Step 1: Verification of End Machining
Ball screw shafts are asymmetrical by design. Before assembly, verify the following:
The Motor End (BK Fixed Side): Must feature a threaded section for the lock nut and a precision-milled shoulder.
The Tail End (BF Supported Side): Must feature a smooth cylindrical journal and a machined groove for the retaining snap ring.
Pre-Check: Ensure all machined journals are clean, degreased, and free of burrs or surface nicks.
Step 2: Installation of the BK (Fixed) Support Block
The BK block serves as the system anchor. Precise installation is required to eliminate axial play.
1.Seating the Shaft: Slide the BK block onto the motor end of the ball screw until the internal angular contact bearings seat firmly against the machined shoulder.
2.Internal Spacing: Slide the provided metal spacer collar onto the shaft to sit against the inner bearing race.
3.Applying Preload: Thread the precision lock nut onto the shaft. Tighten firmly using a hook spanner wrench. This compression eliminates internal clearance between the dual bearings, establishing the "preload" necessary for zero-backlash operation.
4.Final Locking: Tighten the set screws located on the perimeter of the lock nut. The integrated brass pads will bite into the threads, securing the nut without damaging the shaft.
Step 3: Installation of the BF (Floated) Support Block
The BF block supports radial weight while accommodating thermal expansion.
1.Bearing Assembly: Slide the BF bearing unit onto the tail end of the ball screw.
2.Retaining Ring: Using snap-ring pliers, install the included C-clip into the shaft groove.
3.Floating Principle: Ensure the bearing is not axially clamped inside the housing; it is engineered to "float" laterally within the steel block to prevent shaft buckling during operation.
Step 4: Systematic Alignment and Final Fastening
To prevent binding, the support units must be perfectly aligned with the linear guide rails.
1.Frame Attachment: Mount the BK and BF blocks to the machine base. Tighten the mounting bolts only to "finger-tight."
2.Carriage Integration: Secure the ball screw nut housing (DSG bracket) to the machine's moving carriage.
3.Dynamic Alignment: Manually rotate the ball screw to move the carriage as close to the BK block as possible. The rigidity of the carriage will force the BK block into concentric alignment. Fully torque the BK base bolts.
4.Final Synchronization: Move the carriage to the opposite end (near the BF block). This forces the BF block into alignment. Fully torque the BF base bolts.