III. Language.

Ex.7. Match word and word combinations in column A with those in column B:

А	В
a) втулка b) черв’ячна передача c) крихкі заготовки d) використовувати e) коробка швидкостей f) регулювання g) колона h) храповий важіль i) верстат підвищеної точності j) простий фрезерувальний верстат	1. employ 2. gearbox 3. column 4. adjustment 5. ratchet level 6. plain machine 7. sensitive machine 8. delicate works 9. quill 10. worm gear

Ex.8 Find the right ending of the sentences and translate these sentences:

1. Drilling machine is mainly employed for…

a) providing the necessary feed for the drill;

b) drilling holes of different sizes in metal or any other solid material;

c) producing grinding and milling operations.

2. Besides drilling holes drilling machine may perform such operations as …

a) threading, grinding, milling;

b) turning, finishing surfaces;

c) tapping, reaming, lapping, countersinking and counterboring.

3. In the upright drilling machine the spindle is …

a) in a in a horizontal position;

b) in a vertical position.

4. The upright drilling machine has …

a) a feed shaft with its necessary gearing;

b) an upright column resting on a heavy base;

c) a number of movable drills.

5. The feed mechanism represents …

a) a feed shaft with its necessary gearing;

b) a gearbox providing a wide range of speeds;

c) a sleeve or quill which does not rotate.

6. The machine is also equipped with

a) a hand wheel which is fastened to a worm gear;

b) a ratchet lever for hand feeding the drill;

c) a drilling head mounted on the top of the column.

7. The upright drilling machines are classified as:

a) vertical spindle;

b) multiple-spindle, radical spindle;

c) heavy drilling.

8. The heavy duty drilling machine is used for …

a) drilling small holy;

b) accurate drilling;

c) heavy drilling.

9. The sensitive drilling machine is adapted …

a) for drilling holes in solid material;

b) for drilling holes in delicate works;

c) for drilling holes of different sizes.

Ex.9. Fill in the blanks using the following words.

a) quill; b) simultaneous; c) push-Sutton; d) multiple-spindle; e) reaming; f) mounted.

1. In addition to drilling holes such operations as tapping, …, lapping maybe performed on drilling machines.

2. Drilling machines are divided into various classes,…, radial spindle.

3. In all there types the drill spindle rotates in a … which is free to move axially.

4. Saving considerable time and space this machine is used for… drilling of many holes in a large number of workplaces

5. Fully automatic multiple-spindle drilling machine has a vertical column … on a cast iron base.

6. The radial drilling machine has a vertical column … on a cast iron base.

Ex.10. Put question to get the following answers.

1. Such operation as tapping, reading, lapping, countersinking and counterboring may be performed on the drilling machines.

2. In vertical spindle drilling machines the spindle is in a vertical position.

3. The upright drilling machines are classified as: heavy duty, plain and sensitive.

4. Saving considerable time and space the multiple-spindle drilling machine is used for simultenuous drilling of many holes in a large number of workpiues

5. The radial drilling machine has a vertical column mounted on a cast iron base.