Magnetic induction tachometers 8 ТМ

Manufacturer: PAO SARANSK INSTRUMENT WORKS
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Tachometers 8ТМ (hereinafter– tachometers) are designed to continuously measure the rotation speed of machine and mechanism parts.

Tachometers are connected via a spring-load coupling when rigidly attached to the object or via a flexible shaft when attached to the object by means of shock absorbers.

 8ТМ consists of encased measurement mechanism and drive.

8ТМ with right/left zero are manufactured with left-handed direction of drive shaft rotation; left-hand direction of drive shaft rotation means counterclockwise rotation when viewing the tachometer from the drive side.

Installation, safety measures and maintenance

1. Prior to install a magnetic induction tachometer on-site, make sure that the tachometer shaft rotates freely when turned with a hand.

2. Tachometer is rigidly attached to the object using four screws.

3. It is prohibited to connect the tachometer to a rotating shaft of the object.

4. Conduct repairs upon expiration of the guarantee service life at specialized repair enterprises. Spare parts supply is as per the applicable catalog in case of funds and repair documentation availability upon agreement with manufacturer.

General specifications

Allowable basic error of the tachometer, %, maximum:

  • within the operating measuring range ±1;
  • in the remaining part of the scale (for tachometers with right/left zero – from the upper range limit; for tachometers with center-zero scale – from the sum of upper range limits) ±1.5. – page 85 of the Catalog

Method of tachometer attachment to measurement object:

  • using a spring-loaded coupling with a shank bore diameter – 25 or 40 mm;
  • using a flexible shaft.

Direction of tachometer drive shaft rotation:

  • for tachometers with right/left zero – left- or right-handed (the left-handed rotation of the tachometer drive shaft means counterclockwise rotation, the right-handed rotation – clockwise rotation when viewing the tachometer from the drive shaft side);
  • for tachometers with center-zero scale – two-way.

Tachometer climatic versions:

  • У3 – for operation at a temperature from minus 60 to plus 60°С and relative humidity up to 80%;
  • T3 – for operation at a temperature from minus 10 to plus 55°С and relative humidity up to 80%.

Tachometer weight (with no regard to the flexible shaft) is 1.4 kg as maximum.

Tachometer version

Measuring limits, rpm

Operating measuring range, rpm

Tachometer factor

Scale division value, rpm

Dial diameter, mm

lower range

upper range

With right/left zero

8ТМ 0,1

5-100

30

100

10:1, 15:1,

20:1, 30:1

1

56

8ТМ 0,5

25-500

150

500

2:1, 3:1,

4:1, 6:1

5

56, 89

8ТМ 1

50-1000

300

1000

1:1, 2:1, 3:1

10

56, 89

8ТМ 1,5

75-1500

450

1500

1:1, 2:1

20

56, 89

8ТМ 2

100-2000

600

2000

1:1, 1:2

20

56, 89

8ТМ 3

150-3000

900

3000

1:1, 1:2, 1:3

50

56, 89

8ТМ 4

200-4000

1200

4000

1:1

50

56, 89

With center-zero scale

8ТМ 0,06-0

3-60

20

60

25:1, 50:1

2

89

8ТМ 0,1-0

5-100

30

100

5:1, 10:1, 15:1, 20:1; 30:1

2

56

8ТМ 0,5-0

25-500

150

500

1:1. 2:1, 3:1, 4:1, 6:1

10

56, 89

8ТМ 1-0

50-1000

300

1000

1:2, 1:1, 2:1, 3:1

20

56, 89

8ТМ 1,5-0

75-1500

450

1500

1:3, 1:1, 2:1

50

56, 89

8ТМ 2-0

100-2000

600

2000

1:1, 1:2, 1:4

50

56, 89

8ТМ 3-0

150-3000

900

3000

1:1, 1:2. 1:3, 1:6

100

56, 89


Notes:

Tachometer factor means a ratio of the input rotation speed to the rotation speed indicated by the tachometer.

Ordering

When ordering, it is required to specify the following:

  1. Description
  2. Version
  3. Tachometer factor
  4. Scale type
  5. Shank bore diameter
  6. Method of attachment to measurement object
  7. Location and direction of drive shaft rotation
  8. Flexible shaft length
  9. Climatic version designation
  10. ТУ designation

Example of an order

With an upper range limit of 2,000 rpm, right/left zero scale, dial diameter of 56 mm, factor 1:2, climatic version У3:

 

“Tachometer 8ТМ2.56.1:2.У3 ТУ 25.02.111568-77”

 

idem, with center-zero scale: “Tachometer 8ТМ2-0.56.1:1.У3 ТУ 25.02.111568-77”

With an upper range limit of 2,000 rpm, right/left zero scale, dial diameter of 56 mm, factor 1:2, climatic version Т3 (export version):

 

“Tachometer 8ТМ2.56.1:2.Т3.ТУ25.02.ЭД1.111568-77 – page 86 of the Catalog

Designations

  • П (Л) – right-hand (left-hand) direction of tachometer drive shaft rotation;
  • 1 – flexible shaft;
  • 0 – center-zero scale.

Overall and attachment dimensions 

Тахометры магнитоиндукционные 8 ТМ

Тахометры магнитоиндукционные 8 ТМ