Universal Vertical Boring-liachine.—What is known as a universal vertical boring-ma chine. Fig. 2, is in some sense a misnomer, although it is a very useful tool. It is intended to bore both vertical holes and those which are inclined in a vertical plane. In one of the best forms, made by the Berry & Orton Co., there are three boring spindles, each of which has a movement of 24 in. back and forth in a horizontal plane and one in a vertical one of 18 in., and which can be set at an angle of 45° or less with the vertical. Each spindle, or any com bination of two or of three, can be moved at once back and forth across the table by a hand wheel in front of the horizontal bracket which carries them, and which is borne by a vertical clamp back of the table. Each of the boring spindles has a quick return, and is advanced to the work by a counterbalanced lever, The table to which the work is attached is made of glued-up strips of wood, veneered top and bottom with hard Southern pine. and may be of any desired length. It has on its edge a number of stops for duplicating work without the expense of laying out t and on the top a system of holsters and clamps that take in 24 in. in width, to receive and fasten the timber that is to be bored. The table is mounted on a system of rolls 1: in. in diameter. and about G ft. apart. borne on uprights fastened to the floor. The motion of the table is by hand or power. through a feed-stand and shifting bar ; the rate of feed by power being about 200 ft. per minute.
An Eight-Spindle Vertical Gang Boring-Machine, made by Fay & Co.. of Cincinnati, has largely revolutionized the system of boring in ear-shops. Originally in boring truck timbers it was necessary, where there were eight holes to be bored through a timber at one operation, to put it on a machine that would bore only three to four holes at a time, and as the timbers were about 14 in. thick, the holes could only be bored straight through by first boring half through the timber from one side, then reversing the stick and boring holes from the opposite side, to meet the others. The eight-spindle machine, which has an autotnatically raising table, enables the operator to bore the holes entirely through a timber of this thickness in a perfectly straight line. The operators place a stick upon the table and bore the necessary holes all at one time, thus effecting a great saving in handling the timber and in the time taken up.
The multiple gang boring-machine, designed for the special work of boring a large number of holes at one operation without the necessity of laying them out, has a table, back of which there are ranged eight arbors. each carrying a boring tool. These spindles run in frames, which arc gibbed to a connected gateway, and are vertically adjustable by a screw to each. The arbors have lateral adjustment also. Beneath the table and parallel with its length there is a horizontal drain, mid the belt which drives all the boring-arbors runs from this over one driven pulley, then down under the drum, up over• the 51212011d driven spindle, and so on until it has passed over all the pulleys : then it passes back lengthwise of the table by guide pulleys, so that there is but one belt to be laced, and no difficulty as in maintaining eight separate belt tensions. The spindles being set at the proper distance apart and at the
proper heights, no adjustment is necessary. Eccentric clamps on the table hold the work. The table has lengthwise traverse on V-slides by a hand-lever.
The Bente! and Margedant Rake-/lead Boring and Routing Machine has 20 spindles, which can be tuljusted laterally to the required distance apart. The work is clamped to the table by four eccentric clamps. the handles of which are in the front of table, standing, straight up, These clamp the work against a, fence, which is bolted to the top of the table by T-slots. The face of this fence is lined with wood, so as to protect the points of the bits when cutting throng,h.
The table is balanced. mid has a continuous vertical reciprocating motion given by a crank and double levers iu front of the machiue. The crank has an adjustable throw to vary the length of mortise. and is driven by means of the pulley shown zit the extreme right of the machine. The connecting rod also has an adjustment to bring the mortises into any position on the stick. The feed is operated by means of double lever and two vertical rods. These rods connect with two right and left ratchet-pawls, thus producing a continuous feed, which may be varied to suit the requirements of the work. The table is fed in by racks and pinions, and is geared at four points to get a parallel movement.
In operation, the work is clamped to the table, which keeps up its vertical reciprocating movement, and is not stopped to place the work. The feed is then thrown in by lifting a hand-wheel in front ; this engages a worm and gear which feed the table forward automat ically, until it has traveled in against an adjustable stop, when the feed is tripped off and the table returns automatically by means of a weight, and is ready for another piece. The machine is claimed to make 1,200 mortises 11 in. long through I in. hard wood in an hour, leaving the mortise smooth and free from chips. It can be arranged for making a tapering mortise or to mortise lengthwise of the material. The makers state that it has mortised 150.000 holes through 3-in. sugar• lumber without breaking a bit. For use as a multiple boring-machine. augers are substituted for the routing bits; the feed-belt at the right is stopped, and the one at the left which drives the cone is started, and the work clamped to the table, the same as for routing. The table is fell forward by pressing a foot-treadle ; this is accomplished by a pair of driven friction-rolls, winch grasp the slack belt which is wound around a pulley in front. When the pressure is removed, the tattle returns by means of the weight formerly described, which comes below the door. The machine, when once adjusted for• any par ticular piece, will turn Out any number, all alike, without laying off.
Boxing Mac hi ne see Wheel Making Machines.
Box Tool ; see Screw Machines.