12 X 39 Knuth Universal Cylindrical Grinder

12" X 39" Knuth Universal Cylindrical Grinder

Stock Number: NG48001

Cincinnati RSM 1000C

Condition: New

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Working Area 
Center Height7"
Grinding Diameter0.3 TO 12.6"
Wtih Steady Rest2"
Grinder Length39"
Inside Grinding Diameter With Rest1.4 To 3.9"
Inside Grinding Diameter Without Rest1.2 To 3.9"
Inside Grinding Depth4.9"
Work Piece Weight Between Centers (Max.)330 Lbs.
Grinding Wheel Feed (Min)0.0001 "
Chuck Diameter8"
Table Swivel Range (Max)-3 Degree /+7 Degree
Wheel Speeds1,365 In/s
Work Spindle Speeds50 Hz. 25-220 Rpm's
Grinding Head Travel10"
Table Feed, Infintely Variable3.9-156 In/Min.
Feed Per Hand-Wheel Rotation X Axis0.0394 In.
Feed Per Scale Division X -Axis0.000098 In.
Run-Out Deviation0 In.
Cylindrical Deviation0.00039 In.
Working Headstock Swivel Range0-45 Degree
Working Spindle TaperMK4
Grinding Headstock 
Grinding Spindel Speed0-1,670 Rpm's
Grinding Headstock Swivel Range30 Degree
Tailstock TaperMK-4
Tailstock Quill Stroke1 In.
Drive Capacity 
Motor Rating Main Drive11.9 Hp.
Motor Rating Grinding7.4 Hp.
Motor Rating Inside Grinding1.5 Hp.
Motor Rating Hydraulic Pump1 Hp.
Motor Rating Working Spindle2 Hp.
Motor Rating Coolant0.2 Hp.
Measures And Weight 
Grinding Wheels Dimensions16" X 2" X 8"
Grindstone Dimensions, Inside Grinding (Max)2 X 1 X 0.5 In.
Grindstone Dimensions, Inside Grinding (Min)0.7 X 0.8 X 0.2"
Overall Dimensions 
Length X Width143" X 72"
Weight8,140 Lbs.

Equipped With:
Large machine bed in a heavy design accommodates workpieces with lengths up to 39 inch and diameters up to 12 inch wide, precision-ground guideways ensure maximum accuracy across the entire workpiece length and accommodate high workpiece weights. The table features large dimensions and swivels in two directions - table movement via hand-wheel or automatically via linear hydraulic feed The robust feed valve allows very precise micro-feed control on the X axis, including a user-adjustable dwell time at the end of the longitudinal table travel Hydraulic ratchet feed simplifies exact X axis positioning, limited by an adjustable zero stop, and repeated feeds by the push of a button The adjustable grinding spindle features superior bearings and provides for maximum precision and surface quality, plus extraordinary tool life and rigidity The grinding spindle motor provides up to 7 HP power and is designed for continuous operation The heavy-duty spindle head swivels 30 to the left and to the right; the work spindle head swivels 45 Standard inside grinder for grinding parts with diameters up to 4 inch Integrated rapid feed on Z axis with manual return. Standard Equipment: 2-axis position indicator, internal grinding equipment, open rest, closed rest, 3-jaw chuck, 7.87", coolant system, grinding wheel dresser, balancing station, balancing mandrel, grinding wheel flange, grinding wheel, center point, front and rear splatter guard, drivers, operating tools, operator manual, test certificate


12 X 39 Knuth Universal Cylindrical Grinder
N & R Machine Sales
9292 Industrial Drive
Navasota, Texas 77868
936 825 2600
936 825 2679

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