Thomas No. 1198F83: Stirring shaft with floating blades: The two blades that open as the speed rises generate an axial flow in the container, from the top towards the bottom. Particularly recommended for stirring in narrow-neck containers, e.g. flasks.
Thomas No. 1198F84: Stirring shaft with folding blade: The blade that automatically falls into line during rotation generates an axial flow in the container, from the top towards the bottom. Particularly recommended for stirring in narrow-neck containers.
Thomas No. 1198F85: Stirring shaft with fixed blade: It generates an axial flow in the container, from the top towards the bottom. Employment: Use at medium-high speed for whirling light solids, for flocculations, mixing thickening agents, stirring sludge, etc.
Thomas No. 1198F86: Stirring shaft with fixed blade: It generates an axial flow in the container, from the top towards the bottom. Employment: Use at medium-high speed for whirling light solids, for flocculations, mixing thickening agents, stirring sludge, etc.
Thomas No. 1198F87: Stirring shaft with 6-hole paddle: It generates a tangential flow with reduced turbulence and with gentle mixing of the product.
Thomas No. 1198F88: Stirring shaft with turbine blade: It generates a radial flow with suction of the product from the top towards the bottom, with high turbulence and high shearing forces.
Thomas No. 1198F89: Stirring shaft with turbo propeller: It generates an axial flow in the container with suction of the substance from the top towards the bottom with low shearing forces. Limited danger of any contact of the blade with the walls of the product's container.
Thomas No. 1198F90: Stirring shaft with anchor: It generates a tangential flow with high-shearing forces on the ends. The flow generated limits the possibility of sedimentation on the walls of the container.
| Thomas No. | # of Blades | Diam. of Blades (mm) | Diam. of Shaft (mm) | Length of Shaft(mm) | Speed Range | Viscosity Range |
| 1198F83 | 2 | 93 | 7 | 400 | M-H | VL-L |
| 1198F84 | 1 | 60 | 7 | 400 | M-H | VL-L |
| 1198F85 | 1 | 50 | 7 | 400 | M-H | VL-L-M |
| 1198F86 | 3 | 60 | 7 | 400 | M-H | VL-L-M |
| 1198F87 | 1 | 69 | 7 | 450 | L-M | L-M |
| 1198F88 | 10 | 49 | 7 | 450 | M-H | M-H |
| 1198F89 | 3 | 46 | 7 | 450 | M-H | M-H |
| 1198F90 | 2 | 45 | 8 | 450 | L-M | M-H |
Stirring shafts must be chosen bearing in mind the stirrer power, the volume of substances to be stirred and its viscosity. The technical features and the application fields of the stirring shafts are summarized in the following tables:
| Speed Range | rpm |
| Low (L) | < 250 |
| Medium (M) | 250 - 800 |
| High (H) | > 800 |
| Viscosity Range | mPa*s |
| Very Low (VL) | 0 – 100 |
| Low (L) | 100 – 1,000 |
| Medium (M) | 1,000 – 10,000 |
| High (H) | 10,000 – 100,000 |
| Viscosity mPa*s | Substance |
| 1 | Water |
| 5 | Milk |
| 10 | Kerosene |
| 100 | Lubricating oil |
| 1,000 | Castor oil, Glicerine |
| 7,000 | Refined honey |
| 25,000 | Chocolate syrup |
| 50,000 | Ketchup |
| 100,000 | Molasses |