Universal Sheet Nibbling Machines / Sheet Metal Nibbler

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Features:

- Suitable for small batch production jobs in lieu of big blanking dies and punches
- Useful for Sheet Metal Fabrication Industry, Electric Control Panel Makers, Cabs and Vehicle body makers, automobile fabrication manufacturers, etc.
- Length of tool stroke easily adjusted on variable steps
- Different operations need different tools
- The upper and bottom tools are changed in operation of beading, folding, flanging and punching
- The working principle of the nibbling machine is that the sheet is cut or formed between the fast reciprocating motion of the upper tool (powered by an electric motor and driven by an eccentric crank) and a stationery lower tool, by progressive punching as the sheet is fed.

Specifications:

Model: GN-3 GN-5 GN-8
Throat Depth (mm): 900 1000 1250
Max. circle diameter capacity from square blanks (mm): 740 830 1000
Length of stroke (mm): 1 - 8 1.5 - 9 2 - 10
No. of strokes per minute: 1440 1440 720 / 1440
Max. tool lift (mm): 15 15 25
Motor (HP) 2 3 5
Net / Gross Weight (Kgs.): 700 / 900 1250 / 1500 2200 / 2500
Overall dimensions (m): 1.8 x 1.6 x 0.5 2.0 x 1.6 x 0.5 2.8 x 2.0 x 0.6
Shipping Volume (m3): 1.5 1.6 3.4
Machine Capacity (Sheet Thickness) *:
  Model: GN-3 GN-5 GN-8
Shearing / Straight Cutting from the edge (mm): 3.2 5.0 8.0
inside with starting hole (mm): 3.2 5.0 8.0
sheet without starting hole (mm): 2.5 4.0 6.0
Nibbling from the edge (mm): 2.5 4.0 6.0
inside with starting hole (mm): 2.5 4.0 6.0
sheet without starting hole (mm): 2.0 3.0 4.0
Rectangular Notching sheet thickness / width of notch (mm): 2.0 / 8.0 3.0 / 10.0 4.0 / 12.0
Figure Cutting sheet thickness (mm): 2.0 3.0 5.0
Slot Cutting sheet thickness / width of slot (mm): 2.5 / 8.0 4.0 / 10.0 5.0 / 10.0
Louver Cutting sheet thickness (mm): 2.25 3.0 4.0
Beading sheet thickness / depth of bead (mm): 2.0 / 4.0 2.5 / 5.0 3.0 / 6.0
Folding sheet thickness / depth of fold (mm): 2.0 / 6.0 2.5 / 8.0 3.0 / 10.0
Flanging sheet thickness / height of flange (mm): 2.0 / 8.0 3.0 / 12.0 3.0 / 15.0
Dishing / Peening sheet thickness (mm): 2.0 2.5 3.0
Punching sheet thickness (mm): 1.5 2.5 3.0
Circle Cutting (Outside / Inside) sheet thickness (mm): 2.0 3.0 5.0

*- NOTE: The thickness capacity is for mild steel 45 kg / mm2

Standard Accessories: Two slides for attachment mounting, set of tool holders with figure cutting bits, electric motor, push button starter provided with over-load trip, set of operating keys, set of operating spanners, filler gauge

Optional Accessories: Anti-vibration pads, hand pushed straight feeding attachment, circle cutting attachment (Inside / Outside), nibbling tool, louver cutting tool, beading tool, rectangular notching tool, dishing tool, flanging tool, slot cutting tool, punching tool, folding tool, ball top table

 

   

VIDEO SHOWING NIBBLING MACHINE MODEL: GN-5 IN VARIOUS OPERATIONS

 

 

* - Hand pushed straight feeding attachment is necessary for these operations.
- All tools except set of tool holders with figure cutting bits are optional.

 
1. Shearing Tools are available for straight cutting, figure cutting, (contour cutting) and circle cutting operations. The shearing length per cut is small and there is no wastage of materials.

2. Nibbling is a continuous punching operation with a circular tool and is used for producing internal and external cut-outs of any shape. The work-piece does not warp but the edges produced may require little filing, depending on the end use. The fixed nibbling tool is a solid punch cutting at one side. The punch and die clearance is provided to suit the sheet thickness and the feed is controlled by the tool design.

3. Rectangular Notching is a continuous punching operation with a square punch and die. It is used mainly for producing internal rectangular cut-outs. The tool cuts in two directions and the edges produced are clean.

4. Figure Cutting can be done with both the processes i.e. round nibbling die punch as well as with the help of shearing tools. It is a quick and economical way to produce the parts or cut-outs of any shape and size.

5. Slot Cutting is done with a double-edge cutting tool, which avoids warping of sheets. Suitable for parting of sheets, cutting small strips and slots. The upper tool has to be changed for each slot width while the bottom tool is adjustable.

6. Louver Cutting is a combined shearing and forming operation. The sheet is first cut and then the louver is formed with the forming part of the tool. The length of the louvers produced is independent. This operation as well as beading, folding and flanging are completed in 2 to 3 passes. After every pass the tool is fed further towards the sheet with the help of a hand wheel.

7. Beading is a forming operation used for the stiffening (providing strength) of sheets.

8. Folding is a forming operation and by double folding, channels may be made for housing of electrical wiring, etc.

9. Flanging is a forming operation very commonly used on sheet metal parts. 0o to 90o flanging is possible by changing the lower tool. 2 to 3 passes are generally required and intermediate annealing may be necessary in some cases to get the correct angle of flange.

10. Dishing or Peening is a mechanical hammering operation used for forming dished parts like tank bottoms. The quality of dishes formed depends on the skill of the operator.

11. Punching is possible with special punch and dies sets. Round and Square holes such as the ones needed for fixing lamps or push buttons etc. on panels can be produced on these machines by providing a shear on the punch

12a. Circle Cutting (Inside) attachment is capable of cutting small holes from 100 mm diameter up to 75% of the throat depth of the machine.

12b. Circle Cutting (Outside) attachment is capable of cutting large circles. Centre punch mark is necessary for sheet thickness up to 2 mm. Centre locating hole of 5 mm is require for sheet thickness above 2 mm.

Maneklal and Sons (Exports)
67 Bajaj Bhavan, Nariman Point, Mumbai - 400021, INDIA
Tel: +9122-22041340 / 41 / 42. Fax: +9122-22041389
WhatsApp: +918879795490
e-mail: sales@maneklalexports.com / maneklalexports@gmail.com / Enquiry Form

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