Machine Comparison
Okuma GP-57N vs Okuma GP-67N
Okuma vs Okuma · CNC Grinding Machines
Summary
The Okuma GP-57N and the Okuma GP-67N are neighboring sizes in Okuma's family of CNC cylindrical grinders for rolls and long shafts. The table shows no difference between them: both come with 2,150, 2,650, or 3,150 mm (84.65, 104.33, or 124.02 in) between centers, and both list a 12 m/min (472 ipm) rapid traverse.
Okuma publishes few comparable figures for this pair, and the table has no row for the grinding diameter that sets them apart. In words: the Okuma GP-67N is the larger machine, meant for large rolls and for work that has outgrown the Okuma GP-57N, while the Okuma GP-57N handles rolls and flanged shafts of smaller diameter over the same lengths.
Specifications Comparison
| Specification | Okuma GP-57N | Okuma GP-67N |
|---|---|---|
| Rapid Traverse | 12 m/min (472 ipm) | 12 m/min (472 ipm) |
| Distance Between Centers | 2,150, 2,650, or 3,150 mm (84.65, 104.33, or 124.02 in) | 2,150, 2,650, or 3,150 mm (84.65, 104.33, or 124.02 in) |
Advantages
Okuma GP-57N
- Covers rolls and large shafts that do not need the extra diameter capacity of the Okuma GP-67N
- Same three bed lengths as the larger machine, up to 3,150 mm (124.02 in) between centers
Okuma GP-67N
- Takes large rolls that have outgrown the Okuma GP-57N in diameter
- Keeps the same 2,150, 2,650, or 3,150 mm between-centers options, so the extra diameter costs no length
Verdict
Choose by roll diameter, since nothing else in the table differs. A shop whose rolls and flanged shafts fit the Okuma GP-57N gets the same 2,150, 2,650, or 3,150 mm between centers and the same 12 m/min (472 ipm) rapid traverse as on the larger grinder. A shop with large rolls beyond that capacity, or one expecting its work to grow in diameter, should choose the Okuma GP-67N.