CertainTeed Machine Works has introduced the Glass Master SG-420 Duct Board Grooving Machine – a powerful machine that fabricates high-quality fiberglass spiral ducts more accurately, and up to 50 times faster than standard hand-cutting techniques.

The SG-420’s four drive rollers and ¾ horsepower motor provide the necessary grip and power to quickly pull duct board through the 21 tools required to form spiral duct liner. Precision-ground and hardened tool blades generate clean grooves and consistent contours and duct dimensions.

Like CertainTeed’s Glass Master SG-220, the SG-420 can be easily adapted to groove 1″, 1 ½” and 2″ boards. Its square duct tool holders include a unique measuring tab for easy and accurate groove spacing, and quick-release clamps on all tools allow for fast repositioning. Standard features include a foot-actuated switch for safe operation, four swivel casters and a durable powder coat finish.

The SG-420 not only simplifies the process of creating spiral duct systems with top-quality square and rectangular ducts but also enables contractors to easily manage even the most complex spiral duct projects. For more information on CertainTeed Machine Works Glass Master products, visit https://www.certainteed.com/glass-master.