Seventeen models of traverse units are available with axial thrust ranging from 5 Kg to 280 Kg and suitable for shaft dia 10mm to 80mm. Traverse units are available in two designs. Type 1 : With Three Rolling Rings and Type 2: with  four Rolling Rings.

Type 1) Traverse Unit With Three Rolling Rings:
Models Available  
1) HT 1   (shaft Ø10mm),
2) HT 2   (shaft Ø15mm),
3) HT 3   (shaft Ø20mm),
4  HT 22 (shaft Ø22mm),
5) HT 3N (shaft Ø30mm),
6) HT 4   (shaft Ø40mm),
7) HT 5   (shaft Ø50mm),
8) HT 6   (shaft Ø60mm),
9) HT 8   (shaft Ø80mm)

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Type 2 ) Traverse Unit With Four Rolling Rings:
Models Available  
1) 4RR 15 (Shaft dia 15mm)
2) 4RR 20 (Shaft dia 20mm)
3) 4RR 22 (Shaft dia 22mm)
4) 4RR 30 (Shaft dia 30mm)
5) 4RR 40 (Shaft dia 40mm)
6) 4RR 50 (Shaft dia 50mm)
7) 4RR 60 (shaft dia 60mm)
8) 4RR 80 (Shaft dia 80mm)

Traverse unit with four Rolling Rings are heavy-duty models. The extra Rolling Ring increases the axial thrust capacity by 100 %.
There is no significant changes in outside dimensions for models from 40 mm dia shaft and above. The dimensional change mainly in length for models suitable for 30 mm dia shaft and below (4RR 15, 4RR 20, 4RR 22, 4RR 30.) is minimum.
Traverse unit with four Rolling Rings enable the use of a smaller dia shaft for application having high thrust requirements, saving in cost and also where only limited space is available.