| Designations | TKSA 51 | 
| Sensors and communication | 20 mm (0.8 in.) PSD with line laser Class 2 
 | 
| Inclinometer ±0.1°; Bluetooth 4.0 LE | 
| System measuring distance | 0,07 to 5 m (0.23 to 16.4 ft) | 
| Measuring errors | <1% ±10 µm | 
| Housing material | Anodized Aluminum front and PC/ABS plastic back cover | 
| Operating time | Up to 8 hours, rechargeable Li-ion battery fast charging: 10 min. charging for 1h usage | 
| Dimensions | 52 × 64 × 50 mm (2.1 × 2.5 × 2 in.) | 
| Weight | 190 g (0.4 lb) | 
| Operating device | Samsung Galaxy Tab Active 2 and iPad Mini recommended 
 | 
| iPad, iPod Touch | 
| iPhone SE, Galaxy S6 or above (all not included) | 
| Software/App update | Apple AppStore or on Google Play Store | 
| Operating system requirements | Apple iOS 9 or Android 9 (and above) | 
| Alignment method | Alignment of horizontal and vertical shafts, 3 position 
measurement 9 -12 -3, automatic measurement, measurement (with min. 40° 
rotation), soft foot | 
| Live correction values | Vertical and horizontal | 
| Extra features | Machine library | 
| QR code reading | 
| Target values | 
| Disturbance compensation | 
| 3D machine free view | 
| Screen rotation on tablets | 
| Automatic PDF report | 
| Fixture | 2 × V-brackets with chains, width 15 mm (0.6 in.) | 
| Shaft diameters | 20 to 150 mm (0.8 to 5.9 in.) 
 | 
| 450 mm (17.7 in.) with extension chains (included) | 
| Max. coupling height * | 45 mm (1.8 in.) with standard rods plus 170 mm (6.7 in.) per set of extension rods | 
| Power adapter | Charging via micro USB port (5V) | 
| Micro USB to USB split charging cable supplied | 
| Compatible with 5V USB chargers (not included) | 
| Operating temperature | 0 to 45 °C (32 to 113 °F) | 
| IP rating | IP 54 | 
| Carrying case dimensions | 355 × 250 × 110 mm (14 × 9.8 × 4.3 in.) | 
| Total weight (incl. case) | 2,9 kg (6.4 lb) | 
| Calibration certificate | Supplied with 2 years validity | 
| Case content | 2 measuring units (M&S) | 
| 2 shaft brackets with chains 480 mm (18.9 in.), threaded rods 80 mm (3.2 in.) and magnets | 
| 4 threaded extension rods 120 mm (4.7 in.) | 
| 2 extension chains 980 mm (38.6 in.) | 
| Micro USB to USB split charging cable | 
| Measuring tape | 
| Printed certificate of calibration and conformance | 
| Quick start guide (EN) | 
| 2x A5 sheets with 6x QR code stickers per sheet (total of 12x stickers) | 
| SKF carrying case | 
| * Depending on the coupling, the brackets can be mounted on the coupling, reducing the coupling height limitation. |