The Model 1790 Tachometer Tester is used for testing and calibration of electrical and mechanical tachometer generators and indicators. A high-quality DC motor is coupled directly to a 1/4-inch square hole drive (AN Pad). This tachometer tester output can be converted to a wide variety of adapters and different tachometer interfaces. The motor drive control circuit uses SCR components and an open loop system for an economical solution to speed adjustment. The control panel consists of a five-digit LED display, momentary switches for start and stop, a direction switch, a display select switch, and a ten-turn potentiometer for speed adjustment.
Version (MFR# 230020-7) includes a RPM readout and operates on 230 VAC.
- 250 - 10,000 RPM Tachometer Testing Range
- 250 - 5,000 RPM Actual Drive Speed
- 1 RPM Accuracy of Digital Display
- Bright Red 5-Digit Display
- Maximum Torque: 60 oz-in
- Low Cost
- direct-drive
- Bi-directional
- Ten-turn Speed Adjustment
- Optional Calibration Kit Available
Product Codes | |
|---|---|
| Mfr Part No: | 230020-7 |
| ECCN: | 7B994 |
| SCHEDULE B CODE: | 9031.80.8080 |
Weight: 36 lbDimensions: 12.7 x 12 x 8.1 inDrive type: Permanent magnet DC motorMaximum torque: 60 oz-in.Drive outlet: 1/4 inch square hole (AN Pad)Shaft speed range: Infinitely variable within 250 - 5,000 RPM bi-directionalIndicator speed range: 250 - 5,000 RPM (1x setting) 500 - 10,000 RPM (2x setting)Operating temperature: 40º to 90º F (4º to 32º C)
- Stock: Out of Stock - On Backorder
- Manufacturer Part #: 230020-7
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Returns & refund summary
- 30-day return window — with prior return authorization, unopened in original packaging.
- Restocking fee: 20% on unopened items, 30% on open-box items.
- Refund processing fee: 5.51% applies to all refunds (returns, cancellations, core-fee refunds) regardless of reason.
- Return shipping: paid by buyer.
- Non-returnable categories: installed/used parts, special-order or rebuilt items, programmed items (incl. ELTs), batteries, AOG-priority orders, international orders.
Full terms: Return Policy.
Authenticity & authorization
All parts sold by American Aviation Parts are genuine factory products sourced through authorized distribution channels. Our authorization status varies by brand — for some brands we are a direct authorized dealer; for others we are an independent reseller through authorized distribution. Either way, the part you receive is the same factory product, with standard documentation available on request.
See our full Manufacturer Authorizations page for the current per-brand status.
Need traceability paperwork?
If your installation requires FAA Form 8130-3, manufacturer Certificate of Conformance, or other traceability documentation, please call 1-877-722-8727 or email [email protected] before placing the order so we can confirm what is available for this part.
Shipping
Standard ground, expedited, and AOG shipping options are available at checkout. Full shipping-cost tiers and timelines are published on our Delivery Information page.
