For turning large parts, the Chester BB Series offer high quality precision components, for heavy engineering.

Please contact us for more info.


• Dynamically Balanced Spindle

• Hardened and  Ground Guideways

• Low Spindle  Speeds

• Large Spindle  Bore

• Motorised Saddle

• Heavy Duty  Construction

• Gap Bed

• Forward/Reverse Clutch

Model 830BB 1030BB 1230BB
Centre Height  415mm 515mm 615mm
Swing over Bed  830mm 1030mm 1230mm
Distance Between Centres 1000,1500,2000,3000,4500,6000mm
Swing over Carriage  500mm 700mm 900mm
Swing over Cross Slide  500mm 700mm 900mm
Swing in Gap  1090mm 1290mm 1490mm
Gap Length in Front of Face Plate 380mm 380mm 380mm
Cross Slide Travel  415mm 515mm 615mm
Top Slide Travel  225mm 300mm 300mm
Width 610mm 610mm 610mm
Spindle Nose D15 D15 D15
Spindle Bore  160mm 160mm 160mm
Taper Reduction in Sleeve Metric 170 Metric 170 Metric 170
Number of Spindle Speed Ranges 18 18 18
Range of Spindle Speeds  Forward 8-637 r/min

Reverse 14-610 r/min

Forward 8-637 r/min

Reverse 14-610 r/min

Forward 8-637 r/min

Reverse 14-610 r/min

Quill Diameter  120mm 120mm 120mm
Quill Travel  260mm 260mm 260mm
Quill Internal Taper MT6 MT6 MT6
Feeds Range and Gearbox
Logitudinal Feeds  0.07-16.72mm/r 0.07-16.72mm/r 0.07-16.72mm/r
Cross Feeds  0.04-9.6mm/r 0.04-9.6mm/r 0.04-9.6mm/r
Metric Threads  1-240/53mm/kinds 1-240/53mm/kinds 1-240/53mm/kinds
Imperial Threads  30-2 tpi/31 kinds 30-2 tpi/31 kinds 30-2 tpi/31 kinds
Module Threads 0.25-60/46mm/kinds 0.25-60/46mm/kinds 0.25-60/46mm/kinds
Diametrical Threads  60-0.5/47Lpi/kinds 60-0.5/47Lpi/kinds 60-0.5/47Lpi/kinds
Pitch of Leadscrew  12 mm 12 mm 12 mm
Main Motor  15kw 15kw 15kw
Coolant Pump Motor  0.15kw 0.15kw 0.15kw

• Digital Readout (Up to 3000mm)  

• 3-Jaw Chuck

• 4-Jaw Chuck

• Fixed Steady

• Travelling Steady

• Coolant System

• Lamp


• Taper Turning Attachment

• Bigger Bore (130mm)

• Quick Change Tool Post 

• Face Plate


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