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Metal Band Saw: Horizontal Saw on a Welded Steel Frame
Curtis J. Eccardt (Emerson Electric Co.) · Public domain (expired patent)
Martin

Imeundwa na

Martin

23. Oktoba 2026NO
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Metal Band Saw: Horizontal Saw on a Welded Steel Frame

Curtis Eccardt's horizontal power band saw (Emerson Electric, US 4,364,294, 1982), built from welded steel channel and tube instead of iron castings to cut its cost. The saw head swings down on trunnions over the bed; a hydraulic cylinder with a valve sets how fast it feeds, a spring counterbalances it, and a spring tensioner shows the blade tension on a scale. Two guides with rollers twist the blade's lower run 90° so its teeth face down into the work, and carbide inserts hold it there. The patent gives no sizes, speeds or ratings; the welder and wrenches are ours. The picture: the patent's Fig. 1.
Juu
4 days

Maagizo

1

Weld the bed

Stand two steel channels (9a, 9b) parallel, webs upright and flanges facing in, and weld gussets (15) between their webs. Bolt a bed plate (17) across the top flanges as the work surface. Ours: MIG welder, drill press for the bolt holes.

Vifaa kwa hatua hii:

Chuma cha umbo la UChuma cha umbo la U2 vipande
Bamba la chuma lainiBamba la chuma laini1 kipande
Bolti ya kichwa cha pembe sita - daraja 8.8Bolti ya kichwa cha pembe sita - daraja 8.81 kipande

Zana zinazohitajika:

Mashine ya Kulehemu ya MIGMashine ya Kulehemu ya MIG
Kekee cha NguzoKekee cha Nguzo
Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
2

Weld and bolt on the legs

Weld formed sheet-steel legs onto horizontal floor members to make front and rear leg weldments (19, 21), and bolt them under the bed.

Vifaa kwa hatua hii:

Bati la chumaBati la chuma1 kipande
Mirija ya chumaMirija ya chuma1 kipande
Bolti ya kichwa cha pembe sita - daraja 8.8Bolti ya kichwa cha pembe sita - daraja 8.81 kipande

Zana zinazohitajika:

Mashine ya Kulehemu ya MIGMashine ya Kulehemu ya MIG
Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
3

Weld the head

Weld a head post (25) of square or rectangular steel tube square to a head beam (27) of rectangular tube. Weld a bracket leg (29) down from the beam's outer end, and fix support plates at both ends (31, 33).

Vifaa kwa hatua hii:

Mirija ya chumaMirija ya chuma1 kipande
Bamba la chuma lainiBamba la chuma laini1 kipande

Zana zinazohitajika:

Mashine ya Kulehemu ya MIGMashine ya Kulehemu ya MIG
4

Fit the trunnions and align the pivot

Fix a shaft through the head post with its ends out as trunnions (55a, 55b), in bushings in two bearing blocks (59a, 59b) bolted inside the channel webs. Each block has one close-fit bolt hole and three oversize ones: shift the blocks until the pivot is parallel to the bed plate, then torque the bolts. A set screw (67) takes out end play.

Vifaa kwa hatua hii:

Shafti ya chumaShafti ya chuma1 kipande
Bushi ya chumaBushi ya chuma2 vipande
Kishikio cha beringiKishikio cha beringi2 vipande
Bolti ya kichwa cha pembe sita - daraja 8.8Bolti ya kichwa cha pembe sita - daraja 8.88 vipande
Skrubu ya kubana yenye ncha ya kikombeSkrubu ya kubana yenye ncha ya kikombe1 kipande

Zana zinazohitajika:

Kekee cha NguzoKekee cha Nguzo
Spana ya Nguvu-MzungukoSpana ya Nguvu-Mzunguko
5

Mount motor, belt drive and gearbox

Mount the electric motor (37) on a plate (38) pivoted on the head beam, and couple it by a multi-speed belt and pulleys (41) to a gearbox (39). Fit the drive wheel (43) on the gearbox output shaft.

Vifaa kwa hatua hii:

Mota ya umemeMota ya umeme1 kipande
Bamba la chuma lainiBamba la chuma laini1 kipande
Mkanda wa kuendeshaMkanda wa kuendesha1 kipande
KapiKapi1 kipande
Gia boksiGia boksi1 kipande
Gurudumu la msumeno wa utepeGurudumu la msumeno wa utepe1 kipande

Zana zinazohitajika:

Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
6

Build the idler tensioner

Weld an idler yoke (87) of rolled steel plate, pivot it on the head beam with a pin (89), and cantilever the idler axle from it with the idler wheel (45) on bearings (85). A threaded rod (91) pulls the yoke through a coil spring (93) held between compression plates and a U-bolt (97); a knob (99) turns the rod. An indicator (101) on the spring reads the tension on a scale (103).

Vifaa kwa hatua hii:

Bamba la chuma lainiBamba la chuma laini1 kipande
Pini ya chumaPini ya chuma1 kipande
Shafti ya chumaShafti ya chuma1 kipande
Gurudumu la msumeno wa utepeGurudumu la msumeno wa utepe1 kipande
Fani ya MipiraFani ya Mipira1 kipande
Fimbo yenye nyuziFimbo yenye nyuzi1 kipande
Coil SpringCoil Spring1 kipande
Bolti ya UBolti ya U1 kipande
Kitasa cha kudhibitiKitasa cha kudhibiti1 kipande

Zana zinazohitajika:

Mashine ya Kulehemu ya MIGMashine ya Kulehemu ya MIG
Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
7

Build the two blade guides

In each guide channel (111) mount two guide rollers (115a, 115b) on ball bearings on eccentric bushings, one fixed and one adjusted to the blade thickness. Add a carbide thrust insert (133) on the blade's back edge and two carbide side inserts (137a fixed, 137b on a sprung swing bracket set by a bolt and knob). Clamp the guides on two bar tracks (107).

Vifaa kwa hatua hii:

Roli ya kuongozaRoli ya kuongoza4 vipande
Fani ya MipiraFani ya Mipira4 vipande
Bushi isiyo na kitovuBushi isiyo na kitovu4 vipande
Kipande cha kabaidiKipande cha kabaidi6 vipande
Coil SpringCoil Spring2 vipande
Kitasa cha kudhibitiKitasa cha kudhibiti2 vipande
Mirija ya chumaMirija ya chuma1 kipande

Zana zinazohitajika:

Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
8

Fit the blade and set the tension

By hand, run the endless blade (47) round the drive and idler wheels and through both guides; the rollers twist its lower run about 90° so the teeth face down. Turn the tension knob until the scale shows the tension you want.

Vifaa kwa hatua hii:

Bledi ya msumeno wa utepeBledi ya msumeno wa utepe1 kipande
9

Fit the feed cylinder and counterbalance

Connect a hydraulic cylinder (71) between bed channel and head post above the trunnions, filled with oil and piped through tubing (75) to a control valve (73): the valve sets the feed rate and, closed, holds the head. Fit a coil spring (78) on a threaded linkage (79) between an end gusset and the head post below the trunnions, adjusted by a knob (80), to counterbalance the head.

Vifaa kwa hatua hii:

Silinda ya haidrolikiSilinda ya haidroliki1 kipande
Mafuta ya haidrolikiMafuta ya haidroliki1 batch
Neli ya haidrolikiNeli ya haidroliki1 kipande
Vali ya kudhibiti mtiririkoVali ya kudhibiti mtiririko1 kipande
Coil SpringCoil Spring1 kipande
Fimbo yenye nyuziFimbo yenye nyuzi1 kipande
Kitasa cha kudhibitiKitasa cha kudhibiti1 kipande

Zana zinazohitajika:

Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
10

Bolt on the vice

Bolt the quick-acting vice to the bed plate to clamp the work square under the blade.

Vifaa kwa hatua hii:

Kibano cha mashineKibano cha mashine1 kipande
Bolti ya kichwa cha pembe sita - daraja 8.8Bolti ya kichwa cha pembe sita - daraja 8.81 kipande

Zana zinazohitajika:

Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa

Vifaa

29

Zana Zinazohitajika

4

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