Super Turning Center Tackles Big Parts, Heavy Duty Turning Perfect for the Oil and Gas Industry

· Big lathe tackles large parts and heavy duty cutting

· Great workhorse for oil-field, energy, and construction equipment industries

· 35 HP spindle and 4-speed gearbox deliver high torque at low RPM

· One-piece, 45° slant bed design provides the rigidity for heavy turning and unparalleled ergonomics

· Torque tube design delivers high rigidity and heat dissipation

Lorain, Ohio - The Johnford SL-800B is a heavy duty, high precision CNC turning center built for industries such as oil-field, energy, and construction equipment - industries that need large lathes for big parts. Absolute Machine Tools, Inc. offers this massive (33,000 lb) 45 degree slant bed machine.

The Johnford SL-800B is a heavy duty, high precision CNC turning center cast from Meehanite iron. The rigid 45° slant bed can easily sustain the standard 35HP spindle motor and 4 speed gear box because the bed is made with a torque tube, or hole, cast through the center of the slant bed providing an extremely rigid bed and excellent heat dissipation. Heavy square box ways provide the necessary rigidity for turning large diameter parts. 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° 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 four speed gear box is standard.

A 12 station bi-directional hydraulic turret or optional BMT servo live turret provides .5 second indexing as well as coolant through the tool holders. A full C axis with live tools is available for applications requiring milling operations.


Swing over bed 27.55"
Standard Turning Diameter 21.25"
Swing Over Carriage 21.25"
Maximum Cross Travel (X Axis) 13.8"
Maximum Longitudinal Travel (Z Axis) 78.7"
Distance Between Centers 85"

Spindle Motor 35 HP (50 HP optional)
Spindle Nose A2-11
Spindle RPM 20 - 2,000 (15" chuck)
Hole Through Spindle 5.2"
Bar Capacity 4.6"
Hydraulic Chuck 15", 3-jaw

Rapid Traverse Rate X, Z 472, 590 IPM
Cutting Feed Rate 0.01 - 315 IPM max.
Positioning Accuracy +/- 0.0002" full stroke
Repeatability +/- 0.0001"

About Absolute Machine Tools, Inc.

Absolute Machine Tools, Inc. provides advanced metalworking solutions and comprehensive services for production machining, mold/die machining, and production turning. A leading importer and distributor of high-performance CNC machining and turning equipment, the company helps machine shops and manufacturing facilities improve their production processes to be more competitive in a tough global environment.

Products and Services

Absolute Machine Tools works with its partners to offer the most rugged, accurate, and productive machine tools in the industry. It also supplies a diverse range of previously owned equipment. The company has built its reputation on unsurpassed applications-engineering service and support, comprehensive training, and innovative preventive-maintenance programs. In addition to its three regional offices, a nationwide network of regional distributors is in place to help North American manufacturers with their toughest production challenges.

Absolute's partners include:

· Roundtop (Johnford) Machinery - OEM of heavily-constructed and highly productive Johnford machining and turning centers and large boring mills

· Tongtai - (former manufacturer of Hitachi-Seiki CNCs) OEM of high performance, high productive turning centers, 5-Axis machining centers, and premium horizontal machining centers

· You Ji - OEM of massive custom-built (turn-key style) vertical turning centers

· Quicktech - OEM of multi-axis, multi-spindle, multi-tasking quick turning centers

· AccuteX EDM - OEM of CNC wire EDMs, die sinker EDMs, and hole drilling EDMs

For more about Absolute Machine Tools, its product lines, and services, please visit or call (800) 852-7825.

Media contact:

Courtney Ortner
(440) 960-6911

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