A patented rack and pinion system with bearing supported rollers engaging two rack teeth simultaneously to achieve the following specifications: Zero Backlash Lube Free Operation No Cumulative Error High Corrosion Resistance 99% Efficient Accuracy of ±30µm [ .001 in] Rated Life of up to 30 million contacts Speeds of up to 11 m/s [36 ft/s] Unlimited Length Possible