Sigma arm mixer (Eagle series)
For consistent small-batch mixing
The Shaffer Eagle series sigma arm mixers are medium-duty mixers designed for consistent, small batch production ranging from 90 to 227 kg. With a focus on versatility and efficiency, these mixers provide an economical solution for smaller bakeries or production lines requiring precise dough and batter handling.
Highlights:
- Custom frame options: enclosed or open frame design
- Sanitary construction: stainless steel for hygiene and durability
- Hydraulic bowl tilt: forward or two-way tilt for easy discharge
- Operator interface: touchscreen with PLC controls and push buttons with universal labels
- Frame type: hybrid open frame
- Agitator options: triple roller bar, single sigma arm, double sigma arm
- Batch capacity: less than 227 kg, 227 to 727 kg
Ideal applications for the sigma arm mixer (Eagle series) includes:
- Biscuit, bread, roll, and sweet dough mixing
- Cakes and muffin batter mixing
- Confectionary cream, cream filling, and icing mixing
- Rotary moulded cookie, cracker, pretzel, and pizza dough mixing
- Pet treat ingredient mixing
- Corn flour tostada, tortilla, and masa mixing
Coperion also offers a range of horizontal dough mixers for food and bakery processing,

- Overview
- Range
- Features
- Gallery
The Shaffer Eagle series, a medium-duty mixer, is designed for medium-duty applications requiring consistent, small-batch mixing of doughs, batters, and specialty formulations, including bread, rolls, cakes, muffins, confectionery creams, and rotary-moulded cookie or cracker dough.
Reliable, hygienic, and adaptable
With batch capacities from 90 kg to 727 kg, the Eagle Series handles small to medium production volumes with ease. Its stainless-steel construction ensures hygiene and long-term durability, while the hybrid open frame or enclosed frame options provide flexibility for different production layouts.
Operator-focused design of the sigma arm mixer
Hydraulic forward or two-way bowl tilt options facilitate easy discharge and cleaning. Touchscreen operator interfaces, PLC controls, and universal push-button labels make operation intuitive. Additional features such as NEMA 4X enclosures, UL/cUL compliant controls, BISSC certification, and ANSI/USDA/CE compliance ensure a safe, production-ready design suitable for global standards.
| Model | Agitator speed (rpm) | Usable bowl volume | Rated bowl volume |
|---|---|---|---|
| HS4 | 70 | 181 kg (400 lb) | 385 L (13.6 cu ft) |
| HS5 | 70 | 272 kg (600 lb) | 504 L (17.8 cu ft) |
| SA2 | 40 | 249 kg (550 lb) | 385 L (13.6 cu ft) |
| SA3 | 40 | 363 kg (800 lb) | 504 L (17.8 cu ft) |
| DA25 | 80 | 91 kg (200 lb) | 130 L (4.6 cu ft) |
| DA70 | 80 | 227 kg (500 lb) | 300 L (10.6 cu ft) |
- NEMA 4X water-tight enclosures where applicable
- Rotary face agitator shaft seals (U.S. Patent No. 10,174,842)
- UL, cUL compliant controls
- BISSC certified
- ANSI, USDA, and CE compliant







Why choose the Shaffer sigma arm mixer- Eagles series?
The Eagle series mixer is ideal for smaller bakery operations currently relying on multiple vertical mixers, such as Hobart mixers. One Eagle series mixer can replace 3-4 vertical mixers, streamlining production and increasing efficiency with a customized fit for specific recipes. Perfect for smaller bakeries transitioning from manual to automated production or food plants expanding their production lines. In larger bakeries, it also serves well as a test mixer for product development or for producing small batches of specialty items like tortillas and pretzels.
Download
brochure
To learn more about the Eagles series mixer by Shaffer, please download our PDF documentation.
Request a quote
Our sales team is standing by to help you find and procure the right equipment for your process requirements.






