Okamoto ACC-818SAiQ
Image: okamotocorp.com, Okamoto
Key Specifications
Table Size
max chuck size
distance wheel to table
wheel size
dresser
table stroke positions
How much does the Okamoto ACC-818SAiQ cost?
Price estimate
We do not have a price for the Okamoto ACC-818SAiQ that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.
Overview
The Okamoto ACC-818SAiQ is a form grinder with an 8 x 20 in (200 x 500 mm) table that takes a chuck up to 8 x 18 in (203 x 457 mm). The distance from wheel to table is 14.07 in (357 mm). The wheel is 8 in (200 mm) in diameter on a 1.25 in (31.7 mm) bore, in widths from 0.24 to 1 in (6 to 25 mm).
The dresser is what makes it a form grinder. Okamoto lists a 3-point diamond dresser system, made up of a 2-point angle dresser and a 1-point straight dresser. The wheel can therefore be dressed on its flanks as well as on its face, and the narrow end of the width range suits slots, steps and thin ribs that a full-width wheel cannot enter.
The table is driven by a precision ballscrew on full-contact double-V ways, and up to 5 table stroke positions can be set. A ballscrew drive reverses at a programmed position, which matters when the wheel has to stop close to a shoulder. The castings are heavily ribbed Meehanite iron, and a frequency inverter for the spindle motor is standard, so wheel speed can be adjusted to the wheel in use.
Full Specifications
| Parameter | Value |
|---|---|
| Table Size | 8 x 20 in (200 x 500 mm) |
| Max Chuck Size | 8 x 18 in (203 x 457 mm) |
| Distance Wheel to Table | 14.07 in (357 mm) |
| Wheel Size | 8 x 0.24-1 x 1.25 in (200 x 6-25 x 31.7 mm), D x W x B |
| Dresser | 3-point diamond dresser system (2-point angle dresser + 1-point straight dresser) |
| Table Stroke Positions | Up to 5 |
| Table Drive | Precision ballscrew on full-contact double-V table ways |
| Construction | Heavily ribbed Meehanite cast iron |
| Spindle Drive | Frequency inverter for spindle motor (standard) |
Specifications sourced from okamotocorp.com — verified 2026-09-25
Strengths & Limitations
Strengths
- 3-point diamond dresser system: a 2-point angle dresser plus a 1-point straight dresser
- Table driven by a precision ballscrew on full-contact double-V ways, with up to 5 table stroke positions
- Frequency inverter for the spindle motor is standard equipment
- Accepts wheels from 0.24 to 1 in (6 to 25 mm) wide on an 8 in (200 mm) diameter
- Heavily ribbed Meehanite cast iron construction
Limitations
- Chuck size tops out at 8 x 18 in (203 x 457 mm), so this is a machine for small tooling components, not plate work
- Wheel width stops at 1 in (25 mm), which makes wide flat surfaces slow to cover
- No spindle power, axis travel or machine weight is listed for this model
Best For
Frequently Asked Questions
01
The table is 8 x 20 in (200 x 500 mm) and the largest chuck is 8 x 18 in (203 x 457 mm). The distance from the wheel to the table is 14.07 in (357 mm), and the chuck and any fixture come out of that height before the part does.
02
Okamoto lists a 3-point diamond dresser system. It combines a 2-point angle dresser with a 1-point straight dresser, so the wheel can be given angled flanks as well as a straight face without setting up a separate dressing fixture on the chuck.
03
The wheel is 8 in (200 mm) in diameter with a 1.25 in (31.7 mm) bore. Width runs from 0.24 to 1 in (6 to 25 mm). A frequency inverter for the spindle motor is standard, which allows the wheel speed to be matched to the wheel fitted.
