Connecting Rod 97333173 for Ingersoll Rand SS5 – Rebuild Kit

Rebuild-Ready Matched Assembly — Con-rod 97333173 ships with big-end bore verified against your specific crankshaft journal grade, preventing mid-rebuild bearing mismatches.

Technical Specifications

Application Suitability

What Happens When a Rebuild Fails Before the First Run-In

A replacement connecting rod 97333173 arrives, the crankcase is open, and the bearing shells in the box do not match the reground journal sitting in front of you. This mismatch accounts for a large share of repeat teardowns in reciprocating compressor overhauls.

In the Shandong repair bays where I spent years pulling apart seized compressor blocks, the pattern was unmistakable. A crew would order the rod separately, assume standard-grade bearings, and discover during assembly that a previous rebuild had already taken the crankshaft undersize. The compressor sat disassembled while the correct shells were sourced [NEED_CITE: reciprocating compressor crankshaft regrind practices and undersize bearing availability].

Sometimes the rod itself survived, but the root cause—oil starvation from a blocked crankshaft passage or a failing pump—went unaddressed. Weeks later, the same unit returned to the bench with a scored journal and a bent rod. Matching the new connecting rod 97333173 to verified crankshaft dimensions and investigating the lubrication circuit prevents that cycle.

The Reciprocating Assembly Is a System, Not a Shopping List

The connecting rod 97333173 sits at the center of a tolerance stack that includes the piston pin, con-rod bearing shells, and crankshaft big-end journal. Changing the rod without verifying the entire stack invites oil-film breakdown at the journal. Each component in this assembly must be dimensionally confirmed as a matched set before the crankcase closes.

Oversize Grades and Serial Variants That Trap Rebuild Teams

SS5, SS5L5, and SS5N5 share the same base platform, yet internal clearances and bolt torque specifications diverge across serial ranges. If a prior overhaul reground the crankshaft, the bearing shells must match that undersize grade—never assumed standard. Ordering the connecting rod 97333173 without documenting the crankshaft's current journal diameter is the most common reason a rebuild stalls mid-assembly [NEED_CITE: Ingersoll Rand SS5 series compressor serial variant internal clearances].

Reading the Specs That Actually Matter on the Bench

The 40Cr forged steel body provides the fatigue strength needed for continuous heavy-duty compressor duty cycles, resisting the alternating tensile and compressive loads at the big end. The phosphate and oil coating serves a break-in function: it retains lubricant on the surface during the critical first minutes of operation before the splash oil circuit fully primes. The ±0.005 mm big-end bore tolerance ensures the honed bore pairs correctly with standard or undersize bearing shells to maintain the designed oil wedge. Surface hardness in the HRC 38–42 range balances wear resistance at the bearing interface with enough core ductility to absorb shock loading without crack propagation [NEED_CITE: forged steel connecting rod heat treatment and surface hardness standards for industrial compressors].

The Cost of Getting the Grade Wrong

Installing a standard-grade bearing on a reground journal guarantees metal-to-metal contact within hours. The resulting heat scores the crankshaft further, converting what was a rod-and-bearing job into a full crankshaft replacement or another regrind. Teams that skip the lubrication root-cause check often see the replacement rod fail within the same service window, because contaminated oil or a starved passage destroys the new bearing just as it did the original. These cascading failures turn a scheduled weekend overhaul into a multi-week outage.

Why Rebuild Teams Source This Rod Through Our Counter

We produce selected part lines in-house and source the remainder from qualified ISO-certified partners, so this connecting rod 97333173 carries the same QC and warranty terms regardless of production origin. Eight product categories mean your piston rings, gasket set, and bearing shells ship under one account on one consignment. Single-piece minimum order lets you replace one failed rod without padding a full set. Our technical team verifies serial-range fitment before dispatch, cross-referencing superseded numbers against your compressor's exact build. Samples are available for fitment confirmation before you commit to fleet quantities.

Documentation & Verification

• Commercial invoice listing connecting rod 97333173 with HS code for customs clearance
• Part compatibility sheet confirming SS5 / SS5L5 / SS5N5 serial-range fitment, marked reference only
• Dimensional inspection record covering big-end bore and pin bore tolerances
• Six-month warranty terms covering manufacturing defects in material and machining
• Pre-dispatch packing photographs showing rod surface treatment and protective wrapping

Installation & Rebuild Sequence

• Verify crankshaft journal diameter with a micrometer before selecting bearing shell grade
• Clean all oil passages in the crankshaft and rod with solvent and compressed air
• Assemble the connecting rod 97333173 with matched shells and confirm oil-film clearance with plastigauge
• Torque big-end bolts to the specification for your exact SS5 serial variant in the correct sequence
• Rotate the crankshaft by hand through several revolutions to confirm free movement before closing the crankcase
• Run the compressor under no-load conditions during break-in to allow phosphate coating to bed in

Requesting the Right Fitment Quote

Send your compressor model, serial number, and any known crankshaft regrind history. If the nameplate is illegible, a photograph of the existing rod and bearing shells allows our team to confirm the correct grade and variant. Include your full overhaul list so we can consolidate matching components into one shipment.

Frequently Asked Questions

Q: What other components should ship with a replacement connecting rod 97333173? A: A proper rebuild set includes matched con-rod bearing shells, piston pin, wrist pin bushing, and big-end bolts. Reusing fatigued bolts or mismatched shells with a new rod risks premature journal failure. We consolidate these into one consignment so nothing is missing when the crankcase is open.

Q: How do I determine if my crankshaft needs undersize bearings? A: Measure each crankshaft journal with a micrometer and compare readings against the OEM specification chart for your SS5 serial range. Any journal that was reground during a previous overhaul will require the corresponding undersize shell. Our team confirms the grade before your order ships.

Q: Do SS5, SS5L5, and SS5N5 use identical connecting rods? A: They share the base platform, but bolt torque values and internal clearances can differ across serial ranges. Providing your compressor serial number allows us to verify that connecting rod 97333173 matches your specific build variant before dispatch.

Q: What typically causes the original rod to fail? A: Most failures trace to lubrication starvation from blocked oil passages, contaminated oil, incorrect bolt torque, or bearing shell wear that went unchecked. Replacing the rod without addressing the root cause leads to repeat failure. We recommend a full lubrication circuit inspection during every rebuild.

Q: Can I order a single rod for an emergency repair? A: Yes. The minimum order is one piece. We dispatch from Guangzhou warehouse stock on common items and can arrange sample supply for fitment confirmation before you commit to a full overhaul kit for your fleet.