## 2 Materials and Methods
### Testing Phase
\begin{table}
\begin{tabular}{c c c} \hline \hline
**Grinding process** & \multicolumn{2}{c}{Traverse surface grinding} \\ \hline
**Grinding machine** & \multicolumn{2}{c}{5-axis CNC grinding machine} \\ \hline
**Grinding wheel** & 5A1 \(28\times 20\times 10\)/15 \(\times\)14 B126 V180 SV (Inter-Diament, Grodzisk Mazowiecki, Poland) \\ \hline
**Grinding wheel dressing parameters** &
\begin{tabular}{c} Dresser: Single grain diamond dresser type M 1010 with mass of crystal \(Q_{d}\) = 0.75 ct (Inter-Diament, Grodzisk Mazowiecki, Poland), grinding wheel rotational speed while dressing: \(n_{sd}\) = 10,000 min\({}^{-1}\), dressing allowance: \(a_{d}\) = 0.0125 mm, table feed speed while dressing: \(v_{fd}\) = 10 mm/s, number of dressing passes: \(i_{d}\) = 6 \\ \hline
**Grinding parameters** &
\begin{tabular}{c} Grinding wheel peripheral speed: \(v_{s}\) = 55.7 m/s, grinding wheel \\ rotational speed: \(n_{s}\) = 38,000 min\({}^{-1}\), working engagement \\ (machining allowance): \(a_{e}\) = 0.05 mm, workpiece peripheral speed: \(v_{w}\) = 300–700 min\({}^{-1}\), total grinding time: \(t_{g\ tot}\) = 210 s \\ \hline
**Workpieces** & Working surfaces of low-stiffness planar industrial cutting blades \\ \hline
**GF delivery method** & \multicolumn{2}{c}{Water aerosol delivered by a single spray nozzle} \\ \hline
**GF working pressure** & \multicolumn{2}{c}{Supply air pressure: \(p\) = 0.8 MPa} \\ \hline
**GF type** & \multicolumn{2}{c}{5\% water solution of Syntilo RHS oil (Castrol Ltd., Liverpool, Great Britain)} \\ \hline
**GF flow rate** & \multicolumn{2}{c}{\(Q_{GF}\) = 1050 mL/h} \\ \hline
**No** & \begin{tabular}{c} **Sample** \\ **designation** \\ \end{tabular} & \
\begin{tabular}{c} **Workpiece peripheral** \\ **speed, mm/min** \\ \end{tabular} &
\begin{tabular}{c} **Rotational speed,** \\ **min\({}^{-1}\)** \\ \end{tabular} & **Grinding** \\ \hline
1. & B1-1 & 300 \\ \hline
2. & B1-2 & 350 \\ \hline
3. & B1-3 & 400 \\ \hline
4. & B1-4 & 400 \\ \hline
5. & B1-5 & 450 \\ \hline
6. & B1-6 & 500 \\ \hline
7. & B1-7 & 700 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: General characteristics of machining conditions. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Group** & **Parameter** & **Unit** & **Description** & **Importance** & **IOP** & **CMS** \\ \hline \multirow{6}{*}{Amplitude 1} & \multirow{2}{*}{\(Sa\)} & \(\mu\)m & Arithmetic mean deviation & \multirow{2}{*}{Essential} & \multirow{2}{*}{Yes} & \multirow{2}{*}{Yes} \\  & & & of the surface & & & \\ \cline{2-6}  & \(St\) & \(\mu\)m & Total height of the surface & Essential & Yes & Yes \\ \cline{2-6}  & \(Sp\) & \(\mu\)m & Maximum height of \multirow{2}{*}{Additional} & \multirow{2}{*}{–} & \multirow{2}{*}{Yes} \\  & & & summits & & & \\ \cline{2-6}  & \(Sv\) & \(\mu\)m & Maximum depth of valleys & Additional & – & Yes \\ \cline{2-6}  & \(Ssk\) & – &
\begin{tabular}{c} Skewness of the height \\ distribution \\ \end{tabular} & Additional & – & Yes \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Surface texture parameters used for characterization of regenerated industrial cutting blades during the precision grinding process realized in a 5-axis CNC grinding machine.