skf.com-094448879886578a-TKBA Belt alignment tools range
COMPARISON TABLE
Designation TKBA 11 TKBA 21 TKBA 31 TKBA 40
Transmitter/emitter unit
Type of laser Red laser diode Red laser diode Green laser diode Red laser diode
Laser 1x Built-in class 2 laser, <1mW, 635nm 1x Built-in class 2 laser, <1mW, 635nm 1x Built-in class 2 laser, <1mW, 520nm 1 × Built-in class 2 laser, <1 mW, 632 nm
Laser line length 2.4 m at 2 m
(7.9 ft at 6.6 ft)		 2.4 m at 2 m
(7.9 ft at 6.6 ft)		 2.4 m at 2 m
(7.9 ft at 6.6 ft)		 3 m at 2 m
(9.8 ft at 6.6 ft)
Measurement accuracy angular Better than 0.02° at 2 m (6.6 ft) Better than 0.02° at 2 m (6.6 ft) Better than 0.02° at 2 m (6.6 ft) Better than 0,2°
Measurement accuracy offset Better than 0.5 mm (1/50″ in.) Better than 0.5 mm (1/50″ in.) Better than 0.5 mm (1/50″ in.) Better than 0,5 mm (0.02 in.)
Measurement distance 50 mm to 3 m
(2 in to 10 ft)		 50 mm to 3 m
(2 in to 10 ft)		 50 mm to 6 m
(2 in to 20 ft)		 50 mm to 6 000 mm
(2 in. to 20 ft)
Control Laser ON/OFF Laser ON/OFF Laser ON/OFF Laser on/off switch
Housing material ABS + 2K and Aluminium base powder coat finish ABS + 2K and Aluminium base powder coat finish ABS + 2K and Aluminium base powder coat finish Extruded aluminium
Receiver unit 
Housing material Passive targets: ABS Same as transmitter unit Same as transmitter unit  Aluminium
Passive targets: ABS
Fixtures 
Mounting Magnetic, side mounted Magnetic, side mounted Magnetic, side mounted Magnetic, groove mounted (optional side adapter TMEB A2)
V-guides N/A N/A N/A Size 1: 22 mm, short rods (3× pairs)
Size 2: 22 mm, long rods (3× pairs)
Size 3: 40 mm, short rods (3× pairs)
Size 4: 40 mm, long rods (3× pairs)
Battery 3 x AAA Alkaline type IEC LR03 3 x AAA Alkaline type IEC LR03 3 x AAA Alkaline type IEC LR03 2× AAA Alkaline type IEC LR03
Operation time 32 hours (continuous operation) 32 hours (continuous operation) 6 hours (continuous operation) 20 hours (continuous operation)
Operating requirements 
Operating temperature 0 to 40 °C
(32 to 104 °F)		 0 to 40 °C
(32 to 104 °F)		 0 to 40 °C
(32 to 104 °F)		 0 to 40 °C
(32 to 104 °F)
Storage temperature – 20 to 60 °C
(-4 to 140 °F)		 – 20 to 60 °C
(-4 to 140 °F)		 – 20 to 60 °C
(-4 to 140 °F)		 –20 to +65 °C
–4 to +150 °F)
Relative humidity 10 to 90% RH non-condensing 10 to 90% RH non-condensing 10 to 90% RH non-condensing 10 to 90% RH non-condensing
IP rating IP 40 IP 40 IP 40 IP 40
Calibration certificate – – – Valid for two years
Dimensions
Transmitter/emitter unit 98 x 97 x 52 mm
(3.86 x 3.82 x 2.05 in.)		 98 x 97 x 52 mm
(3.86 x 3.82 x 2.05 in.)		 98 x 97 x 52 mm
(3.86 x 3.82 x 2.05 in.)		 70 × 74 × 61 mm
(2.8 × 2.9 × 2.4 in.)
Receiver unit Passive targets: 40 x 25 mm
(1.57 x 0.98 in.)		 Same as transmitter unit Same as transmitter unit 96 × 74 × 61 mm
(3.8 × 2.9 × 2.4 in.)
Passive targets: 40 x 25 mm
(1.57 × 0.98 in.)
Carrying case dimensions 260 × 85 × 180 mm
(10.2 x 3.3 x 7.1 in.)		 360 x 110 x 260 mm
(14.2 x 4.3 x 10.2 in.)		 360 x 110 x 260 mm
(14.2 x 4.3 x 10.2 in.)		 260 × 85 × 180 mm
(10.2 × 3.3 × 7.1 in.)
Weight
Transmitter/emitter unit 250 g (0.55 lb) with batteries 250 g (0.55 lb) with batteries 250 g (0.55 lb) with batteries 320 g (0.7 lb)
Receiver unit 35 g (0.08 lb) 3 pcs passive targets Same as transmitter unit Same as transmitter unit 270 g (0.6 lb)
Total (incl. case) 0.84 kg (1.85 lb) 1.62 kg (3.57 lb) 1.88 kg (4.14 lb) 1,2 kg (2.7 lb)
Case contents 1 x TKBA 11 transmitter unit 2 x TKBA 21 transmitter /receiver unit 2 x TKBA 31 transmitter/receiver unit 1 x TKBA 40 transmitter unit
3 x TKBA TARGET passive targets 6 x AAA batteries 3 x TKBA TARGET passive targets 1 x TKBA 40 receiver unit
3 x AAA batteries 1 x Printed Instructions for use 6 x AAA batteries 2 x AA batteries
1 x Printed Instructions for use 3 x Belt tension checkers of different loads 4 x sizes of V-guides, 3 × of each size
1 x Pulley groove profile checker 1 x Printed instructions for use
1 x Printed Instructions for use 1 x Calibration certificate