New JOHNFORD BMC-130 | Horizontal Table Type Boring Mills

Description

The Johnford BMC-130 is the heaviest horizontal boring mill in its class. With standard accessories, this heavy duty 50 HP horizontal boring mill, weighs in at over 88,000 lbs. of Meehanite cast iron. The machine design features a moving column for the Z axis and a moving table for the X axis only. This design, which is superior to a moving table / fixed column design, allows for maximum rigidity, better accuracy, and full support of the table over the complete X axis travel. The moving column design eliminates the need for outriggers or outboard supportive ways to support high table loads. The X axis is fully support by the base with absolutely no overhang of the table. The machine features precision ground and induction hardened box ways in Y and Z and Schneeberger roller linear ways in X. All box way mating surfaces are coated with Turcite-B and hand scraped for fit. The ways are force lubricated via a pressurized automatic oil lubrication system. Accurate positioning is carried out by large diameter, pre-tensioned ballscrews and powerful servo motors. Accuracy is ensured by the standard linear scales in all linear axes. The X axis ballscrew is fixed screw / rotating ball nut design to prevent ballscrew whip and vibration and increase rigidity and accuracy.

The 130mm (5.12”) quill is made from chrome-moly steel alloy. The spindle and sleeve are nitride hardened and then ground and lapped for high precision performance. The spindle is supported with the highest class of precision bearings to ensure optimum accuracy and to provide a stable platform for heavy duty cutting. The 50HP main motor with 2 speed gear drive ensures outstanding cutting performance at any spindle speed. The spindle delivers a maximum speed of 2500 RPM and the spindle and headstock are oil cooled for minimal thermal growth.

An impressive list of standard features includes a heavy duty 60 tool arm type ATC that is stand alone and separated from the machine for easy maintenance, a chip removal system consisting of a screw type conveyor between the table and column that discharges into a caterpillar type conveyor on the left side of the machine, a high volume coolant system, tall type table guards to contain chips and coolant, a full B axis rotary table, linear scales, and 300 PSI coolant through the spindle. The Fanuc OiM-F Plus control is standard and provides the ideal combination for all types of general machining applications as well as options for high speed, high accuracy mold and die machining. Manual Guide i conversational programming is standard. The optional Fanuc 31iM-B Plus control is available for demanding application in which additional axes are required. Both controls feature the Fanuc Alpha I servo system with 1,000,000 pulse encoders.