A German CNC machine tool builder reduced assembly time by 35% and eliminated spindle alignment callbacks after switching to Dongfeng's HGR35 P4-grade guideway rails with C1 preload.
Customer Challenge
A precision CNC machine tool builder in Germany required HGR35 linear guideway rails with P4 accuracy class for a new series of 5-axis machining centers. The existing supplier could not maintain consistent preload and running parallelism across production batches, leading to machine assembly delays and field callbacks for spindle alignment issues.
Dongfeng Solution
Dongfeng supplied HGR35 guideway rails in P4 accuracy class with C1 preload, manufactured from GCr15 chrome steel hardened to 58-62 HRC. Each batch included CMM dimensional inspection reports documenting rail parallelism within 5 microns, running smoothness test data, and hardness verification certificates. A dedicated QC checkpoint was set up to verify interchangeability of slide blocks across the full batch.
Results & Valuealue
After switching to Dongfeng's HGR35 guideway rails, the customer reported a 35% reduction in machine assembly time due to consistent preload and drop-in interchangeability. Field callbacks for spindle alignment issues dropped to zero over 12 months. The customer placed repeat orders for 3 consecutive quarters and expanded the scope to include HGR45 rails for larger machine models.els.
Key Specifications
- Product: HGR35 guideway rail + HGH35CA slide block
- Accuracy: P4 grade
- Preload: Class C1
- Rail length: 2000mm
- Material: GCr15, 58-62 HRC
- Batch size: 120 sets
- Certification: CE, SGS