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Feature
The spindle head design places the center of gravity at the rear portion to help balancing the whole spindle mechanism to increase spindle accuracy and loading capacity.
Spindle driven by servo motor offers optimum speed and torque performance.
Complete one piece cartridge spindle can avoid the eccentricity of spindle housing and reduces the heat increase for spindle longevity.
X axis lower slide design offers easy adjustment of the workhead for grinding parts with different lengths.
Machine incorporates roller type linear guide ways for X/Z/Y axes for high dynamic rigidity and better loading capacity. This drastically increases the grinding accuracy.
C1 grade precision ball screw with large leading pitch is used to achieve high accuracy.
Low-gravity base structure, with slant bed design for better coolant draining and grinding swarf removal.
Grinding Example
Standard grinding cycles and multi-steps graphic
Inner through
2 Step straight hole
Inner through hole + outer end-face
Inner blind hole + Inner end-face
Inner taper
Inner blind hole + ID chamer
Inner radius groovin
Inner through hole + Inner radius
Multi-step grinding
Profile grinding
Form grinding
Specification
| Model | EGM-80CNC | EGM-350CNC | EGM-350LCNC | EGM-450CNC | EGM-550L/XLCNC |
|---|---|---|---|---|---|
| Grinding Capacity | |||||
| Max. grinding ID | Ø3.15" | φ15.7″ | φ11.8″ | φ15.7″ | φ19.69" |
| Max. grinding OD | Ø3.15" | φ15.7″ | φ12.9″ | φ15.7″ | φ21.65" |
| Swing over workhead | Ø9.45" | φ19.6″ | φ13.3″ | φ16.1″ | φ22.05" |
| Max. grinding depth | 3.15" | 10.2″ | 10.2″ | 10.2″ | 21.65" |
| Max. weight of workpiece | 55.12 Lbs. | 110 Lbs. | 661 (w/ steady rest) Lbs. | 110 Lbs. | 1102.31 Lbs. (Include steady rest) |
| Max. length of workpiece | 3.15" | 11.8″ | 29.5″ | 11.8″ | 47.24" / 78.74" |
| Type of workhead | Dual independent wheelhead | Dual independent wheelhead | Dual independent wheelhead | Dual independent wheelhead | Dual independent wheelhead |
| Workhead (X Axis) | |||||
| 3-Jaw chuck | Hydraulic 5"/6〞(opt.) | Hydraulic – 8″/10″(opt.) | Manual – 8″/10″(opt.) | Hydraulic – 8″/10″(opt.) | Manual - 8” / 10” / 12”(opt.) |
| Swiveling angle range | ＋45°～–10° | +15°~ -5° | +15°~ -5° | +15°~ -5° | +8.5° ~ -2° |
| Manual travel distance (toward Z axis) | 7.87" | 9.8″ | 21.6″ | 9.8″ | 39.37" / 61.02" |
| Spindle speed (infinite variable) | 0～1000 rpm (Infinite variable ) | 0~1000 rpm (Variable speed) | 0~1000 rpm (Variable speed) | 0~1000 rpm (Variable speed) | 0~300 rpm (Variable speed) |
| Servo motor rated power | 1.61(F) / 2.01(M) hp | 2.41(F) / 2.95(M) hp | 2.41(F) / 2.95(M) hp | 2.41(F) / 2.95(M) hp | 2.95(M) hp |
| Grinding Wheelhead(Y Axis) | |||||
| OD grinding wheel size | N/A | N/A | N/A | φ16″x2″xφ5″ | N/A |
| ID grinding wheel size | Ø2.36" | φ3.9″ | φ3.9″ | N/A | φ3.9″ |
| Max. spindle speed | 20,000 rpm (std.) | 10,000 rpm (std.) | 10,000 rpm (std.) | 10,000 rpm (std.) | 8,000 rpm (std.) |
| Spindle motor/ max. torque | 2.95 hp / 5.39 lb-ft | 5.03 hp / 9.59 lb-ft | 5.03 hp / 9.59 lb-ft | 5.03 hp / 19.18 lb-ft | 5.03 hp / 9.59 lb-ft |
| Grinding Wheelhead (Z Axis) | |||||
| OD grinding wheel size | Ø3.94 | φ3.9″ | φ3.9″ | N/A | φ3.9″ |
| ID grinding wheel size | N／A | N/A | N/A | φ3.9″ | N/A |
| Max. spindle speed | 8,000 rpm (std.) | 20,000 rpm (std.) | 20,000 rpm (std.) | 20,000 rpm (std.) | 8,000 rpm (std.) |
| Spindle motor/ max. torque | 2.95 hp / 5.39 lb-ft | 5.03 hp / 9.59 lb-ft | 5.03 hp / 9.59 lb-ft | 5.03 hp / 9.59 lb-ft | 5.03 hp / 9.59 lb-ft |
| X Axis | |||||
| Travel | 13.78" | 16.5″ | 16.5″ | 17.7″ | 23.62" |
| Rapid feedrate | 26.25' /min | 26.17' /min | 26.17' /min | 26.17' /min | 26.25' /min |
| Heidenhain linear scale resolution | 0.000002" | 0.000002″ | 0.000002″ | 0.000002″ | 0.00197" |
| Min. increment | 0.0000039" | 0.000010″ | 0.000010″ | 0.000010″ | 0.000004" |
| Servo motor rated power | 1.2(F)／1.5(M) hp | 2.41(F) / 2.95(M) hp | 3.35(F) / 4.02(M) hp | 2.41(F) / 2.95(M) hp | 2.95(F) / 4.69(M) hp |
| Y Axis | |||||
| Travel | 7.09" | 13.7″ | 13.7″ | 13.7″ | 23.62" |
| Rapid feedrate | 26.25' /min | 26.17' /min | 26.17' /min | 26.17' /min | 26.25' /min |
| Min. increment | 0.0000039" | 0.000010″ | 0.000010″ | 0.000010″ | 0.000004" |
| Servo motor rated power | 1.61 (F) / 2.01 (M) hp | 2.41(F) / 2.95(M) hp | 2.41(F) / 2.95(M) hp | 2.41(F) / 2.95(M) hp | 2.95(M) hp |
| Z Axis | |||||
| Travel | 7.09" | 13.7″ | 13.7″ | 13.7″ | 23.62" |
| Rapid feedrate | 26.25' /min | 26.17' /min | 26.17' /min | 26.17' /min | 26.25' /min |
| Min. increment | 0.0000039" | 0.000010″ | 0.000010″ | 0.000010″ | 0.000004" |
| Servo motor rated power | 1.61 (F) / 2.01 (M) hp | 2.41(F) / 2.95(M) hp | 2.41(F) / 2.95(M) hp | 2.41(F) / 2.95(M) hp | 2.95(M) hp |
| Motor | |||||
| Hydraulic motor | 0.5 hp | 1.01 hp | 1.01 hp | 1.01 hp | N/A |
| Coolant pump | 0.24 hp | 0.5 hp+0.24 hp | 0.5 hp+0.24 hp | 0.5 hp+0.24 hp | 0.5 hp+0.5 hp |
| Machine | |||||
| Net weight | 6,614 Lbs. | 12,786 Lbs. | 14 990 Lbs. | 13,890 Lbs. | 22,707.6 Lbs. / 25,872.1 Lbs. |
| Gross weight | 7,496 Lbs. | 13,890 Lbs. | 16 100 Lbs. | 14,990 Lbs. | 24,901.5 Lbs. / 28,094.3 Lbs. |
| Packing size (L x W x H) | 84.65” x 68.9” x 73.23” | 132″ x 88″ x 77″ | 159″ x 88″ x 77″ | 132″ x 88″ x 77″ | 158.66" x 86.61" x 87.80" / 190.16" x 86.61" x 87.80" |
Accessories
