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## Why Specification Matters
A poorly specified servo press RFQ results in quotes that are not comparable, and a press that may not meet your production needs. Use this checklist to write a complete specification.
## Required Specifications
**Tonnage:** State nominal tonnage AND the position at which it is rated. Example: 200T at 6mm above BDC. Some manufacturers rate tonnage at BDC (optimistic) vs. 6mm above BDC (conservative).
**Stroke:** Maximum stroke length in mm. For deep drawing, you need stroke = draw depth x 2.5 minimum.
**Shut height:** Distance from slide bottom to bolster top at BDC. Must accommodate your die height.
**Bolster size:** Length x width in mm. Must be larger than your die footprint.
**SPM range:** Minimum and maximum SPM. State your production target SPM.
**BDC repeatability:** State required value. Typical: 0.01mm for general forming, 0.005mm for precision.
**Motion profile:** State if you need programmable speed profiles, dwell at BDC, pendulum motion.
## Drive and Control Specifications
- Control system brand preference (Siemens, Fanuc, Yaskawa, Mitsubishi)
- Safety category required (typically Category 4 / PLe for press applications)
- Network protocol (PROFINET, EtherNet/IP, EtherCAT)
- Data logging requirements (strokes per shift, tonnage history, fault log)
## Delivery and Support
- Required delivery date
- Installation and commissioning support required
- Spare parts package
- Training requirements
- Warranty terms