Ingersoll Rand 551SMA Large Air Drill is engineered for the most demanding industrial drilling applications where exceptional power and maximum torque are required. As part of the 551 Series, this pneumatic drill delivers up to 5.6 HP with a 120 RPM free speed, making it well suited for drilling very large-diameter holes in structural steel, heavy equipment, mining equipment, fabrication facilities, shipbuilding, and other demanding industrial environments. Its heavy-duty pneumatic design is built to provide reliable performance during continuous production and maintenance operations.
The 551SMA combines a powerful 5.6 HP air motor with an extremely low operating speed to maximize drilling torque for the toughest applications. Pneumatic operation delivers dependable performance in facilities equipped with compressed air while eliminating the need for electrical power at the work location. Designed for professional industrial users, this large air drill is ideal for repetitive heavy-duty drilling where controlled speed and high torque are critical.
Type: Large Air Drill | Series: 551 Series | Model: 551SMA | Maximum Power: 5.6 HP | Free Speed: 120 RPM
Features:
- 551 Series pneumatic drill engineered for demanding industrial drilling applications.
- 5.6 horsepower air motor delivers exceptional power for heavy-duty production work.
- 120 RPM free speed provides maximum torque for very large-diameter drilling operations.
- Pneumatic operation is well suited for continuous-duty industrial environments supplied with compressed air.
- Designed for repetitive drilling in fabrication, manufacturing, heavy equipment, mining, and industrial maintenance operations.
- Heavy-duty construction supports dependable performance in the most demanding industrial workplaces.
Tech Tip: To increase tool performance, extend tool life and lessen repair costs use it with a Filter-Regulator-Lubricator (FRLs)
Applications:
- Structural steel fabrication and heavy construction.
- Heavy equipment and mining equipment manufacturing.
- Shipbuilding and marine fabrication.
- Industrial plant maintenance and shutdown operations.
- Large-diameter metal drilling applications requiring maximum torque and controlled low-speed performance.
FAQs:
- Q: What makes the 551SMA suitable for the most demanding drilling applications?
A: Its combination of a 5.6 HP air motor and a low 120 RPM free speed is intended to provide maximum torque for heavy-duty industrial drilling operations. - Q: How does the 551SMA compare to the 44SMA?
A: Based on the provided catalog, the 551SMA is rated at 5.6 HP and 120 RPM, while the 44SMA is rated at 3.6 HP and 155 RPM. - Q: What types of industries commonly use this drill?
A: It is intended for structural steel fabrication, heavy equipment manufacturing, mining operations, shipbuilding, industrial maintenance, and other demanding metalworking applications. - Q: Is this drill designed for continuous industrial service?
A: Yes. The 551 Series is intended for demanding industrial drilling applications where dependable pneumatic performance is required. - Q: Does the catalog specify chuck capacity or spindle details?
A: No. Those specifications were not confirmed in the provided source and have therefore been omitted.
| SKU | Free Speed | Capacity In Steel Drilling | Capacity In Steel Reaming | Spindle | Spindle Attachment | Max Power | Length Of Feed | Weight | Height Over Spindle | Side To Center Distance | CFM | Inlet Size | NPT Air Recommended Size Hose |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RPM | IN (MM) | IN (MM) | HP (KW) | IN (MM) | LB (KG) | IN (MM) | IN (MM) | IN | IN (MM) | ||||
| 22JA1 | 1,025 | 9/16” (14) | 3/8” (10) | Stub taper, threaded chuck | 5/64–1/2” | 1.75 (1.31) | 2.5” (63) | 15 (6.8) | 16.38” (416) | 1.44” (36) | 55 | 1/2” | 3/4” (19) |
| 22KA1 | 725 | 9/16” (14) | 7/16” (11) | Stub taper, threaded chuck | 5/64–1/2” | 1.75 (1.31) | 2.5” (63) | 15.25 (6.92) | 17.63” (448) | 1.44” (36) | 55 | 1/2” | 3/4” (19) |
| 22MA2 | 350 | 7/8” (22) | 5/8” (16) | No. 2 Morse taper | N/A | 1.75 (1.31) | 2.5” (63) | 14.25 (6.46) | 18.63” (473) | 1.44” (36) | 55 | 1/2” | 3/4” (19) |
| 22NA1 | 280 | 7/8” (22) | 5/8” (16) | Stub taper, threaded drive | 5/8” square | 1.65 (1.23) | 2.5” (63) | 16.5 (7.48) | 20.38” (517) | 1.44” (36) | 55 | 1/2” | 3/4” (19) |
| 22KWA1 | 725 | N/A | N/A | Stub taper, threaded wood | 1/2” shank | 1.75 (1.31) | 2.5” (63) | 14.25 (6.46) | 17.25” (438) | 1.44” (36) | 55 | 1/2” | 3/4” (19) |
| 33SJA | 450 | 1” (25) | 15/16” (24) | No. 3 Morse taper | N/A | 3.0 (2.24) | 4.25” (108) | 25.75 (11.7) | 14” (355) | 1.88” (47) | 85 | 1/2” | 3/4” (19) |
| 33SKA | 300 | 1-1/4” (32) | 1” (25) | No. 3 Morse taper | N/A | 3.0 (2.24) | 4.25” (108) | 25.75 (11.7) | 14” (355) | 1.88” (47) | 85 | 1/2” | 3/4” (19) |
| 33SMA | 185 | 1-1/4” (32) | 1-1/4” (32) | No. 3 Morse taper | N/A | 2.9 (2.16) | 4.25” (108) | 31 (14.1) | 16.81” (427) | 1.94” (49) | 85 | 1/2” | 3/4” (19) |
| 44SMA | 155 | 2” (51) | 2” (51) | No. 4 Morse taper | N/A | 3.6 (2.69) | 4.25” (108) | 43.75 (19.8) | 18.25” (463) | 2.31” (59) | 102 | 1/2” | 3/4” (19) |
| 551SMA | 120 | 3” (76) | 2-1/2” (64) | No. 5 Morse taper | N/A | 5.6 (4.18) | 5” (127) | 69 (31.3) | 21.88” (556) | 2.94” (75) | 160 | 1” | 1” (25) |
| 551SOA | 77 | Heavy | Heavy | No. 5 Morse taper | N/A | 5.6 (4.18) | 5” (127) | 69.5 (31.5) | 21.88” (556) | 2.94” (75) | 160 | 1” | 1” (25) |
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