A-A-50962 Forming Machine, Sheet Metal, Slip Roll, Hand Operated And Electrical Motor DrivenThis commercial item description CID covers hand operated and electrical motor driven, slip roll, sheet metal forming machines which are intended for producing cylindrical or conical sheet metal sections.

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A-A-50962A

TABLE I. Machine sizes and capacities, inches.

Capacity in mild steel Type I Type II

	Roll diameter,	Formed	Widt	Gage	Style A	Style B	Style A	Style B	Horsepower
Size	nominal	cylinder	h						(Minimum)
		inside diameter
2	1	1 1/2	12	22	x	-	-	-
3	1	1 1/2	16	30	x	-	-	-
5	2	3	12	16	x	-	-	x	1
7	2	3	24	20	x	x	-	x	1
8	2	3	30	22	x	x	-	-
9	2	3	36	18	-	-	-	x	1
10	2	3	36	22	x	x	-	x	1
11	2	3	42	24	x	x	-	-
12	2	3	48	22	-	-	-	x	1
13	2 1/2	3 3/4	36	18	x	x	-	x	1
14	2 1/2	3 3/4	48	22	x	x	-	x	1
15	3	4 1/2	36	16	x	x	x	x	1.5
16	3	4 1/2	42	18	-	-	-	x	1.5
17	3	4 1/2	48	16	x	x	x	x	1.5
18	3	4 1/2	48	18	x	x	-	-
19	4	6	48	14	-	x	-	x	1.5

20 4 6 72 18 - x - x 1.5

NOTE: The "x" denotes the availability of a machine size to the applicable classification.

3. SALIENT CHARACTERISTICS

3.1 General requirements. The forming machine shall meet the requirements of American National Standards Institute (ANSI) B11.12 and the requirements shown in table I. The machine shall be new and one of the manufacturer's current models capable of operation in accordance with the requirements herein. All parts subject to wear, breakage, or distortion shall be accessible for adjustment, replacement, and repair.

3.1.1 Rolls. The rolls shall be made of steel and shall be capable of forming sheet metal of the specified gage and width as shown in table I without permanent deformation of the rolls. The pinch roll shall be gear-driven on all machines. The top roll shall be gear-driven on machines using rolls larger than 1-1/2 inches and less than 3 inches in diameter. All rolls shall be gear- driven on machines using top rolls 3 inches or larger in diameter.

3.1.2 Pinch roll. The pinch roll shall be adjustable to accommodate different material thickness.

3.1.3 Rear roll. The rear roll shall be adjustable to form cylinders, alternate cylindrical and flat areas, and areas of differing radii. The rear roll shall be equipped with indicators to allow duplication of work.

3.1.4 Top roll. The top roll shall be capable of swinging out, or up, to allow for easy removal of formed cylinders.