Heavy Industrial SPM
Model: NCT-SPM-32
Comprehensive Machine Overview
The Inner Prop Welding Machine is a dedicated industrial system engineered by National Cutting Tools for <p>The Inner Prop Welding Machine is designed for circular fillet welding of top plates, base plates, and end fittings onto the inner telescopic tubes of adjustable steel props (Acro props). Manual welding of prop plates often produces uneven throat thickness, resulting in failure under axial load tests. This machine rotates the inner tube smoothly under an automated welding torch to lay down high-integrity structural fillets.</p>.
<p>Featuring a heavy-duty pneumatic clamp assembly and a hollow spindle drive, the machine accommodates inner prop tube diameters of 48.3 mm OD in lengths from 1.0 m to 4.5 m. The control system regulates rotation speed, overlap angle, and arc crater time to produce leak-tight, load-certified weld joints that meet BS 4074 and EN 1065 specifications.</p>
<h3>Key Features</h3>
<ul>
<li><strong>Precision Rotary Headstock:</strong> High-torque geared drive provides steady rotation without jerking, guaranteeing uniform weld penetration throughout the 360-degree bead.</li>
<li><strong>Pneumatic Base-Plate Locator:</strong> Heavy-duty pneumatic ram presses the base or top plate flat against the square-cut tube end before arc strike.</li>
<li><strong>Adjustable Tube Support Rollers:</strong> Ball-bearing steady rests along the bed prevent sagging of long inner tubes during high-speed rotation.</li>
<li><strong>Programmable Weld Overlap:</strong> Microprocessor timer allows setting 10 to 30 degrees of rotational overlap to prevent crater crack formation.</li>
<li><strong>Heavy Welded Box Frame:</strong> Monobloc chassis absorbs mechanical load and maintains alignment over continuous two-shift production schedules.</li>
</ul>
<h3>Applications</h3>
<ul>
<li>Adjustable steel prop (Acro prop) inner tube fabrication</li>
<li>Shoring prop and push-pull prop plate assembly</li>
<li>Light structural column base plate attachment</li>
<li>Formwork support pipe end welding</li>
</ul>
<p>Manufactured at the National Cutting Tools facility in Ludhiana, Punjab. Each machine is tested for spindle runout, pneumatic pressure retention, and weld consistency before shipment to clients across India and the Middle East.</p>
Engineering Data Matrix
| Technical Parameter | Operational Specification / Value |
|---|---|
| Specification | Details |
| Operation | Automatic |
| Air Pressure Required | 4 to 5 Bar |
| Length Adjustment | 500 to 3000 mm |
| Supply | 1 Phase, 220 Volts ±5% / 3 Phase, 415 Volts ±5% |
| Power | 1 K.V.A., 9 K.V.A. Max. |
| Operating Voltage | 24 Volts |
| Control | PLC with Touch Screen / Digital |
| Production | Approx. 400-450 units |
| Dimensions | 14(L) x 2.5(W) x 5.3(H) Feet Approx. |
| Weight | 650 Kgs. Approx. |
| Flexible power supply | 1 Phase 220V ±5% or 3 Phase 415V ±5%. |
Inner Prop Welding Machine Works QA & Export Packaging Protocol
✓ Circumferential Arc & Pneumatic Alignment Trials
- • Rotary Spindle Concentricity: Spindle chuck and pneumatic tailstock axial alignment verified within 0.08 mm to ensure uniform rotation without tube run-out.
- • Continuous Arc Cycle Testing: Minimum 25 continuous 360-degree weld runs executed on sample pipes to verify torch angle, arc stability, and bead penetration.
- • Macro-Etch Penetration Check: Cut-section metallurgical inspection of weld beads to confirm root penetration meeting BS 1139 and EN 12810 standards.
- • Run-Off Video Recording: Trial welding cycle on your specified tube diameter recorded in HD and shared for formal technical sign-off prior to dispatch.
Seaworthy Automated Station Packaging (ISPM-15)
- • Torch Carriage Bracing: Pneumatic slides, welding torch brackets, and rotary spindles locked with heavy-duty mechanical transport braces.
- • VCI Moisture Protection: Copper heat sinks, clamping jaws, and bare electrical contacts treated with volatile corrosion inhibitor (VCI) film.
- • Solid Timber Crating: Fumigated ISPM-15 certified solid pine wood crate with waterproof polyethylene outer envelope.
- • Container Lashing Points: Heavy structural skid base with internal corner tie-down brackets for ocean container transport.
International Shipping Destinations & India Supply Network
National Cutting Tools manufactures and configures the Inner Prop Welding Machine for seamless integration into international fabrication lines and domestic scaffolding manufacturing plants. All machinery is customized for local electrical grids, certified for regional compliance, and dispatched with seaworthy protective packaging.
Primary International Export Destinations
All Export Hubs →Pan-India Fast Freight Dispatch (Ludhiana Works)
India Directory →Full-truckload (FTL) and part-load freight dispatch directly from our central manufacturing works at Focal Point, Ludhiana. Factory engineers provide on-site leveling, tool alignment, and operator training across all major industrial manufacturing clusters:
Frequently Asked Questions • Inner Prop Welding Machine
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