VERTICAL SPINDLE 31ILLING-M Arm:MS.-31M ing-machines with vertical spindles and travers ing or rotating tables for holding the work have come largely into use within the past few years. They offer many advantages in the range of work of which they are capable, and in the con venience and solidity with which the work is held. They are made in quite a variety of forms by different makers, much originality be ing shown in their design. We illustrate below several forms.
Fig. 6 represents the Brown & Sharpe Verti cal Spindle Miller. This is a conveuient ma , chine for the various operations of milling which can be done with an end or face mill; the work being held upon the platen, and the spindle standing vertically over the same, enables the operator to plainly see or to guide the work, to follow any irregularity of outline of any raised surfaces to be milled. The platen has longi tudinal and transverse movement. The spindle has a hole throughout its length, through which a bolt is passed for holding the arbors. The ad justment of the spindle is made by raising the column, a fine adjustment being obtained by a graduated collar-nut reading to thousandths of an inch. The feed is automatic at will, in either direction, stopping automatically at any required point.
The Hilies& Jones Milling-Machine.—Fig. 7 shows a new design of vertical milling-machme built by Mlles & Jones, of Wilmington, Del. It is adapted for locomotive, engine, and other heavy work. A rallial crane is attached for lift ing heavy pieces. The table is furnished with both rotary and traverse motions.
The Beaman & Smith Milling-Machine.— Fig. S represents a vertical milling-machine built by Beaman & Smith, of Providence. it. I., for surface milling, using face or end cutters from 4 to 1:2 in. in diameter, E. II". Bliss Vertical Milling-Machine, shown in Pig 11, is designed for die-work, as well as for much work of a ac encral charter h d itherto one on planing and shaping ma chines. Circular, longitudinal, and miss feeds are provided. the hitter being automatic, and having four changes of speed. The head which carries the spindle is adjustable as to height, and is counterbalanced. The spindle is suited for operating side, bottom, and facing
putters.
rerfiret/ or Angular Attachment for Milling -MachinPS.—This attachment (Pig. 10) is built for use on the milling-machine mann faetn red by Peel rick & Ayer. It is adapted to the cutting of racks, spur and bevel gears. profiling, or angular milling. etc. It is secured to the head of the milling-umehinc, and is driven by a socket fixed in the spindle, which is key-seated to fit the keyed stud in the attachment. Through the medium of a pair of mitre-wheels this stud drives ii spindle at right angles to the vertical attachment. _Phis spindle is geared with a shaft in line with it, which is utilized as a cutter or saw arbor for cut t big racks. sawing up stock, etc.
Locomotive Cylinder-Port Jfilling-ifachine.--This machine (Fig. 11), built by Beaman & Smith, of Providence, R. I., is designed especially to mill the ports of locomotive cylinders.
It can be readily attached to any standard locomotive cylinder. The frame or bed is fastened to the steam-chest seat, and the uprights are moved on the frame by means of racks and pinions until the milling-cutter is over the ports as desired, and are then fastened. The cross head carrying the spindle-saddle is lowered similar to that of a planer, until the milling-cutter is at the required depth, and then securely fastened to the uprights. The spindle is of steel, and runs in conical Monzp with adjustment to compensate for wear, a i nd is driven by n cone. The feed is automatic in either direction.
Portable Steam-Chest Seat Xilling-Maehine.—Fig. 12 shows a machine built by Pedrick & Ayer, of Philadelphia, adapted to supersede the slow and expensive operation of cutting a groove in the surfaces adjoining the steam-chest seat with hammer, chisel, and file. This machine is also adapted to the drilling either of new holes for studs or the drilling out of old studs when broken off. It is supported and adjusted to the surface to be grooved or milled by four studs, running through two hollow arms, which in turn support the Vs or slide.