Desktop automatic letter opener (milling cutter) · OPEX
OPEX Omation Series 210
Speed: Up to 400 envelopes per minute (6" envelope) · Maximum thickness: Up to 0.188"
Listed on the manufacturer's website (source, as of Oct 18, 2026)

Where to buy
Machines in this class are mostly sold and serviced through the manufacturer's authorized dealers. We didn't find an Amazon listing for this exact model with a current offer. We don't show prices; ask a dealer or check the retailer for the current price.
Specifications
| Brand | OPEX |
|---|---|
| Model | Omation Series 210 |
| Type | Desktop automatic letter opener (milling cutter) |
| Cutting method | Milling cutter; depth 0.01" to 0.07"; three cut-depth settings plus no-cut |
| Speed | Up to 400 envelopes per minute (6" envelope) |
| Feed | Self-adjusting automatic feeder for mixed envelopes |
| Envelope sizes | All sizes and types (including overnight envelopes) |
| Maximum thickness | Up to 0.188" |
| Noise | Does not exceed 80 dB |
| Power | 110-120 VAC, 60 Hz, 5 A |
| Dimensions | 40.3" L × 16.5" D (18" with power cord) × 14.3" H |
| Weight | 52 lb |
OMATION Envelopener openers are made by OPEX Corporation.
OPEX's page text also gives up to 24,000 envelopes per hour for the Series 210 and 410; chip bin holds up to 3,500 envelopes' trimmings.
Values as published by the manufacturer, in its own units. Fields the manufacturer doesn't state are left out rather than estimated. Shown without scores or rankings.
Similar models
The closest models on the main specifications, chosen the same way for every brand. Listed alphabetically; not a ranking.
Image: FormaxFD 452
Up to 300 envelopes per minute · Up to 4 mm
Image: Martin Yale62001
Up to 17,500 envelopes per hour · 1/4" (0.6 cm)
Image: Martin YalePostMark 3056
8,000 envelopes per hour (production); 24,000 per hour (theoretical) · .25" (6 mm) auto feed; .39" (10 mm) manual feed
Image: OPEX CorporationOmation Series 410
Up to 400 envelopes per minute (6" envelope) · Up to 0.188"