Which pumps does this clamp fit?

It is listed for the Kerr KM-3250PT, KMX-3300SHPT and T30M models. Confirm your pump model before ordering.

What does this clamp do?

It connects the pony rod to the piston rod. The pony rod extends between the crosshead and the piston rod, transmitting the reciprocating motion that drives each pumping stroke; this clamp secures that joint.

What part number does this replace?

It is an aftermarket replacement for Kerr part number KM-280. The brand and part number are listed for identification only and do not indicate OEM manufacture.

Clamp Pony Rod to Piston Rod

Clamp Pony Rod to Piston Rod — Piston Rod aftermarket replacement part

This is a clamp that joins the pony rod to the piston rod in Kerr reciprocating pumps, fitting the KM-3250PT, KMX-3300SHPT and T30M models. It sits in the rod train between the power end and the fluid end, where the pony rod extends from the crosshead to the piston rod that drives each pumping stroke. It is offered as an aftermarket replacement part that interchanges with Kerr part number KM-280. Approximate weight is about 2.40 lb.

What it is

A piston rod connects the crosshead in the power end to the piston in the fluid end, transmitting the reciprocating motion that drives each pumping stroke.

Pump compatibility

KM-3250PT
KMX-3300SHPT
T30M

Specifications

Property	Value
Weight	2.40 lb (≈ 1.09 kg, converted)

Manufacturer technical notes

Clamp Pony Rod to Piston Rod (SKU: KM-280) API 7K-certified forged 35CrMo alloy steel (tensile strength ≥980MPa) with precision machining tolerance ±0.01mm, phosphated anti-corrosion coating (ASTM B117 700h), compatible with F500/F800/F1300 mud pumps, clamping force ≥50kN, paired with self-lubricating bronze bushings for reduced wear。

Verbatim from the Dongli product page on dlhddrilling.com.

Replacement / interchange

Aftermarket replacement cross-referencing Kerr KM-280.

FAQ

Which pumps does this clamp fit?: It is listed for the Kerr KM-3250PT, KMX-3300SHPT and T30M models. Confirm your pump model before ordering.
What does this clamp do?: It connects the pony rod to the piston rod. The pony rod extends between the crosshead and the piston rod, transmitting the reciprocating motion that drives each pumping stroke; this clamp secures that joint.
What part number does this replace?: It is an aftermarket replacement for Kerr part number KM-280. The brand and part number are listed for identification only and do not indicate OEM manufacture.

Related parts

See all Piston Rod →

All brand names, model numbers and part numbers are used for identification and cross-reference only and do not imply original-equipment manufacture. This is an aftermarket replacement part.

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