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The Sunnen CRG-750 is a precision rod and cap grinder designed for surface-finishing of connecting rods, caps, bearing surfaces, small journals, and similar machined components. As a used grinder, this CRG-750 provides a cost-effective way for machine shops, rebuilders, or performance shops to add or expand rod/cap grinding capabilities without the investment required for new equipment.
This machine is ideal for rebuilding automotive or light-duty diesel engines, refreshing rod and cap surfaces, preparing bearing surfaces before assembly, or general rod-end finish work. Its manageable size and proven design make it a useful addition for shops doing rod/shaft rebuilds, small-batch engine builds, or maintenance work.
Precision Hardened Face Plate — Provides a flat, stable grinding surface that ensures accuracy and repeatable results, even under repeated use.
Compact, Shop-Friendly Footprint — Smaller than heavy-duty industrial grinders; suitable for smaller shops, rebuild shops, or mixed-use facilities.
Versatile for Rods, Caps, Journals & Small Parts — A flexible tool for various rod/cap sizes, bearing surfaces, small journal rework, or specialty machining tasks.
Durable, Shop-Duty Construction — Built with rugged components to withstand regular use; designed to handle rod/cap work without excessive vibration or wear when maintained.
Cost-Effective Used Equipment Option — Offers many of the benefits of new grinding equipment at a lower acquisition cost, making it ideal for shops expanding capacity or on a budget.
Simple Setup and Operation — Basic controls and straightforward clamping/fixturing make it accessible for experienced machinists and rebuilders without steep learning curves.
| Specification | Value |
|---|---|
| Model | Sunnen CRG-750 Rod & Cap Grinder (Used – Red) |
| Grinding Surface | Precision hardened face plate (factory-ground) |
| Typical Wheel Size | Ø ≈ 6″ (150 mm) — standard for CRG-750 series |
| Power Requirement | 115 V, single-phase (standard configuration) |
| Suitable Applications | Connecting rods, caps, bearing surfaces, small journal recuts, small parts resurfacing |
| Construction | Heavy-duty steel housing, vibration-dampening belt drive, robust build quality |
| Ideal For | Engine rebuild shops, rod/cap resurfacing, small-batch crank/rod work, performance shops, machine shops |
| Advantages | Precision grinding, compact footprint, versatile, affordable used-equipment option |
| Limitations | Not intended for heavy industrial crankshafts or oversized rods — best for light-to-medium work |
Tell us what you need, and we’ll send you a quick and accurate estimate — no hidden fees, no obligations.
We make equipment decisions easy. Clear answers, accurate recommendations, and support from people who know the industry.
When you reach out, you get answers quickly - not generic replies.
Backed by 50+ years in engine machining and reconditioning.
No surprises, no unclear timelines.
Your machine’s long-term performance is our priority.
Decades before today’s engine shops trusted our equipment, Tony was already deep in the craft — rebuilding motors, machining blocks, and pushing for better precision.
A local newspaper once featured him as a standout young machinist, noting his drive, attention to detail, and obsession with doing things the right way. That same passion would eventually shape our company’s values.
Today, that commitment lives on in every machine we sell, every customer we support, and every shop we help succeed.