PORTER-CABLE PC750AG: problems, parts and running costs
Checked: 2026-10-30
Summary
A corded 4-1/2 inch (114 mm) angle grinder with a 7.5 A (837 W) motor and cast metal gear housing. The main documented issues are a guard that rotates on its own from vibration and cannot be locked, noise of about 98 to 114 dB SPL, and a prohibition on metal-cutting use. No current retail price or owner-reported failure rates were retrieved, so running-cost and value thresholds cannot be set from the sources read.
Common problems and fixes
- Guard rotates on its own and cannot be locked — the guard is not removable and rotates on its own from vibration, with no easy way to tighten it; PORTER-CABLE describes this as a safety feature for easy guard adjustment. [4]
- High noise — about 98 to 114 dB SPL depending on application, with the gear case the main source in free-wheel; hearing protection recommended. [4]
- Not for use as a metal-cut tool — PORTER-CABLE states the tool should not be used as a metal-cut tool; other models have guards designed for that application. [4]
- Accessory fit and prohibited wheels — Type 11 flaring cup wheels are prohibited; accessory rated speed must be at least equal to the tool’s maximum speed; spindle thread size is not published, so accessories must be verified to fit. [2]
- Unpublished specifications — no no-load RPM, weight or spindle thread size is published on the manufacturer page or in either manual. [1][2][3]
Parts and consumables
No replaceable parts or consumables reported.
Yearly running cost
Not enough data. [1][2][4]
When it is a good buy
No current retail price was retrieved. Historical context only: ToolGuyd reported in 2009 that the PC750AG was priced at $40 at Lowe’s as part of PORTER-CABLE’s then-new PC-prefixed line; that figure is not treated as a verified or present-day price. Value thresholds cannot be set from the sources read. For metal-cutting work, choose a grinder whose guard is approved for cut-off use; for approved grinding tasks, the documented strengths are the 7.5 A motor, cast metal gear housing and 3-year limited warranty with 1-year free service and 90-day money-back guarantee. [1][2][4][5]