How does shipping work for orders on MRO Exchange?

Most orders ship within 1–2 business days via UPS. Larger equipment ships via freight carrier, and customers can use the shipping estimator on the product page for a location-specific quote. Local pickup is also available at the Fairfield, IL facility, typically ready within 4 hours.

What payment methods does MRO Exchange accept?

MRO Exchange accepts all major credit cards, PayPal, and Shop Pay. Purchase order and wire transfer payment is also available, with payment due prior to shipment. Custom terms are available for established accounts.

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Giddings & Lewis Machine Control Board 501-04302-00

$1,999.00 USD

Sale Sold out

ConditionSurplus - Untested MPN501-04302 Stock #0226-00569

Photos reflect current condition. Items differing from description may be eligible for return or refund — see our condition guide.

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Estimated package weight: 5.0 lbs

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A large-format CNC machine control PCB assembly silkscreened "MACHINE CONTROL BOARD," carrying part number 501-04302-00 with secondary assembly reference 503-19030-00. The date code on the board reads 6/88, placing manufacture in June 1988. The board features a densely populated layout with dual KM6264AL-10 SRAM memory ICs, multiple rows of 28-pin DIP logic devices, address and data bus routing, and IO-PASS and IO-FAIL diagnostic indicators silkscreened at the board edge. Two multi-pin gold-finger edge connectors are present, one at the left side and one at the lower left, consistent with a backplane-mounted card architecture typical of late-1980s CNC control systems. A blue ribbon connector block is also visible, along with socketed ICs throughout. The reverse side shows a through-hole solder point matrix and multilayer trace routing. No manufacturer name or logo is visible in any of the provided photos. Part number 501-04302-00 is the primary identifier as labeled on the board silkscreen. This board is suited for buyers maintaining or restoring CNC equipment that uses this specific part number or compatible machine control card assemblies from this era.

Stock # 0326-569

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Frequently Asked Questions

Shipping & Handling

Most orders ship within 1–2 business days via UPS, but expedited same-day handling is available as an add-on to orders in cart. Larger equipment ships via freight carrier. Use the shipping estimator above for a location-specific quote. Local pickup is also available at our Fairfield, IL facility, typically ready within 4 hours.

Returns & Condition

All items are sold as-described based on the photos and condition listed. If an item arrives differing from its description, it may be eligible for return or refund. See our full condition guide for details on our grading terms.

Payment Options

We accept all major credit cards, PayPal, and Shop Pay. Purchase order and wire transfer payment is also available by selecting "Purchase Order / Wire Transfer" at checkout. Payment is due prior to shipment. Contact us for custom terms on established accounts. Tax exemptions are honored if proper documentation is provided.