The Johnford SV-41 is a Super Vertical that combines speed, rigidity and precision in a heavy duty Vertical Machining Center. This machine has features not found on competitive machines at any price. It features square box ways on all axes with large diameter pre-tensioned ballscrews, and a large diameter rigid spindle for heavy cutting. The Y axis features 4 box ways for unparalleled support and accuracy. The Z axis is hydraulically counterbalanced for increased speed and smooth operation. Special Turcite and hand scraping allow the SV-41 to rapid at 1181 IPM in the X and Y axes. As in any high quality machine tool, the SV-41 is made from heavy Meehanite FC-30 castings. Cast iron has the strength and vibration dampening characteristics necessary for excellent surface finishes and long cutting tool life.
A standard 24 tool high speed arm type automatic tool changer provides fast 1.3 second tool changes for maximum productivity. The 70mm (2.75”) spindle shaft has 7 bearings for unparalleled stiffness and cutting stability. The standard class 7 steel bearings allow standard spindle speeds up to 10,000 RPM. With the use of the optional IDD spindle, speeds can run up to 15,000 RPM. 18,000 or 24,000 RPM Weiss integral spindles with HSK-63A tooling are available for ultra high speed machining. For applications requiring high torque at low RPM, a standard 2 speed geared head gives full power at only 455 RPM. The twin rear discharge screw type chip conveyor and high volume flush system efficiently handles chips and minimizes cleaning time.
The 40mm (1.57”) diameter ballscrews are class 3 with a double nut pre-loaded design. To eliminate thermal growth and promote high accuracy and high speed positioning, the ballscrews are pre-tensioned. High torque servo motors are direct coupled to the ballscrews for accuracy.
Your choice of Fanuc controls provides the ideal combination for all types of applications. The Fanuc OiM-F Plus control is standard to provide you with state-of-the-art controllers and the latest in servo and spindle technology. For more demanding 3-D applications, the Fanuc 31iM-B Plus with ultra high speed machining functions is optional.
Travels
Longitudinal Travel (X) Axis 41.3"
Cross Travel (Y) Axis 24"
Vertical Travel (Z) Axis 24"
Table to Spindle 3.94" min/28" max
Spindle Center to Column 25.2"
Table
Table Working Surface 47.2" x 23.6"
Maximum Workload on Table 2640 LBS.
Table Surface Ground / T-slotted
No. of T-slots x Width 5 x 18mm
Spindle (standard)
Spindle Motor 15 HP high torque
Spindle Torque 170 ft/lbs
Spindle Taper ISO-40
Spindle Drive System 2 speed ZF gearbox
Spindle Speed 25-10000 RPM
Spindle (Optional Johnford Isolated Direct Drive (IDD))
Spindle Motor 25HP high torque
Spindle Torque 59 ft/lbs
Spindle Taper ISO-40
Spindle Drive System IDD
Spindle Speed 0-15000 RPM
Spindle (Optional Weiss Integral Motor Spindle)
Spindle Motor 31 HP high torque
Spindle Torque 53 ft/lbs
Spindle Taper HSK-63A
Spindle Drive System Integral Motor
Spindle Speed 0-24000 RPM
Automatic Tool Changer (arm type)
Number of Tools 24 tools (32/40 optional)
Tool Selection Bi-directional-random
Tool Change Time 1.3 sec tool to tool
Maximum Tool Diameter 3" with adjacent tools
Maximum Tool Weight 22 LBS
Tool Type CAT-40 (BT-40 opt)
Maximum Tool Length 12"
Ballscrews and Axis Motors
X-Y-Z Ballscrew Diameter 40mm (1.57”) x 16 pitch
Ballscrew Type Class 3 double nut pre-loaded
Ballscrew Mounting Type tensioned
X-Y-Z Servo Motor HP 3.0HP
Servo Motor Mounting Direct coupled
Feeds
Rapid Traverse Rate X,Y,Z 1181, 1181, 787 IPM
Cutting Feed Rate 0.01 - 472 IPM
Positioning Accuracy +/- .0002" full stroke
Repeatability +/- .00008"
General
Coolant Tank Capacity 75 gallons
Machine Weight 18,000 LBS
Floor Space 118" X 135" x 112"
Machine Power Source 208/220 Volts, 3 Phase 75 Amps**
Air Source 90 PSI
Automatic Pallet Changer (option)
Table Working Surface 47.2" x 23.6"
Maximum Workload on Pallet 1320 LBS.
Pallet Surface Milled / T-slotted
No. of T-slots x Width 5 x 18mm
Pallet Change Time 20 seconds
Standard Machine Accessories
Flood Coolant System with programmable air blast
Air blast for spindle
Auto Lubrication with Alarm
Full machine enclosure
Halogen Work Lamp
Twin screw type chip conveyors and chip flush system
Remote Handwheel
Heat exchangers for control cabinets
Rigid Tapping
Spindle oil cooler
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