36865012 Ingersoll Rand OEM Coupler

The 36865012 Ingersoll Rand OEM drive coupler is the OEM-issued coupling element used in Ingersoll Rand portable rotary screw air compressors. It transmits torque from the drive motor to the airend, compensates for minor angular and parallel misalignment, isolates vibration, and protects bearings, seals, and shafts from torsional shock.

Key features and benefits

• OEM-issued Ingersoll Rand part for portable rotary screw airend assemblies
• Elastomer flex element absorbs torsional shock and damps vibration
• Steel hub construction sized for industrial-duty service
• Lubrication-free design with no service ports or grease intervals
• Direct fit replacement that restores factory balance and alignment behavior

Functional design and performance

The 36865012 links the drive motor to the compressor airend through a flexible elastomer interface. The element absorbs torsional pulsations from the engine and isolates vibration before it reaches the airend bearings. By accommodating small parallel and angular shaft offsets, the coupler reduces stress on rotating assemblies and stabilizes compressor performance across varied load cycles.

Applications and compatibility

The 36865012 is the OEM drive coupling for the Ingersoll Rand P-series portable rotary screw air compressor family. The Ingersoll Rand factory parts manual (book 22442842, page A-79) documents 36865012 as the drive coupling on the P185 airend assembly, and the part is used in related small-portable variants including the John Deere-powered P185WJD trim.

The Ingersoll Rand small-portable line uses several drive coupling part numbers across model years, airend revisions, and engine options. Because of this, confirm 36865012 against your machine’s parts manual, the unit’s serial-number plate, or by calling Stark Industrial Products at (903) 768-1111 with the unit’s serial number for fitment verification before ordering.

Important fitment note: The 36865012 fits the Ingersoll Rand P185 airend. It does NOT fit the XP185, which uses Ingersoll Rand part 22314348. Verify your model designation, including any X prefix, before ordering.

Technical specifications

• Manufacturer part number: 36865012
• Description: Drive coupling, flex element
• Element type: Elastomer
• Hub material: Steel
• Lubrication: None required
• OEM application: Ingersoll Rand portable rotary screw airend assembly (P185 family documented in factory parts manual book 22442842)

Installation overview

Verify shaft and bore are clean and burr-free, and inspect key seats for wear or damage. Align driver and driven hubs to the manufacturer’s parallel and angular limits. Seat the elastomer element fully into both hub jaws and torque mounting hardware to specification in a cross pattern. After start-up, confirm vibration falls within baseline and re-check fasteners after the first hours of operation.

Why Ingersoll Rand OEM matters

The 36865012 is the part number issued by Ingersoll Rand for portable rotary screw airend assemblies. An OEM-issued coupler is sized and balanced to the airend it serves. Using the OEM part keeps the rotating assembly within factory balance limits, supports the engine-to-airend torsional model the compressor was designed around, and maintains warranty alignment on covered assemblies.

Why buy from Stark Industrial Products

Stark Industrial Products is an OEM drive coupler supplier for air compressors, drilling rigs, pumps, and tractors. Orders for in-stock 36865012 couplers ship the same day. The phone line at (903) 768-1111 is staffed 24/7 for parts identification and order placement.

Frequently asked questions

What Ingersoll Rand models does the 36865012 drive coupler fit?

The 36865012 is the OEM coupling element for the Ingersoll Rand P185 portable rotary screw air compressor and is documented as the drive coupling on page A-79 of factory parts manual book 22442842. Fitment extends to related variants in the P-series small-portable family, including the P185WJD John Deere trim. Because this product line uses several drive coupling part numbers across model years and engine options, confirm fit against your machine’s parts manual or call Stark Industrial Products at (903) 768-1111 with the unit’s serial number.

Does the 36865012 coupler fit the XP185 air compressor?

No. The Ingersoll Rand XP185 airend uses a different drive coupling, part number 22314348. Verify your machine’s exact model designation, including the X prefix, before ordering.

Does this drive coupler require lubrication?

No. The elastomer element is a lubrication-free design and runs in a dry installation. Inspect the element during scheduled compressor maintenance for cracking, hardening, or chunking.

How long does the 36865012 coupling element last?

Service life depends on duty cycle, ambient temperature, and alignment quality. Replace at the first sign of elastomer cracking, hardening, or loss of torsional response, or as a preventive item during airend service intervals.

Does Stark Industrial Products ship same-day?

Yes. In-stock units ship the same day. Stark Industrial Products operates 24/7 and can be reached at (903) 768-1111.