Complete the sentences using the wordlist below

Date: 2015-10-07; view: 588.

permit, normal, use, provide, ad­justing, grindings, cutting, tool, interchangeably,

shells, float, to ensure, piloted, rigidly, tailstock

Expansion reamers … a slight expansion by a wedge so that the reamer may be resharpened to its … size or for job shop …; they … slight variations in size. Adjustable reamers have means of … inserted blades so that a definite size can be maintained through numerous … and fully worn blades can be replaced with new ones. Shell reamers constitute the… portion of the … which fits … on arbors to make many sizes available or to make replacement of worn-out … less costly. Reamers … in their hold­ing fixtures … alignment, or they should be … in guide bushings above and below the work. They may also be held … , such as in the … of a lathe.

8. Translate the following sentences into Ukrainian:

1. Replacement chasers are used in die heads and may be of the fixed or self-opening type. 2. Emulsions and oils are satisfactory for most threading operations.

3. The horizontal type is made for both precision work and general man­ufacturing. 4. The machine is universal and has a wide range of speeds and feeds, for a face-mill operation may be followed by one with a small-diameter drill or end mill.

5. Vertical boring mills are adapted to a wide range of faceplate work that can be revolved. 6. The pitch of the teeth, i.e., the distance from one tooth to the next, depends upon tooth strength, length of cut, shape and size of chips, etc. 7. The root should be a smooth curve. 8. A jig-boring machine has a single-spindle sliding head mounted over a table adjustable longitudinally and transversely by lead screws which roughly locate the work under the spindle. 9. Precision setting of the table may be obtained with end measuring rods, or it may depend only on the accuracy of the lead screw. 10. These machines, made in various sizes, are used for accurately finishing holes and surfaces in definite relation to one another. 11. The latter are held in an adjustable boring head by which the tool can be moved eccentrically to change the diameter of the hole. 12. Precision-boring machines may have one or more spindles operating at high speeds for the purpose of boring to accurate dimensions such sur­faces as wrist-pin holes in pistons and connecting-rod bushings.