Speaking

Exercise 7. Answer the questions:

1) What does a drill press consist of?

2) How is the size of a drill press measured?

3) What are the advantages of a drill press?

4) How is speed change achieved?

5) What for are drill presses used?

6) What is a geared head drill press?

7) What is a radial arm drill press?

8) What are mill drills?

Exercise 8 . Read the text one more, define the main features of a geared head drill press, a radial arm drill pres and a mill drill (work in pairs).

Exercise 9. Write your own composition on the topic “Drilling Machines”, retell it then orally.

Section II. Lathe

Grammar: Infinitive.

Speaking: Lathe.

Lathe

Study vocabulary:

lathe [leið] – токарный станок circular cross-section ['sә:kjula] – круглое поперечное сечение surface ['sə:fis] – поверхность stationary – неподвижный, стационарный sideways ['saidweiz] – в сторону to enable – давать возможность knurling – накатка; насечка

variety [va'raiəti] – разнообразие, разновидность depth [depӨ] – глубина headstock ['hedstok] – передняя бабка spindle [spindl] – шпиндель chuck – зажим, патрон faceplate – планшайба lathe bed – станина станка tolerance – допуск

Exercise 1 . Read the following words and wordcombinations, give the Russian equivalents, remember them:

bed; headstock; tailstock; carriage; thread cutting mechanism; feeding mechanism; casting; support; align; slide; locate; carry; bearing; obtain; shaft; hollow; bore; taper; insert; thread; nose; move; graduate; measure; contain; either.....or; both.....and; apron; engage; saddle; ways.

Exercise 2 . Read the attributive groups, translate them into Russian:

thread cutting mechanism; feeding mechanism; gearing mechanism; sliding elements; live centre; dead centre; taper bore; hollow shaft; spindle speeds; face plate; left hand side; right hand side; at any point; to any point; to provide the bearing; outer end; to be of hollow construction; to be locked; feed rod; lead screw; cross slide; tool holder; thread cutting; change gears; gear box.

A lathe from 1911 showing component parts.
a = bed, b = toolrest, c = headstock, d = gear train to drive automatic screw shaft, e = pullies for belt drive from an external power source, f = spindle, g = tailstock. h = automatic screw shaft.

Lathe

Text: Lathe

Read and the text, write out the sentences with the Infinitive, translate them.

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