A cross slide is provided to the tailstock, and upon this slide the head of the tailstock is pivoted so as to bore taper holes; the tailstock thus virtually becomes a compound slide rest.
This device may be placed nearer to the end of B, since the wedge may pass through the front leg of the tailstock instead of to the right of it, as in Fig.
The tailstock or poppet-head screw is a right hand because the nut moves in this case.
The third method is by the swing or height of centres and by the greatest length of work that can be held between the lathe centres, which is equal to the length of the bed less the lengths of the head and tailstock together.
N spans the shears beneath the two [V]s on which the tailstock slides.
In flat shear lathes the tailstock is fitted between the inside edges of the two shears, and the alignment of the tailstock depends upon maintaining a proper fit notwithstanding the wear that will naturally take place in time.
To determine how much the tailstock of a lathe must be set over to turn a given taper, the construction shown in Fig.
This tool, when in use, is inserted in the tailstock spindle in place of the regular center.
When the center projects too far, the tailstock cannot be set close to the work owing to the necessity of withdrawing the center when removing the spun part.
The hand wheel of the tailstock has been discarded for the lever A, which is more rapid and can be manipulated without stopping the lathe.
Another View showing the Position of the Spinner and the Way the Tool is held when forming the Metal] Construction of the Tailstock and Back-center Fig.
When using the first method the tap must be placed with the point toward the headstock, the shank end being supported by the tailstock center.
When a reamer is used in the lathe, the outer end is supported by the tailstock center and should have a deep center-hole.
Scales are provided on some tailstocks for measuring the amount of this adjustment; if there is no scale, draw a line across the movable and stationary parts A and B, when the tailstock is set for straight turning.
If the work is quite heavy, it can be held against the chuck, before the jaws are tightened, by inserting a piece of wood between it and the tailstock center; the latter is then run out far enough to force the work back.
The work is then removed and the tailstock is shifted along the bed until the distance a--b between the extreme points of the centers is exactly 1 foot.
Obtaining Tailstock Center Adjustment by use of Square] If these various operations are carefully performed, a fairly accurate taper can be produced.
The pitch of a taper thread that is cut with the tailstock set over will also be slightly finer than the pitch for which the lathe is geared.
The slide can be turned more evenly by using the tailstock center to force it around.
These reamers are held while in use in a socket inserted in the tailstock spindle, as when using a twist drill.
The tailstock center h1, after being oiled, should be set up just tight enough to eliminate all play, without interfering with a free rotary movement of the work.
It will be noted that the drill is held in a chuck, the taper shank of which fits into the tailstock spindle, this being the method of holding small drills.
This is done by turning handle n, and when the center is properly adjusted, the tailstock spindle containing the center is locked by tightening handle p.
A brass plate, with holes to fit the spur center, is fastened in the center of the block, on one end, and the other is centered for the cup of the tailstock screw.
More than one hole is provided in the back edge of the board, so that the tailstock bracket can occupy the right position for the sander or planer head, as the case may be.
The same procedure is carried out in the construction of the tailstock bearings.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "tailstock" in a variety of sentences. We hope that you will now be able to make sentences using this word.
