Shaft Modification Options

D-shaft (not Nanotec standard D-Cut "KM-FLAT")

This section details the D-shaft modification, which is distinct from Nanotec's standard D-Cut "KM-FLAT".

Diagram Description: The diagram illustrates a D-shaft with key dimensions labeled: LA (length of flat), hA (height of flat), LB (overall shaft length), and hB (overall shaft height). Tolerances are indicated: LA ±0.25, LB ±0.25, hA ±0.15, hB ±0.15.

Notes:

• ? The first 3 mm of the shaft (measured from the motor) cannot be machined. For motors with a flange size of NEMA 34 and more, the first 4 mm of the shaft (measured from the motor) cannot be machined.
• ? If the shaft is flattened on both ends, the flats are not parallel to each other.
• ? The more economical standard D-shaft from Nanotec can be ordered via the online configurator after selecting a motor. You can find an overview of the dimensions here.

Shorter Motor Shaft

This option allows for the motor shaft to be shortened to a specific length.

Diagram Description: The diagram shows a motor shaft with dimensions LA (original length) and LB (shortened length). Tolerances are indicated as ±t, where 't' represents the specified tolerance of the motor.

Note:

• ? The first 3 mm of the shaft (measured from the motor) cannot be machined. For motors with a flange size of NEMA 34 and more, the first 4 mm of the shaft (measured from the motor) cannot be machined.
• ? t = specified tolerance of the motor (see dimension drawing online).

Thinner Motor Shaft

This service reduces the diameter of the motor shaft.

Diagram Description: The diagram illustrates a thinner motor shaft. Key dimensions include L (length) and d (diameter). Tolerances are specified as L ±0.5 and Ød ±0.02. Additional specifications shown are R < 0.5 and Ød.

Notes:

• ? A motor with two shaft ends (B shaft) is necessary for this subsequent machining of a shaft.
• ? After machining, the B shaft can also be shortened. In this case, please enter the desired length (LB) under “Shorter motor shaft.”
• ? The first 3 mm of the shaft (measured from the motor) cannot be machined. For motors with a flange size of NEMA 34 and more, the first 4 mm of the shaft (measured from the motor) cannot be machined.

Cross Bore

This option adds a cross bore to the motor shaft.

Diagram Description: The diagram shows a shaft with a cross bore. Key dimensions are L (length) and d (diameter of the bore). Tolerances are indicated as L ±0.25 and Ød ±0.05. A top view shows the bore diameter and the position relative to the shaft center and motor flange.

Note:

• ? Holes can only be drilled in 0.1 mm increments.
• ? You can find the minimum distance from the center point of the bore to the shaft end and the motor flange in the table above.

Keyway

This modification adds a keyway to the motor shaft, typically for securing components.

Diagram Description: The diagram shows a shaft with a keyway. Key dimensions include L (length), l (keyway length), ØD (shaft diameter), and t1 (keyway depth). A tolerance is shown for L (L ±0.25). A cross-section and face view illustrate the keyway's geometry.

Keyway Specification: Keyway is manufactured according to DIN 6885-A, tight seating (P9). The size of the keyway depends on the shaft diameter:

• 6.35 mm shaft diameter: 2x2xl
• 8 mm shaft diameter: 2x2xl
• 14 mm shaft diameter: 5x5xl

Notes:

• ? All dimensions and tolerances are determined by the shaft end.
• ? The first 3 mm of the shaft (measured from the motor) cannot be machined. For motors with a flange size of NEMA 34 and more, the first 4 mm of the shaft (measured from the motor) cannot be machined.
• ? The more economical standard D-Cut from Nanotec can be ordered via the online configurator after selecting a motor. You can find an overview of the dimensions here.