Pittsburgh Lock Former Machine Operation Manual


  1. Pittsburgh Lockformer Machine Pictures
  2. Machine Model and Technical Parameters
  3. Performance and Usage
  4. Pittsburgh Locking Machine Structure
  5. Adjustment and Use
  6. Electrical Schematic Diagram
  7. Guiding Rule Adjustment Schematic Diagram


1. Pittsburgh lock former machine pictures

Multi-function Nip MachineCombined Elbow Nip Machine Combined Nip Machine
Multi-function Nip MachineCombined Elbow Nip MachineCombined Nip Machine

2. Model and Technical Parameters

Model and Technical Parameters of pittsburgh lockformer machine

3. Main Function and Performance

  • The pittsburgh lockformer machine is specifically designed for producing various square or rectangle ventilation duct. Our company Pittsburgh Locking Machine is SA12-SA15HB. Forming steel plate thickness 0.5-1.5mm (separately listed on Page 2- Machine Pictures).
  • With features of small size, light weight, easy to move, simple operation and reliable, the pittsburgh lockformer machine is especially suitable for on-site manufacturing exhaust duct in industrial and mining, enterprises, hotels, shopping malls.
  • Use cases

pittsburgh lockformer machine application


4. Pittsburgh Locking Machine Structure

Consists of the following three parts:

A. Worktable

B. Transferring and forming

C. Elbow head

pittsburgh lockformer machine structure


1) For single flat mouth, tighten the second upper bolt on right discharging port and loosen the right angel bolt.

Matters need attention:

① For SA-12—SA-15HB Pittsburgh locking machine, the thickness of side plate, double-screw bolt④, disc-shaped spring(4a)are adjustable. Four-bolts ③、④ are fixed.

A. Worktable

The trunk is a welded shell structure which is made by angle steel and thin steel sheet, with a fixed worktable panel on sheet top, the panel is equipped with horizontal lead-in positioning plates ①、② and four fixed lead-out positioning plates, see fig 2.

pittsburgh lockformer machine Forming Parts Chain power chain

(Fig. 3)Transferring System

B. Conveying and Forming

The entire drive section is an open gearbox. Passed through the gear shafts11, 12,13,14 and gears 16, 17, 18, 19 to the forming section, gear 19 separately drive Ⅲ down gear 35 and Ⅳ down gear 35, then through the multiple bridge gears driving the entire motion system.

Pittsburgh locking machines are generally equipped with 6 -7 pairs forming shafts, each pair shaft is equipped with drive gear 35 and left and right two columns or left, center and right three columns of rolling reels.

(Fig. 3) is a comprehensive transmission diagram, however, not all machines  are equipped with all the components listed in the fig, such as  SA-12、SA-15、SA-12H、SA15 machine without 201-214 rolling reel.

C. Elbow Head

Structural Principal: (one fig.2 top),through bevel gear (5)、(7)drive gear (10)and rolling reel (8)and(9), the work piece will be put into the reel gap and forming fan-shaped work piece into a certain height of the right angle bone, as shown in fig.1: E=(1)+(6)

Elbow Head of pittsburgh lock former machine


Elbow head is a dedicated parts installed on the top of Pittsburgh Locking Machine ( as shown in fig.2: C), mainly used for right angle bone, that is, bending the fan-shaped plate into a certain height of right angle edge( see fig.4). Connect this kinds of right angle and “pittsburgh shape”shaped plate with a flange edge to make angle pipe connector.

Each mode of Pittsburgh locking machine will be equipped with a elbow components according to the user demand, for example change SA12C into SA12BC.

5. Adjustment and Use

The pittsburgh lock former machine can be used to connect or fold, but can’t roll, so when use the machine, some gap between the upper roller and lower roller is necessary, and the gap is about the minimum plate thickness plus 0.1-0.2 ( 3 ). The gap have be adjusted before delivery, users should not arbitrarily rotate the limit screw (3) and fastening nut (4) and disc spring (4a)( as shown in fig.2 and 5).

roller adjustment of pittsburgh lockformer machine


In case of the gap change due to screw (3), nut (4) becoming loosen, or caused by other reasons, first, loosen the nut (4), and put a pair of spacer of the same thickness as  among the leftmost four groups of rollers, then adjust the limit screw (3) until the four gap basically parallel, Re-lock the nut (4),[=Min. plate thickness+0.1-0.2mm], if minimum thickness, put the spacer and leave a slight space.

Right angle roller 300 part, manually adjust the roller and disc-shaped spring, keep the thin sheet “” shaped 90°.

②Bone Shape Adjustment:

Loosen the screws (1) and (2) on leading-in positioning plate and move the guiding plate in horizontal direction to widen or narrow the forming parts. Wide plate  , narrow plate , wide plate  ,narrow plate .

③Elbow use and adjustment ( fig. 7 )

First, bending the workpiece head into 90°,length 15mm, height H (SA15-HB H=10mm, others 8mm) (as shown in fig.6). then insert the B end among (8) and (9) in narrow direction ( as fig.7),  then fasten screw (40), start the machine, hard push the plate along with the guide rotor into rolling roller.

Elbow use and adjustment

6. Electrical Schematic Diagram ( Three-phase )

Electrical Schematic Diagram of pittsburgh lockformer machine

7. Guiding Rule Adjustment Schematic Diagram

Guiding rule adjustment diagram of pittsburgh lockformer machine


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