Ingersoll Rand Bare Pumps - Proven Power for Industrial Applications

Why Ingersoll Rand Bare Pumps Are Built to Last

An air compressor’s bare pump is its beating heart — the core assembly of cylinders, crankshaft and valves that compress air before it ever reaches a tank or hose. When a pump wears out, swapping the entire compressor isn’t always necessary. Ingersoll Rand’s line of Type 30 two‑stage and single‑stage bare pumps let you restore performance and upgrade capacity by replacing just the pump body. They’re built from cast‑iron for superior strength and vibration damping (Cast Iron technical guide) meaning they can handle heavy‑duty workloads without excessive wear. Materials scientists note that gray cast iron’s high damping capacity helps suppress vibrations (Wiki damping capacity), which translates to smoother, quieter operation and longer service life.

Ingersoll Rand’s bare pumps span compact single‑stage units like the SS3 and SS5, as well as the Type 30 two‑stage models (15T, 2340, 2475, 2545, 7100, 2000 and their vertical and gas‑driven variants). Whether you’re running a small repair shop or a large industrial line, there’s a pump sized for your airflow and pressure needs.

Proper maintenance keeps these pumps running efficiently. Neglecting routine checks can lead to higher energy use, hot running temperatures and reduced capacity (Energy tips). That’s why each Ingersoll Rand bare pump includes easy‑access oil sight glasses, balanced crankshafts and finned cylinders to simplify upkeep.

Overview of the Ingersoll Rand Bare-Pump Lineup

Ingersoll Rand offers a diverse bare‑pump lineup to match everything from hobbyist workshops to high‑demand industrial lines. The pumps are available as single‑stage units for lower‑pressure applications and two‑stage units for higher‑pressure, higher‑CFM demands. Single‑stage pumps compress air only once , so they are ideal for projects requiring up to about 135 PSI. Two‑stage pumps compress the air twice and use an intercooler between stages, allowing them to deliver higher pressures—up to 175 PSI—more efficiently. We carry an authorized selection of both types (Shop Bare Pumps).

Single-Stage Lineup

SS3 Bare Pump: A compact single‑stage pump delivering about 11 CFM at 90 PSI and operating up to 135 PSI. It’s rated for 2–5 HP, making it perfect for small shops and light‑industrial tasks.

SS5 Bare Pump: A larger single‑stage pump that provides roughly 18 CFM at 90 PSI within the same 135‑PSI limit and accepts 3–5 HP motors. It offers extra airflow for busier garages, without stepping up to a two‑stage design.

Two-Stage Lineup

The Type 30 family consists of heavy‑duty cast‑iron pumps built for continuous duty. Models range from 1.5 HP micro‑units up to 25 HP industrial workhorses, with airflow from 8 to 50 CFM. All two‑stage models deliver up to 175 PSI and come with finned cylinders and splash lubrication for longevity.

• 15T Bare Pump: Compact (1.5–3 HP) with an output of 8–10 CFM - ideal for small commercial shops.

• 2340 Bare Pump: Mid‑range unit producing 14 CFM with a 3–5 HP motor, balancing size and output..

• 2475 Bare Pump: A true workhorse offering 17–24 CFM at 175 PSI with 5–7.5 HP motors; perfect for maintenance departments and production lines.

• 2475 Gas Bare Pump: Gas‑driven version delivering 24–27 CFM using 8–13 HP engines, providing portable power where electricity is unavailable.

• 2545 Bare Pump: High‑output pump producing 24–35 CFM with 7.5–10 HP motors, often used in machine shops needing continuous air.

• 2545V Bare Pump: The same performance as the 2545 in a vertical orientation to save floor space.

• 7100 Bare Pump: A large dual‑cylinder pump delivering 40–50 CFM for 10–15 HP motors, designed for high‑volume industrial applications.

• 7100V Bare Pump: The vertical counterpart of the 7100, offering identical output while minimizing footprint.

• 2000 Bare Pump: The largest unit (20–25 HP) with up to 50 CFM airflow, built for heavy manufacturing.

For in‑depth guidance on specific models and applications, continue reading the following sections. If you are considering a gas‑powered unit, don’t miss our companion post on Ingersoll Rand Gas‑Driven Air Compressors We also explore the broader range of Ingersoll Rand parts in Ingersoll Rand Air Compressor Parts – What You Need to Know

Single-Stage Bare Pumps

Ingersoll Rand’s single‑stage bare pumps are built for applications that demand reliable air at modest pressures (around 135 PSI) rather than the high pressures provided by two‑stage designs. They are popular for small repair shops, light manufacturing and service vehicles where simplicity and low maintenance are paramount. Both of the Type 30 single‑stage models use all‑cast‑iron components—cast iron’s high vibration‑damping capability makes it the preferred material for machine tools and pumps because it minimizes vibration and improves part accuracy. Below are their key characteristics.

SS3 (Type 30) - Compact Workhorse

The SS3 is a durable, compact single‑stage pump that’s engineered for light‑industrial and commercial use. Its precision‑balanced crankshaft and two‑cylinder design provide smooth compression with minimal vibration. Deep‑finned cylinders and an integral aftercooler help dissipate heat, while the splash‑lubricated crankcase with a handy sight glass makes oil checks simple. Technical details include:

• Operating pressure: up to 135 PSI

• Air delivery: approximately 11.3 CFM at 90 PSI when paired with a 5‑HP motor

• Horsepower range: 2–5 HP recommended

• Speed range: 800–1 350 RPM

• Weight & size: about 90 lb; 17 × 15 × 14 in footprint

Thanks to its compact size and high CFM output, the SS3 is often mounted on service trucks or tucked under a bench in small workshops. Cast‑iron construction and balanced components mean quieter operation and longer life—a trait of gray cast iron that engineers value for vibration damping. For further reading on replacement parts and maintenance, see our blog “Ingersoll Rand Air Compressor Parts – What You Need to Know”.

SS5 (Type 30) - More Airflow for Busy Shops

When you need more airflow but don’t require a two‑stage compressor, the SS5 delivers. This rugged single‑stage pump is built from the same 100 % cast‑iron crankcase and cylinders as the SS3, but uses a slightly larger frame to move more air. It’s balanced for smooth operation and features deep‑finned heads with integral aftercooling to keep discharge temperatures low. Key specifications include:

• Operating pressure: up to 135 PSI

• Air delivery: ~18 CFM at 90 PSI (5‑HP typical configuration)

• Horsepower range: 3–5 HP recommended

• Speed range: 800–1 300 RPM

• Weight & size: around 110 lb; 18 × 16 × 15 in

With its higher CFM output, the SS5 suits automotive bays, fabrication benches and maintenance crews running multiple air tools. Though both SS3 and SS5 are rated at the same maximum pressure, the SS5’s larger cylinders and flywheel enable extended duty cycles. If you plan to run continuous heavy duty or high‑pressure tools, step up to the two‑stage models covered in the next section; otherwise, these single‑stage pumps offer a cost‑effective solution with simple maintenance

Electric Two-Stage Bare Pumps

Two‑stage compressors compress air twice, with intercooling between stages; this extra step improves efficiency and raises maximum pressure. Because the air is cooled between stages, two‑stage pumps generate less heat and moisture than single‑stage models, which improves durability and reduces oil degradation. Many operations also find that two‑stage compressors deliver more airflow at a given horsepower, lowering total cost of ownership by reducing energy consumption.

Below is an overview of Ingersoll Rand’s Type 30 two‑stage electric bare pumps, ranging from compact 1.5 HP units to 25 HP industrial workhorses. Each pump features cast‑iron frames and cylinders for vibration damping and long service life, plus splash lubrication and deep‑finned cylinders for cooling.

15T - Compact Two-Stage Performer

Ideal for small shops and light manufacturing, the 15T delivers high pressure in a small package. A balanced crankshaft and cast‑iron cylinders minimize vibration while dual‑stage pistons provide efficient compression.

• Operating pressure: up to 175 PSI

• Air delivery: 8–10 CFM at 175 PSI

• Horsepower range: 1.5–3 HP; speed range: 600–1 250 RPM

• Weight & size: about 85 lb, 16 × 14 × 13 in

• Design features: all‑cast‑iron construction, fin‑cooled cylinders, splash lubrication and a balanced crankshaft for smooth operation.

Typical use: small commercial garages, body shops and light‑industrial workstations where space is limited but 175 PSI is required.

2340 - Mid-Range Two-Stage Unit

The 2340 pairs a compact footprint with a V‑twin two‑stage design that improves efficiency and cooling. Precision‑balanced components and deep‑finned heads reduce vibration and dissipate heat.

• Operating pressure: 175 PSI

• Air delivery: approximately 14 CFM at 175 PSI

• Horsepower range: 3–5 HP; speed range: 700–1 575 RPM

• Weight & size: roughly 150 lb; 20 × 19 × 17 in

• Key features: cast‑iron V‑twin cylinders with integrated intercooler and splash‑lubricated crankcase for easy maintenance.

Typical use: workshops, woodshops and maintenance areas needing a reliable mid‑size 175 PSI pump with modest CFM.

2475 - Heavy-Duty Workhorse

A favorite in industrial maintenance departments, the 2475 offers a large boost in airflow over the 2340 while maintaining the same maximum pressure. Finned cylinders and an intercooler keep temperatures down during continuous operation.

• Operating pressure: 175 PSI

• Air delivery: 16.8 CFM at 175 PSI with a 5‑HP motor; 24 CFM at 175 PSI with a 7.5‑HP motor

• Horsepower range: 5–7.5 HP; speed range: 575–1 600 RPM

• Weight & size: approximately 200 lb, 22 × 20 × 20 in

• Design features: cast‑iron cylinders and crankcase, stainless‑steel reed valves, fin‑cooled heads, and splash lubrication.

Typical use: machine shops, production lines and maintenance facilities requiring continuous duty and higher CFM.

2545 - High-Output Two-Stage Pump

For applications demanding even more air, the 2545 steps up to larger pistons and deeper cooling fins. A robust V‑twin crankshaft and finned intercooler provide reliable performance under heavy loads.

• Operating pressure: 175 PSI

• Air delivery: 24–35 CFM at 175 PSI, depending on motor horsepower and drive speed

• Horsepower range: 7.5–10 HP; speed range: 400–1 050 RPM

• Weight & size: around 239 lb; 24 × 21 × 20 in

• Features: all‑cast‑iron construction, deep‑finned cylinders, a large flywheel for smoother operation, and an intercooler/aftercooler system to minimize heat and moisture.

Typical use: machine shops and industrial plants running multiple tools or requiring high volumes of compressed air.

2000 - Ultra-Capacity Powerhouse

The Type 30 Model 2000 is the largest electric bare pump in the Ingersoll Rand lineup. Its three‑cylinder “W” design distributes load evenly across the crankshaft for smoother compression and less vibration.. This unit is engineered for 20–25 HP systems and heavy industrial duty cycles where downtime is not an option.

• Operating pressure: 175 PSI

• Air delivery: 40–50 CFM at 175 PSI, depending on drive speed

• Horsepower range: 20–25 HP; speed range: 550–1 000 RPM

• Weight & size: approximately 650 lb; 37 × 30 × 27 in

• Key features: three‑cylinder W‑configuration with deep‑finned cylinders and integral intercooler, large oil sump for continuous duty, and oversized bearings for longevity.

Typical use: large industrial plants, production lines and multi‑tool workstations requiring sustained high CFM and 100 % duty cycle

Gas-Driven Bare Pump: Power Without a Plug

For jobsites without access to reliable electricity, Ingersoll Rand offers the 2475 Gas Two‑Stage Bare Pump. Engine‑driven compressors aren’t tethered to a power cord; automotive experts note that gas‑powered units deliver reliable performance “when electricity is unavailable, such as at remote job sites or during roadside emergencies”(caranddriver.com). This self‑contained design makes them ideal for service trucks, construction crews and field maintenance.

The 2475 gas variant carries the same cast‑iron durability and balanced twin‑cylinder design as the electric 2475, but pairs it with a belt‑driven gas engine. According to our product details, it’s engineered for high‑demand applications where electric power isn’t available. Key specifications include:

• Operating pressure: up to 175 PSI

• Air delivery: 24–27 CFM at 175 PSI (depending on engine horsepower and speed)

• Speed range: 575–1 600 RPMi

• Drive type: Gas engine (belt‑driven) with 8–13 HP recommended

• Dimensions & weight: approximately 22 × 20 × 20 in and ~200 lb

• Construction: 100 % cast‑iron crankcase and cylinders for superior heat resistance and longevity

• Cooling & lubrication: Finned intercooler/aftercooler passages and a splash‑lubricated oil system with an easy‑view sight glass

Beyond its specs, the 2475 Gas pump is designed to excel in harsh conditions. The balanced two‑cylinder design and precision‑machined components ensure smooth, efficient compression and cooler operating temperatures. The result is portable power that “provides the air capacity and dependability professionals trust in a fully self‑contained, engine‑driven configuration”. This model’s key benefits include:

• Portable power: Built for mobile and off‑grid air delivery, perfect for service trucks, construction sites and remote maintenance.

• Industrial reliability: Utilizes the proven Type 30 design and heavy‑duty cast‑iron construction found in stationary pumps.

• High output & efficiency: Two‑stage compression delivers high pressure with cooler operation, enabling extended duty cycles.

• Low maintenance: Belt‑driven setup with accessible service points for simple upkeep.

• Built for harsh conditions: Engineered to perform consistently in demanding outdoor environments.

For anyone comparing gas‑powered and electric compressors, it’s worth noting that electric units are lighter and quieter, making them ideal for indoor or stationary use. Gas‑powered units like the 2475 Gas pump shine when mobility and independence from the grid are paramount. If you’re seeking a self‑contained air source with high output and the rugged reliability of Ingersoll Rand’s Type 30 pumps, the 2475 Gas is hard to beat.

Vertical Variants: Save Floor Space Without Sacrificing Output

When square footage is tight, a vertical‑mount compressor can be a smart alternative to a horizontal unit. Vertical tanks and pumps stand upright, so they occupy less floor area — J&M Industrial notes that their slim, tall design makes them ideal for applications with limited floor space and provides a smaller footprint that’s easier to maneuver (jmindustrial.com). The trade‑off is that they require adequate height clearance and must be stabilized properly because their higher center of gravity can make them more prone to tipping.

Ingersoll Rand offers two vertical bare‑pump models that retain the power and durability of their horizontal counterparts while freeing up valuable floor space:

2545V - Compact Powerhouse for Tight Spaces

The 2545V is the vertical version of the heavy‑duty 2545. It retains the cast‑iron construction and balanced two‑stage design but stands upright to fit into tight mechanical rooms or workshops. Key specifications include:

• Operating pressure: up to 175 PSI

• Air delivery: 24–35 CFM at 175 PSI depending on RPM and horsepower

• Speed & power: 400–1 050 RPM with 7.5–10 HP motors

• Dimensions: 24 × 21 × 36 in, weighing about 240 lb

• Construction: 100 % cast‑iron frame, heads and cylinders for long life

• Cooling & lubrication: Deep‑finned cylinders with an integral intercooler and splash‑lubricated crankcase

Industrial features include continuous‑duty capability, simplified oil servicing and a space‑saving vertical mount. It delivers the same airflow and pressure as the standard 2545 but in a footprint that fits comfortably into narrow equipment rooms or crowded shop floors. Ideal applications include automotive bays, maintenance departments and small manufacturing facilities that need high airflow without dedicating large floor space.

7100V - High-Capacity Air in a Vetical Footprint

For facilities requiring even more air, the 7100V offers up to 50 CFM at 175 PSI while still reducing footprint. It is the vertical version of the 7100 and shares the same cast‑iron durability and balanced two‑stage performance.

• Operating pressure: up to 175 PSI

• Air delivery: up to 50 CFM at 175 PSI (when driven by a 10–15 HP motor)

• Speed & power: 750–1 100 RPM with 10–15 HP motors

• Dimensions: 30 × 27 × 45 in, about 450 lb

• Construction: Full cast‑iron pump frame with dual‑finned intercooler and aftercooler for optimal heat reduction

• Maintenance: Large oil reservoir and easy‑access sight glass for quick checks

The vertical layout minimizes floor space while maintaining continuous‑duty capability for heavy manufacturing, automotive service and fabrication shops. Users can expect the same reliable 100 % duty‑cycle performance and long service life as the horizontal 7100. For installations where width is constrained but height is available—such as plant corners, mezzanines or compact compressor enclosures—the 7100V delivers industrial power without spreading out across the floor.

Vertical bare‑pump models allow you to maximize workspace efficiency. If you’re unsure whether a vertical or horizontal pump best fits your facility, consult our Compare Bare Pumps table. For more details or ordering information, visit the product pages for the 2545V Vertical Bare Pump and the 7100V Vertical Bare Pump

High-Capacity Two-Stage Pumps (Horizontal)

For applications that demand sustained high volumes of compressed air—think manufacturing lines, multi‑bay automotive shops or heavy equipment service facilities—you need a pump that can keep up. That’s where the Ingersoll Rand 7100 comes in. This flagship Type 30 pump is engineered for high output and continuous duty, delivering up to 50 CFM at 175 PSI while maintaining reliability over long operating cycles.

7100 - Industrial Powerhouse

The 7100’s two‑stage V‑twin design and oversized flywheel produce cooler air and higher efficiency than smaller units. Each component is precision‑machined from 100 % cast iron, giving the pump strength and vibration damping that mechanical engineers prize for durability under heavy loads. Key specifications include:

• Operating pressure: up to 175 PSI

• Air delivery: up to 50 CFM at 175 PSI (depending on speed and drive configuration)

• Speed & power: 750–1 100 RPM with 10–15 HP motors

• Dimensions & weight: 30 × 27 × 26 in, approximately 450 lb

• Cooling & lubrication: Finned intercooler and aftercooler system to dissipate heat, with a splash‑lubricated crankcase and large oil capacity for extended service intervals

Industrial operators value the 7100’s continuous‑duty performance—it’s rated for 100 % duty cycle use and trusted for decades in production plants, fabrication shops and heavy‑service bays. The pump’s design makes maintenance straightforward: accessible oil fill and filter points allow quick servicing without disassembly. When choosing a motor or engine, ensure the pulley ratio keeps the pump within its recommended 750–1 100 RPM range for optimal cooling and longevity

Selection Criteria & Buying Guide

Finding the right bare pump isn’t just about picking the biggest unit—it's about matching compressor capability to your specific requirements. Below are key factors to evaluate before you order.

1. Required Pressure and Flow (PSI & CFM). Start by identifying the air tools or processes you’ll power. Each tool has a minimum pressure (PSI) and flow rate (CFM). Pick a pump that delivers at least 1.25–1.5 times the required CFM to avoid running the compressor at maximum capacity all the time. A higher PSI rating gives headroom for expansion, but there’s no need to oversize excessively. Single‑stage pumps like the SS3/SS5 handle up to 135 PSI, while two‑stage pumps deliver 175 PSI and higher CFM.

2. Duty Cycle and Horsepower. Consider how many hours per day the compressor will run. Light‑duty, intermittent use (e.g., a small repair shop) can be served by 2–5 HP single‑stage or mid‑range two‑stage pumps. Continuous‑duty industrial applications require larger two‑stage pumps (7.5–25 HP). Choosing a pump rated for your duty cycle prevents overheating and premature wear.

3. Space and Orientation (Vertical vs. Horizontal). Assess your installation footprint. The J&M Industrial guide notes that vertical tanks save floor space and are easier to maneuver through tight spaces, but they may be limited by ceiling height. Horizontal tanks are more stable and offer larger capacity but require more floor area. Choose a vertical pump (e.g., 2545V or 7100V) if floor space is at a premium, or a horizontal pump like the standard 7100 if you have room for a broader footprint.

4. Power Source and Portability (Electric vs. Gas). Think about where the compressor will operate. Electric units are quieter and easier to maintain, making them ideal for indoor workshops. Gas‑powered pumps provide reliable air “when electricity is unavailable, such as at remote job sites” (caranddriver.com). For mobile applications like service trucks or construction sites, the 2475 Gas pump delivers high output without requiring a power cord.

5. Portability Needs. If you need to move the compressor around your facility, consider the size and weight. Vertical pumps typically have a smaller footprint and can be easier to maneuver. Horizontal pumps offer more stability but are heavier and less portable. Gas‑driven models add mobility by eliminating the tether to an electrical outlet.

6. Budget. Balance initial cost with life‑cycle costs. Vertical tanks are often less expensive than horizontal tanks, but they may have lower capacity. High‑capacity pumps like the 7100 and 2000 cost more upfront but deliver greater airflow and may reduce the need for multiple smaller units. Also factor in maintenance and energy costs; over‑sizing wastes energy while under‑sizing shortens pump life.

7. Future Expansion and Flexibility. If you anticipate adding more tools or production lines, choose a pump with room to grow—either by selecting a model with higher CFM or by adding a larger tank. A modular approach might involve pairing a mid‑range pump with an auxiliary tank.

Maintenance & Service Tips

A well‑maintained compressor runs cooler, consumes less energy and avoids unexpected breakdowns. Neglect, on the other hand, leads to higher energy bills, pressure drops and moisture problems. Follow these best practices to keep your Ingersoll Rand bare pump in top form:

Set a Schedule and Stick to It

• Plan ahead: Establish a regular maintenance program and assign someone to oversee it. Document oil changes, filter replacements and inspections so nothing gets missed.

• Follow the manual: Manufacturers provide service intervals for a reason—dirty filters and worn parts increase energy use and shorten equipment life.

Keep Filters and Oil Clean

• Change air filters regularly: Torn or clogged intake filters reduce efficiency and let contaminants inside. Check for damage and excessive dirt; clean or replace as needed.

• Check oil levels: Lubrication keeps the crankshaft and bearings running smoothly. Verify oil levels and replace lubricant according to the pump’s schedule.

Control Heat and Moisture

• Clean cooling surfaces: Dirt on cooling fins, intercoolers and aftercoolers traps heat. Remove debris and ensure water‑cooled heat exchangers have unobstructed flow.

• Drain condensate: Receiver tanks and separators accumulate water and oil. Inspect drain valves—especially on the wet receiver between the pump and dryer—and repair or replace them if they stick.

Mind the Drive System

• Inspect belts and pulleys: Power transmission relies on proper belt tension and alignment. Look for cracks, glazing or slippage and adjust or replace belts before they fail.

Listen for Leaks

• Fix leaks quickly: Even tiny leaks waste energy and shorten compressor life. Walk the system regularly, listen for hissing at fittings and hoses, and repair leaks.

Check Pressure and Controls

• Run at the right pressure: Operating at higher pressure than necessary wastes energy and stresses components. Set system pressure to match your needs and adjust controls to reduce unnecessary cycling.

• Verify gauges and safety devices: Make sure pressure gauges, safety valves and control switches are functioning correctly.

Service Air Treatment Components

• Maintain dryers and filters: Replace filter elements when pressure drop exceeds the manufacturer’s limit (typically ~5 PSID). Check desiccant levels in desiccant dryers and clean condenser coils on refrigerated dryers.

By following a structured preventive maintenance routine—checking filters, fluids, cooling surfaces, belts, drains and controls—you’ll keep your Ingersoll Rand bare pump running efficiently and avoid the high costs of emergency repairs (energy.gov)

Conclusion

Replacing a bare pump instead of an entire compressor is often the most cost‑effective way to revive or upgrade your air system. Ingersoll Rand’s Type 30 and single‑stage pumps offer reliable, cast‑iron performance across a wide range of sizes—from compact SS3 and SS5 units to high‑capacity 7100 and 2000 powerhouses. You can choose horizontal or vertical configurations to fit your space, electric or gas drive for any location, and horsepower ratings from 1.5 to 25 HP. Whatever your application, there’s an Ingersoll Rand bare pump built for it.

Industrial Air Power makes upgrading easy. We stock OEM‑grade Ingersoll Rand replacement pumps and parts, ship fast and free within the U.S., and provide expert technical support to help match horsepower, CFM and drive speed. Our knowledge center offers additional guides on Ingersoll Rand parts, gas‑driven compressors and authorized distribution. Whether you’re rebuilding a worn compressor or scaling up to a higher‑capacity unit, you can count on Industrial Air Power for proven performance and the expertise to keep your system running strong