Magnetic induction tachometers 8 ТМ

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.

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.

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