What Is A Foley-Belsaw 347 Sharpener (Wheel Specs)
The Foley-Belsaw 347 is a bench-mounted chain sharpener, not a chainsaw. Wheels commonly listed for Foley-Belsaw chain sharpeners measure 5¾ inches across, ⅛ inch thick, with a ⅞-inch arbor. Treat those as dimensions to check, not guaranteed Model 347 specifications. Confirm fit, wheel profile, and speed rating against your machine before buying or running a wheel.
A wheel can look right in a listing and still be unsafe for your sharpener. The key is to check more than its diameter: thickness, center hole, profile, and speed rating all matter. I explain those checks below so you can identify the right wheel without guessing or relying only on a seller’s “fits Model 347” claim.
What is a Foley-Belsaw 347 sharpener?
The Foley-Belsaw Model 347 is a machine for sharpening chainsaw chains. It holds a chain in a vise while a rotating grinding wheel shapes the cutters. It is not a chainsaw powerhead, and its wheel requirements are separate from the requirements for a chainsaw bar or engine.
A chain sharpener removes a small amount of metal from each cutter to restore its cutting edge. The chain stays in the machine’s holder as you position each cutter for grinding. A wheel that fits the spindle is only one part of the setup: the wheel’s shape and your machine settings must also suit the chain.
This is why terms such as pitch and cutter style matter. Chain pitch describes the spacing of the chain’s drive links. Cutter style and dimensions affect the shape the wheel must produce. The sharpener’s adjustments help set the grinding angle and depth. Bar length, engine size, fuel mixture, and cutting torque do not determine whether a wheel fits the 347.
What are the Foley-Belsaw 347 wheel specs?
Wheel dimensions commonly specified for Foley-Belsaw chain sharpeners are 5¾ inches in outside diameter, ⅛ inch thick, and a ⅞-inch arbor. These are a starting point for checking a replacement, not confirmed specifications for every Model 347. Verify the machine and wheel before use.
| Wheel detail | Commonly listed dimension or requirement | What to verify |
|---|---|---|
| Outside diameter | 5¾ in. | Check the Model 347 manual, machine label, or existing wheel |
| Thickness | ⅛ in. | Match the wheel to the chain and cutter profile |
| Arbor, or center hole | ⅞ in. | Confirm the spindle and wheel bore fit correctly |
| Maximum wheel speed | No single value stated here | The wheel’s marked maximum RPM must be at least the spindle RPM |
| Wheel profile | Depends on the chain and setup | Use a chainsaw-chain grinding wheel and dress it to the cutter shape |
Arbor means the hole in the wheel that fits over the spindle. Outside diameter is the full width of the wheel from edge to edge. A wheel with the right diameter but the wrong arbor or thickness is not a suitable replacement.
How do diameter, thickness, and arbor affect fit?
These three measurements describe whether the wheel can mount and clear the machine. Diameter affects clearance inside the guard and around the chain vise. Thickness affects how the wheel contacts the cutter. Arbor size must match the spindle; do not rely on a loose fit or an improvised spacer.
Measure only when the machine is unplugged and the wheel is safe to handle. If the old wheel is worn, damaged, or marked with unclear numbers, do not treat its size as proof of the correct factory specification. Check the Model 347 manual or machine label, then compare the replacement wheel’s own dimensions.
Why do speed rating and wheel profile matter?
The wheel’s maximum RPM is its stated limit for rotation speed. It must be at least as high as the sharpener’s spindle speed. The profile is the wheel’s working shape, which must suit the chain cutter. A wheel can match the machine’s dimensions and still be unsafe or grind the wrong shape.
Find the spindle RPM on the sharpener’s label or in its manual, then read the maximum RPM marked on the wheel. If either value is missing or cannot be read, do not run the wheel until you can verify both. Never use a wheel rated below the spindle speed.
A wheel profile is not the same as wheel thickness. Dressing is the process of shaping or refreshing the wheel’s working surface. Follow the chain maker’s sharpening guidance and the sharpener’s instructions for the right cutter geometry. Do not assume that every ⅛-inch wheel has the right profile.
How do you verify a replacement wheel?
A safe wheel check compares the machine, wheel, and chain rather than relying on a product title. Read the machine’s own information, inspect the wheel markings, and check the mounted wheel by hand before switching on the sharpener. If a key measurement or speed rating remains uncertain, pause and confirm it first.
Use this step-by-step check before purchase or installation:
- Identify the sharpener. Confirm that the machine is a Foley-Belsaw Model 347. Find its manual or identification label, and record any wheel or spindle details.
- Check the dimensions. Compare outside diameter, thickness, and arbor size with the manual, label, or a reliable measurement of the spindle and wheel.
- Check the RPM ratings. The wheel’s marked maximum RPM must equal or exceed the spindle RPM. Do not estimate either number.
- Check the wheel type and profile. It must be intended for chainsaw cutter grinding and suitable for the chain and cutter shape.
- Inspect the wheel. Do not use a cracked, damaged, or otherwise questionable wheel. Follow the wheel maker’s inspection guidance.
- Confirm clearance. With the machine unplugged, rotate the mounted wheel by hand. It must clear the guard, chain, and vise without contact.
The wheel label and the sharpener’s own documentation take priority over a seller’s fit claim. If the label is gone and the manual does not resolve the spindle speed or dimensions, ask a qualified service source to identify them rather than testing an unknown wheel at operating speed.
How should you install and check the wheel?
Install or inspect the wheel only with the sharpener unplugged. The guard must cover the wheel as designed, and mounting parts must hold it securely. After installation, check for free movement and clearance by hand before applying power. These checks reduce the risk of contact, damage, or a wheel failure.
What should you check before switching on?
First, inspect the wheel for cracks or damage. Then check the mounting hardware, flanges, guard, vise alignment, and power cord. Make sure the wheel is secured as the machine instructions specify. Rotate it by hand and confirm it does not touch the guard or work-holding parts.
When sharpening, clamp the chain securely and keep the guard in place. Use light, controlled contact rather than forcing the cutter against the wheel. Keep hands clear of the wheel and chain, wear eye protection, and avoid loose clothing. Do not grind on the wheel’s side face unless the wheel is specifically rated for side loading.
Stop the machine if you notice vibration, unusual noise, guard contact, or a damaged wheel. Do not continue in the hope that the problem will go away. A cracked, incorrectly mounted, or over-speed wheel can fail at operating speed and cause severe injury.
What do wheel-fit examples look like?
These examples are checks, not reports of specific Model 347 installations. They show why a seller’s claim or a matching dimension cannot settle every part of the question. In each case, the machine’s own specifications and the wheel’s markings determine whether it is safe to proceed.
- A listing says “5¾ × ⅛ × ⅞.” The dimensions match the commonly listed size, but the spindle speed and wheel RPM rating are unknown. Do not run it until both speeds are verified.
- The wheel fits the spindle, but the guard rubs. Do not use it. Check the wheel size, mounting, and machine parts; hand rotation should show clear space around the wheel.
- The wheel’s speed label is unreadable. Do not assume the wheel is suitable because it looks new or fits. Get a wheel with a legible rating that meets or exceeds the verified spindle RPM.
- The dimensions and speed check out, but the cutter grind looks wrong. Recheck the wheel profile and sharpener settings against the chain maker’s guidance. Dimensional fit alone does not confirm the correct grinding shape.
How do you maintain and store a Model 347 wheel?
Wheel and machine care starts with inspection and clean storage. Unplug the sharpener before cleaning, dressing, or checking the wheel. Keep the wheel dry and protected from impact, and inspect guards, flanges, mounting parts, vise alignment, and the cord regularly. Replace damaged parts instead of working around them.
A wheel may need dressing when its working profile becomes inaccurate or its surface becomes glazed. Follow the sharpener and wheel instructions for dressing. Keep grinding contact light to help avoid overheating the cutters, and use the chain maker’s specifications for sharpening settings.
After use, unplug the machine and clear away grinding dust. Store the wheel where it cannot be dropped, struck, or exposed to moisture. Keep the manual, machine identification, spindle-speed information, and wheel markings together. That makes the next replacement check easier and safer.
What is the safest way to choose a Model 347 wheel?
Treat 5¾ × ⅛ × ⅞ inches as a commonly listed size to verify, not a guaranteed specification for every Model 347. Confirm diameter, thickness, arbor, profile, and RPM rating against the machine and wheel labels or manual. If any safety-critical information is missing, do not install or run the wheel until it is verified.
The most useful next step is to find the machine label and manual, then compare them with the replacement wheel’s markings. Do not buy or install a wheel based only on “Foley-Belsaw 347” in a listing. Fit, profile, and rated speed all need to check out.
Foley-Belsaw 347 wheel-spec FAQ
These short answers cover the main checks when identifying a replacement wheel. The commonly listed dimensions can guide your search, but they do not replace the Model 347’s documentation or the wheel’s own markings. When details are missing, verify them before use.
What size wheel is commonly listed for a Foley-Belsaw chain sharpener?
A commonly listed size is 5¾ inches in diameter, ⅛ inch thick, with a ⅞-inch arbor. Confirm the Model 347’s requirements before purchase.
Are those dimensions confirmed for every Model 347?
No. Check the specific machine’s manual or label and verify the wheel’s actual measurements. Do not assume every Model 347 setup is identical.
What does ⅞-inch arbor mean?
It means the wheel’s center hole measures ⅞ inch across. That hole must match the sharpener’s spindle as specified by the machine maker.
What wheel RPM rating do I need?
The wheel’s marked maximum RPM must be at least the sharpener spindle’s RPM. If either value is missing or unreadable, do not run the wheel.
Can I use any wheel that fits the spindle?
No. It also needs the correct dimensions, speed rating, and profile for chainsaw cutter grinding and the chain being sharpened.
Does chain pitch affect wheel fit?
Pitch does not set the spindle or arbor size. It is one factor in choosing the cutter-grinding profile and sharpener settings.
Can I use the wheel’s side to grind a cutter?
Only if the wheel is specifically rated for side loading. Otherwise, do not grind on its side face.
What if the wheel touches the guard when turned by hand?
Do not power on the sharpener. Check the wheel, mounting, and machine parts, and correct the clearance problem before use.
Can I use a wheel with a crack or damaged edge?
No. Do not run a cracked or damaged wheel. Replace it with a verified wheel that meets the machine’s requirements.
What should I do if the old wheel has no readable label?
Use the machine manual or label to verify dimensions and spindle speed, then choose a wheel with readable specifications. If you cannot verify a key value, do not run it.
(This article was written by one of our staff writers, Evan Bradley. Visit our Meet the Team page.)
