Boring bar rotation and feed are fully gear-driven. Combined with the 2 HP drive motor, this ensures rapid, chatter-free cuts and extended longevity compared to belt-drive systems. Speed and feed rates have a wide range of adjustments to match the characteristics of engine block material and the size of the bores. Because of the convenient controls, the operator can keep close watch on the boring process and can easily make speed adjustments if necessary.
Larger sizes available upon request
Maximum Length of Block100 in2500 mm
Minimum Distance Bed to Bar Center Line24.8 in630 mm
Maximum Distance Bed to Bar Center Line37.8 in960 mm
Boring Diameter Range1.1-7.8 in28 -200 mm
Speed of SpindleVariable 90-580 RPM
Maximum Spindle Travel16.9 in430 mm
Electric Motor2 HP
Overall Dimensions (L x W x H)157.7 in x 25.6 in x 65 in4000 mm x 650 mm 1650 mm
Approx. Machine Weight3417 lbs.1550 kg
A special feature of the LB Series machines is their unusually long spindle travel which allows blocks to be bored with fewer interruptions to reposition the tooling.
Base castings are exceptionally heavy to eliminate any possibility of deflection, while the precision machined surfaces and excellent universal fixtures position work pieces securely during operation.
Winona Van Norman Inc. of Wichita Kansas is unaffiliated with the now defunct Wisconsin Company that went by the name Winona Van Norman; D & S Manufacturing Inc. or the Winona Van Norman Division, and the Van Norman Group of D & S Manufacturing Inc..