N-TWO Cryogenic - Shrink Fitting

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In order to fit slightly oversized metal items into mating parts N-TWO technicians travel to your site and apply shrink fitting techniques to the affected parts.

ADVANGTAGES

• Increased Shrinkage: 0.002” per 1” on steel / 0.0035” per 1” on bronze
• Faster and more effective than dry ice
• Low cost; Less effort
• No need for customary heat and force fitting

APPLICATIONS

• Insert metal shafts into metal wheels and hubs
• Press fit steel or brass rings around shafts
• Fit guide pins into die shoe
• Insert brass bushings into hub
• Free metal stamping press
• Disassemble metal parts with less force:
ex. separate bullgear from shaft; remove shaft from impeller; remove large bushing from hub

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Shrink fitting using liquid nitrogen allows contraction of metal items without mettalurgic change.

1. When parts are oversize and need to fit.

2. Liquid Nitrogen is fed into a containment unit that isolates the area to be fitted.

3. The shrinking permits fitting of slightly oversized metal items into mating parts.