti ya vichimbuzi
Seti ya kukata nyuzi za skrubuSeti ya kukata nyuzi za skrubu
Kibano cha meza ya kaziKibano cha meza ya kazi
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.

Vifaa kwa hatua hii:

Washa bapaWasha bapa2 vipande
Nati ya pembe sitaNati ya pembe sita2 vipande
Skrubu Yenye Kichwa cha SoketiSkrubu Yenye Kichwa cha Soketi1 kipande
Skrubu ya kubana yenye ncha ya kikombeSkrubu ya kubana yenye ncha ya kikombe1 kipande

Zana zinazohitajika:

Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
Seti ya funguo za pembe sitaSeti ya funguo za pembe sita
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.

Zana zinazohitajika:

Seti ya tupa ndogoSeti ya tupa ndogo
Kipima-unene cha dijitali cha inchi 6Kipima-unene cha dijitali cha inchi 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.

Vifaa kwa hatua hii:

Mrija wa shaba-njekunduMrija wa shaba-njekundu1 kipande

Zana zinazohitajika:

Kibano cha meza ya kaziKibano cha meza ya kazi
Kifaa cha kuondoa ukingoKifaa cha kuondoa ukingo
Seti ya funguo za pembe sitaSeti ya funguo za pembe sita
Kipima-unene cha dijitali cha inchi 6Kipima-unene cha dijitali cha inchi 6
13

Troubleshooting

Sprung-leg tubing cutter troubleshooting.

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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.

Vifaa

10

Zana Zinazohitajika

28

Faili za muundo

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Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

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)

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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)

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Taps and Dies Cut on the Lathe, with Wrench and Stock

Taps and Dies Cut on the Lathe, with Wrench and Stock

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