FIT-UP PRO’s Spider Clamp Series 400 offers precision alignment for two hollow cylindrical components of different diameters. With independent expanding clamps for each part, the tool ensures secure clamping from 2 – 36″ / 54 – 940 mm internal diameter. Made with stainless steel locating rails, it’s ideal for heavy components such as flanges and elbows. A bottom knob sets the pipe clamp, while a top hand-bar secures the mating part. The Spider Clamp 400 series is a specialized, stainless-compatible solution for challenging pipe alignment needs, streamlining welding setups and reducing time on heavy jobs.
SPIDER CLAMP – SERIES 400
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| New Part No. | Old Sumner Part No. | Clamping Range ID | Weight |
| * 400-1 SS | 784100 | 2 – 6″ / 54 – 140 mm | 3.31 lbs / 1.50 kg |
| * 400-2 SS | 784102 | 4 – 8″ / 85 – 220 mm | 9.15 lbs / 4.15 kg |
| * 400-3 SS | 784103 | 6 – 14″ / 120 – 350 mm | 26.01 lbs / 11.80 kg |
| * 400-4 SS | n/a | 8 – 20″ / 180 – 520 mm | 65 lbs / 30.00 kg |
| * 400-5 SS | n/a | 16 – 36″ / 400 – 940 mm | 145 lbs / 65.00 kg |
* Suitable for stainless steel
This model has two independent expanding clamps, allowing independent alignment of two hollow cylindrical components of different diameters. The bottom expanding clamp is inserted and clamped in the pipe by means of the knob.
Then the other part (e.g., a flange) is placed over the top expanding clamp and clamped by means of the hand-bar. This model is specially suited for heavy parts. All locating rails are in stainless steel.
Product Advantages
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Two independent expanding clamps for aligning different diameter components
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Ideal for pipe-to-flange alignment and similar fit-up tasks
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Designed to handle heavy parts with stable positioning
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Lower clamp tightened with adjustment knob for secure pipe hold
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Upper clamp secured with hand-bar for precise alignment
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Stainless steel locating rails for durability and corrosion resistance
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Improves accuracy and efficiency during fabrication and assembly
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