H1438 LH Hardened Steel WormWhen used with worm gears, Boston Gear worms provide an effective answer for power transmission applications requiring high ratio speed reduction in a limited space using right angle (90), non intersecting shafts. Manufactured from acetal, nylon, and hardened and unhardened steel, they offer the smoothest, quietest form of gearing when properly applied. Because the efficiency of a worm gear drive depends on the lead angle and number of starts on the

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solid bronze bearing material

a same-hand helix angles must be used

always remember that the difference in the number of teeth between the internal gear and pinion should not be less than 15 (14 1/2° PA) or 12 (20° PA)

Click here for spec sheets: BUCNPFL Spec Sheet

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high impact and abrasion

Effective on both hard and soft shafts

Click here for spec sheets: UCFC Spec Sheet

While 20° PA is generally recognized as having a higher load-carrying capacity