Text 8 grinding machines

There are following types of grinding machines: standard universal as well as plain cylindrical grinders for work sizes up to 1500 mm; centreless grinding machines for work sizes from 3 to 150 mm; copy-grinders, tool-sharping machines, etc.

Brief specifications of some cylindrical grinder models are given below.

Vertical drilling machine, model 2170

	Model designation
	3150	3153M	3164	3172	3174	ХIII-94
Maximum workplace diameter, mm Distance between centres, mm Weight of machine, t	100 300 1.1	130 500 2.1	400 2000 10	560 4000 30	800 5000 40	1500 7500 80

Text 9 gear shaper model 5m14

The model 5M14 Gear Shaper is designed for cutting external and internal spur gears.

Model 5M14 gear shapers are extensively used in the automobile, tractor, and machine-tool industries, especially for gears with teeth up close to a shoulder and with only a slight clearance recess, as well as for other industries in which the cutting of spur gear is required.

CERTIFICATE

Manufacturing Works

Model 5M14

Work's serial No.____________,

years of manufacture ___________

Purpose — for cutting spur gears

Overall dimensions:

Floor space, mm 1800x1350

Height, mm 2200

Net weight, kg 3450

SPECIFICATIONS

Capacity

Maximum diameter of gears accommodated, mm 500

Maximum face width of gears cut, mm 105

Maximum module of gears cut (for steel), mm 6

Stroke of cutter spindle, mm:

maximum 125

minimum 0

Maximum outside diameter of internal gears accommodated, mm 550

Minimum pitch diameter of cutter, mm 100

Maximum automatic withdrawal of cutter at the end of operating cycle,

mm 18

Distance from work-spindle flange to cutter locating surface, mm:

maximum 170

minimum 45

Saddle maximum travel, mm 500

Saddle travel per revolution of the crank handle, mm 3

Saddle travel dial divisions, mm 0.02

Scale with index for setting up and checking the cutter-spindle stroke available

Work-table fast-rotation for truing the work available

Work clamping manual

Maximum work withdrawal from cutter during return stroke (relieving

motion), mm 0.5

Main drive mechanism

Speed step	Setting up main drive mechanism				Stepped speed variation
	Lever position	Cutter strokes per minute	Available power on cutter spindle, kW		Weakest link in main drive gear train
			at rated power of drive motor	permitted by weakest link
0		Neutral
1		125
2		179
3		265
4		400

Feed mechanism

Rotary feeds

Levers for setting the rotary feed mechanism: 1, 3 – engaged; 2 – disengaged; 4 – reversing lever; 5 – square shank for rotating cutter and blank by hand	Feed step	Change gear notation		Number of cutter strokes per cutter revolution	Rotary feed, mm, per cutter revolution along pitch circle of 100 mm cutter
		a — driver gear b — driven gear
		Number of teeth
		a	b
	1	58	31	628	0.51
	2	55	34	729	0.44
	3	50	39	897	0.35
	4	47	42	1028	0.3
	5	42	47	1287	0.24
	6	39	50	1475	0.21
	7	34	55	1850	0.17

Setting-up formula

with a cutter diameter d_c = 100 mm the formula will be 3.66×S

S – rotary feed

especially for gears with teeth up close to a shoulder and with only a slight clearance recess – особенно при нарезке закрытых венцов и тонких зазоров выемок