Description
Johnford SL-500A CNC Slant Bed Lathe – Year 2018
Capacities
Swing over bed/Front cover 22.8”
Standard turning diameter 17.7”
Swing over carriage 17.7″
Maximum cross travel (X axis) 9.45″
Maximum longitudinal travel (Z axis) 23.2″
Distance between centers 28”
Spindle
Spindle Motor 35 HP + 2 speed gearbox
Spindle nose A2-11
Spindle RPM 20-2800 (12” Chuck)
Hole through spindle 4.52″
Bar Capacity 4.015”
Spindle bearing diameter 6.3″
Spindle inside taper M.T. 7
Hydraulic chuck 12” 3-Jaw
Turret (standard)
Turret tool positions 12
Turret type Hydraculic cam index / hydraulic clamp
Tool mounting Block type
O.D. tool shank size 1.25”
I.D. tool shank size 2.0”
Index time 0.6 seconds next tool / 2 secs 180 degrees
Tailstock
Quill diameter of tailstock 3.35″
Quill stroke of tailstock 3.94″
Quill taper of tailstock M.T. 5
Tailstock body travel 20.1”
Ballscrews and axis motors
Z axis ballscrew diamete 50mm (2”) x 12 pitch
X axis ballscrew diameter 40mm (1.57”) x 10 pitch
Ballscrew type Class 3 double nut pre-loaded
Ballscrew mounting type Pre-tensioned
X-Z servo motor HP X 5.2HP, Z 5.2 HP
Feeds
Rapid Traverse Rate X,Z 590, 708 IPM
Cutting feed rate 0.01 – 315 IPM
Positioning accuracy +/- .0002″ full stroke
Repeatability +/- .0001″
MACHINE SPECIFICATIONS
General
Coolant tank capacity 65 gallons
Coolant pump motor 1.7HP
Machine Weight 16,000 LBS
Floor Space 170″ X 91″ x 88″
Machine Power Source 208/220 Volts, 3 Phase 125 Amps**
Hydraulic pump motor 3HP
Standard Machine Accessories
Complete coolant system
Splash guards
Built-in work light
Soft jaws
Workpiece counter
1 set of Instruction manuals
Chip conveyor
3 color operation light
Spindle orientation
Hydraulic, programmable tailstock body and quill
CONTROL SPECIFICATIONS
Standard Control Specifications – Fanuc OiT-F Plus Conversational Control
10.4” color high resolution LCD
Manual Guide i Conversational Programming
Alpha i AC digital servo and spindle systems with 1,000,000 pulse encoders
2 Megabyte RAM program memory
Full MDI keyboard
PCMCIA card slot on front panel
USB port on front panel
Data Card Editing Function
Ethernet connection (embedded)
Graphics function (3D)
Up to 5 axis control
Constant surface speed
X axis radius/diameter programming
Decimal point input
Manual feedrate override (0-200%)
Optional block skip
Auto acceleration/deceleration
G70-G76, G90,G92,G94 canned cycles for turning, drilling, threading and grooving
Tool geometry/wear offsets 64 pairs
Tool nose radius compensation (G40-G42)
Tool life management
Work Coordinate System Offsets (G52-G59)
Polar Coordinates
Chamfering / Corner rounding
Custom Macro B
Additional Macro Common Variables #100 – #199, #500 – #999
Canned Cycles
Multiple Repetitive Cycle
Multiple Repetitive Cycle II
Canned Cycles for Drilling
Backlash compensation
Spindle speed override (50-150%)
Machine lock
M,S,T function lock
Dry Run
Single block
Rapid Traverse Override (0-100%)
1000 registerable programs
RS232-C
Skip signal and high speed skip signal
Background editing
Run Hour and parts count display
Fanuc OiT-F Plus Conversational Specifications (Standard)
Fanuc Manual Guide i Conversational with 10.4” color LCD
Accommodates both simple and highly sophisticated machining programs
All operations from programming to execution can be done on screen
Real and high-speed Animated Drawing function for easy program check
Can support subspindle programming
Can support C axis and live tool programming
Full prompt through menu driven and graphical programming
The Johnford SL-500A is a heavy duty, high precision CNC turning center cast from Meehanite iron. In fact, it is the heaviest machine built machine on the market today! Full advantage of the 35HP spindle motor and 2 speed gear box is taken by the rigid slant bed design. Built in classic style, the true 45 degree slant bed is a torque tube design. The torque tube, or hole cast through the center of the slant bed, provides an extremely rigid bed and excellent heat dissipation. The square box ways provide the rigidity for heavy duty turning. Hand scraped Turcite – B applied to all mating sliding surfaces ensures high rapid traverse rates and accurate positioning. To ensure precision and thermal stability the headstock, tailstock, and saddle are all mounted on the same plane at a 45 degree angle. The coolant tank is separate from the machine base to prevent heat transfer from the coolant to the machine casting which ensures precision and promotes easy clean out and maintenance. To further ensure accuracy and precision, the ballscrews are double nut type and pretensioned to eliminate thermal growth.
The precision spindle structure is mounted using precision double row roller bearings in conjunction with angular contact ball bearings for high rigidity and accuracy. The spindle quill inner and outer linings are precision ground for fit with the spindle, thus ensuring extreme concentricity and accuracy. The spindle is driven by a 35HP high torque motor which provides plenty of power. For applications requiring high torque at low RPM’s, a two speed gear box is standard.
A massive 12 station hydraulic turret with 1.25” square shank / 2” I.D. tooling or optional BMT servo live tool turret provides fast indexing as well as coolant through the tool holders. A full C axis with live tools is available for applications requiring milling operations. An optional true Y axis provides 3 axis milling ability when combined with the C axis option. Our Y axis is a true linear Y axis, perpendicular to the X axis, as opposed to theoretical Y axis on a wedge type machines. Fanuc CNC controllers are standard for industry leading performance and reliability.
