Flat-bulb karfe

Flat-bulb ƙarfe sune mafi inganci, inganci da juriya mai juriya don ƙaƙƙarfan buƙatun farantin. Babban fa'idodin sun haɗa da kyakkyawan ƙarfi zuwa rabon nauyi yana isar da juriya a ƙaramin nauyi fiye da sanduna lebur ko kusurwoyi.
Keɓaɓɓen gefuna na bayanin martaba-karfe yana nufin babu buƙatar niƙa a gefe kafin fenti, adana lokaci da kuɗi yayin ƙirƙira. Rushewar fenti da gina tarkacen tarkace kuma an rage shi, yana ƙara aikin rayuwa.

Girman ƙima (mm)			Mass/tsawon raka'a
b×t ×h	r1	r
80×6×20	4	≤2	4.88
100×7×22.5	4.5	≤2	6.86
100×8×23.5	4.5	≤2	7.65
120×6×23	5	≤2	7.32
120×7×24	5	≤2	8.26
120×8×25	5	≤2	9.2
140×7×26	5.5	≤2	9.75
140×8×27	5.5	≤2	10.85
140×10×29	5.5	≤3	13.05
160×7×29	6	≤2	11.46
160×8×30	6	≤2	12.72
160×9×31	6	≤2	13.97
160×11×33	6	≤3	16.49
180×8×33	7	≤2	14.8
180×9×34	7	≤2	16.22
180×10×35	7	≤3	17.63
180×11×36	7	≤3	19.04
200×9×37	8	≤2	18.57
200×10×38	8	≤3	20.14
200×11×39	8	≤3	21.71
200×12×40	8	≤3	23.28
220×10×41	9	≤3	22.77
220×11×42	9	≤3	24.5
220×12×43	9	≤3	26.22
240×10×44	10	≤3	25.5
240×11×45	10	≤3	27.39
240×12×46	10	≤3	29.27
260×10×47	11	≤3	28.35

Girman ƙima (mm)			Mass/tsawon raka'a
b×t ×h	r1	r
260×11×48	11	≤3	30.39
260×12×49	11	≤3	32.43
280×11×51	12	≤3	33.5
280×12×52	12	≤3	35.7
280×13×53	12	≤3	37.9
300×11×54	13	≤3	36.7
300×12×55	13	≤3	39.09
300×13×56	13	≤3	41.44
320×12×58	14	≤3	42.6
320×13×59	14	≤3	45.09
320×14×60	14	≤4	47.6
340×12×61	15	≤3	46.2
340×13×62	15	≤3	48.86
340×14×63	15	≤4	51.5
370×13×66.5	16.5	≤3	54.7
370×14×67.5	16.5	≤4	57.6
370×15×68.5	16.5	≤4	60.5
400×14×72	18	≤4	63.96
400×15×73	18	≤4	67.1
400×16×74	18	≤4	70.2
430×14×76.5	19.5	≤4	70.6
430×15×77.5	19.5	≤4	73.9
430×17×79.5	19.5	≤4	80.7
430×19×81.5	19.5	≤4	87.4
430×20×82.5	19.5	≤4	90.8
Lura: Tsawon da ake samu shine 6m-20m, kuma maki shine A, B, D, AH32, AH36, DH32 da DH36, da fatan za a tuntuɓe mu don wasu buƙatu.