1317192C1 Sprocket — Direct Replacement for Case-IH

1317192C1 Sprocket — 9-Tooth Replacement for Case-IH Combine Grain Auger Drive

The 1317192C1 sprocket is a direct-fit replacement for Case IH combine clean grain auger drives, covering 9 teeth, a 35 mm bore, and a 41.4 mm pitch CA550-compatible profile. It fits both upper and lower auger positions on eleven combine models across the 1600 and 2300 series, plus the lower position on the 1682 and upper on the 2188/2388. Teeth are hobbed to tolerance and quench-hardened, with a corrosion-resistant coating for off-season

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1317192C1 Sprocket — Direct Replacement for Case-IH

1317192C1 Sprocket — Direct Replacement for Case-IH Combine Grain Handling Systems

OEM Part Number: 1317192C1  |
Cross Ref: A-1317192C1 / SP122 / SP122H  |
Teeth: 9  |
Shaft: 1-1/4″ (35 mm bore)  |
Weight: 1.5 kg

The 1317192C1 sprocket is a hardened aftermarket replacement for Case-IH combine clean grain auger drives. It fits both the upper and lower clean grain auger positions on eleven combine models in the 1600 and 2000 series, plus the lower auger position on the 1682 and the upper auger on the 2188 and 2388. The 9-tooth, 41.4 mm pitch profile engages the elevator chain with the same geometry as the original, so installation requires no modification to the shaft or housing.

Worn or cracked drive sprockets accelerate chain stretch and increase the risk of grain elevator jams at peak throughput. Replacing this component at the first sign of tooth-tip hooking — rather than waiting for chain skip — extends chain service life and avoids unplanned stoppages during harvest. This part is also listed for the Case-IH 2144 Forage Harvester, covering a second machine type from the same SKU.

Technical Specifications of 1317192C1 Sprocket for Case-IH

ParameterUnitValue
OEM Part Number—1317192C1 (also: A-1317192C1, SP122, SP122H)
Number of Teeth (Z)—9
Pitch (p)mm41.4
Inner Diameter (d) / Shaft Sizemm / inch35 mm / 1-1/4″
Outer Diameter (D)mm132
Outside Hub Diameter (D1)mm50
Height (H)mm57
Key Slotmm4 × 8 × 57
Weight (W)kg1.5
Hardness—Teeth hardened (HRC selectable)
Surface Coating—Anti-corrosion coating applied to outer surfaces
Application Position—Upper & Lower Clean Grain Auger / Lower Clean Grain Auger / Upper Clean Grain Auger (model-dependent)

Key Features of This Replacement Drive Sprocket

Hardened Tooth Profile

Teeth are heat-treated after hobbing, producing a hard wear surface over a tough core. This resists the cyclic impact loads typical of grain elevator duty, where chain tension spikes each time a loaded flight engages the conveyor sprocket.

Precision Key-Slot Machining

The 4 × 8 × 57 mm keyway is broached to tolerance after bore machining, keeping the sprocket concentric on the 1-1/4″ shaft. Shaft runout caused by a sloppy keyway fit is a common source of premature chain wear that this process eliminates.

41.4 mm Pitch Accuracy

Pitch is held within tight CNC hobbing tolerances across all 9 teeth. Mismatched pitch between a replacement sprocket and a used chain is the fastest route to accelerated wear — a dimension-verified part prevents this.

Corrosion-Resistant Outer Coating

The outer surface carries a protective coating that resists oxidation during off-season storage. Grain dust mixed with moisture is highly corrosive to bare steel — the coating keeps surface pitting from spreading to functional tooth faces.

OEM Quality Sprocket for Case-IH Aftermarket Parts

Every unit is dimensionally verified against the 1317192C1 drawing before dispatch. Bore, pitch, outer diameter, and key-slot dimensions are checked as a set — not sampled — ensuring no out-of-tolerance parts reach the field.

Dual-Position Fitment

One part number covers both upper and lower auger positions on most listed models, simplifying procurement. Stocking a single SKU reduces parts-room complexity for dealers and fleet operators servicing mixed Case-IH fleets.

Compatibility: Fits Your Case-IH Combine Models

Confirm your model below before ordering. Position fitment (upper auger, lower auger, or both) varies by model as noted.

ModelApplication PositionMachine Type
1640, 1644, 1660, 1666, 1670, 1680, 1688Upper & Lower Clean Grain AugerCase-IH Combine
2144, 2166, 2344, 2366Upper & Lower Clean Grain AugerCase-IH Combine
1682Lower Clean Grain Auger onlyCase-IH Combine
2188, 2388Upper Clean Grain Auger onlyCase-IH Combine
2144—Case-IH Forage Harvester

Model not listed? Send your machine serial number and we will cross-reference it against the 1317192C1 specification within one business day.

Superior Performance in Grain Handling Applications

Superior Performance in Grain Handling Applications

The clean grain elevator is one of the highest-duty chain drives on a combine. At full capacity, the elevator chain runs continuously under variable load as the clean grain volume fluctuates. A drive sprocket with worn teeth or a loose bore fit allows chain pitch to drift, which eventually causes the chain to ride over tooth tips rather than seating in the root — a condition that generates heat, accelerates wear on both parts, and risks a complete chain break.

  • Tooth hardening reduces flank wear rate compared to non-hardened steel. In continuous-duty grain elevator service, hardened teeth maintain their profile geometry through a full harvest season rather than rounding off mid-season.
  • Matched pitch eliminates skip risk. The 41.4 mm pitch is dimensionally verified to match the elevator chain, keeping the chain seated in the tooth root at every engagement point.
  • 132 mm outer diameter and 57 mm hub height match the housing clearances on listed models, preventing rubbing or interference that would add drag to the drive and increase chain tension.
  • Replacing sprocket and chain together at the same service interval is the recommended practice. A new chain on a worn sprocket — or a new sprocket on a stretched chain — results in uneven contact and re-wear within 50 operating hours.
  • Forage harvester compatibility on the 2144 means the same part serves two machine types, allowing dealers to consolidate inventory across mixed fleets.

Frequently Asked Questions

Q1: Does this sprocket fit both the upper and lower clean grain auger on all listed models?

Not on every model. It fits both positions on the 1640–2366 series, lower only on the 1682, and upper only on the 2188 and 2388. Check the compatibility table above for your specific model before ordering.

Q2: Is this an OEM quality sprocket for Case-IH aftermarket use?

Yes. The part matches the 1317192C1 drawing on all key dimensions — 9 teeth, 41.4 mm pitch, 35 mm bore, 4×8×57 mm keyway — and receives the same hardening process as the original.

Q3: Should I replace the elevator chain at the same time?

Strongly recommended. Installing a new sprocket on a worn chain causes accelerated re-wear on the new part. We supply matching elevator chains — contact us with your chain pitch and strand count for a paired quote.

Q4: What cross-reference numbers does this part cover?

This unit replaces OEM numbers 1317192C1, A-1317192C1, SP122, and SP122H. If your parts catalogue lists any of these, this is the correct replacement.

Q5: How do I know when the conveyor sprocket needs replacing?

Inspect tooth tips for a hooked or sharpened profile, check for visible wear grooves on flanks, and listen for chain skip under load. Any one of these signs indicates the sprocket should be replaced at the next scheduled maintenance window.

Frequently Paired Products

A grain elevator sprocket works as part of a complete chain drive assembly. The components below are typically ordered or replaced at the same service interval:

Clean Grain Elevator Chain

41.4 mm pitch roller chain for Case-IH elevator assemblies. Replace chain and sprocket together to avoid uneven contact wear.

PTO Drive Shaft

Telescoping PTO shafts with overrun clutch protection for combine and header power take-off connections.

Idler Sprockets

Matching idler sprockets for the same elevator chain loop, available in the same material and coating specifications.

Ready to Order? Need a Bulk Quote or Custom Spec?

Send us your Case-IH model number, required quantity, and any custom specifications. We confirm price and availability within one business day.

We also supply a full range of agricultural and industrial components —
Agricultural Gearboxes,
Hydraulic Cylinders,
PTO Shafts,and
Drive Sprockets for all major combine brands —
all available for direct export with B2B volume pricing.


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