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70″, 80″, 100″ Big Swing Lathes

Spindle Bore: 8″, Center Distances: 80″ to 480″

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Designed to provide the precision and rugged reliability required for today’s demanding applications, we are proud to offer the newly redesigned Summit® 70″, 80″, 100″ Series Big Swing Hollow Spindle Lathes.
The Big Swing lathes are available in center distances from 80″ to 360″ with a 9″ spindle bore to cover a wide range of workpieces and feature castings that are heavily ribbed for rigidity and vibration dampening. The headstock is designed with straight cut final drive gears to provide quiet and efficient operation through the full range of spindle speeds. The extra wide (52.9″) bed ways are hardened and precision ground to provide high accuracy and long life and the bed is constructed from high-grade alloyed cast iron, normalized and aged to achieve maximum stability.

  • Quick Change Gear Box Will Cut Inch and Metric Threads
  • Hardened & Precision Ground Bed Ways
  • 6-way Rapid Traverse
  • Two Speed Tailstock
  • Easy Access Control Station
  • Infinitely Variable Spindle
Included Accessories
  • Steady rest
  • Follow rest
  • Thread dial
  • Chuck Guards
  • Halogen Work Light
  • Coolant System
  • 4 Jaw Chuck
Specifications: 70″ 80″ 100″
Swing over bed 70.8″ 78.7″ 98.4″
Swing over cross slide 53.1″ 61″ 80.7″
Workpiece Weight
Between Centers 77,000 lbs / 35,000 kg
Spindle Bore 8″ / 210mm
Spindle speeds (4) 5-400 Infinitely Variable
Spindle nose A2-15
Cross Slide Travel (Full Length) 49.2″ / 1250 mm
Compound Travel (X1) 9.8″ / 250mm
Compound Travel (Z1) 15.7″ /400mm
Quill Diameter 11.4″ / 290mm Rotary Quill
Quill Travel 11.8″ / 300mm
Quill Taper #7 MT
Width of bed 52.9″ / 1345mm
Main drive motor 75 HP
Shipping weight (based on 200″ centers) Approx. 81,400 lbs
Summit Machine Tool
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Summit Machine Tool
518 N Indiana Ave
Oklahoma City, OK 73106

Toll Free: (800) 654-3262
Local: (405) 235-2075
Fax: (405) 232-5169
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