The FEIN JMC Magforce 90 drill capacity is listed as up to 1-7/16 inches for a cutter on FEIN’s product page. Several retailer and product listings give a 1-3/8-inch maximum instead. [1][2][3][4] It also helps to read FEIN JMC Magforce 90 vs Portable Drill: Which Fits?
For a planned hole, treat those figures as listing guidance, not a promise that every cutter or setup can make that size. The practical limit depends on the cutter and configuration, so check the specifications for the exact model and accessory before you commit to the job.
Read the capacity as a cutter limit
The capacity figures describe the cutter size, not a guarantee that a hole of that diameter is suitable for every workpiece. For example, a planned 1-3/8-inch opening falls within the number repeated by several listings, while 1-7/16 inches is the higher figure shown on FEIN’s product page. [1][2][3][4] Match the figure to the cutter you intend to use rather than assuming the drill’s listed maximum applies across all accessories.
This distinction is useful when you are choosing a cutter for a specific fabrication task. A hole that falls below one listing’s maximum can still exceed the rating of the cutter or arrangement you actually have. Check the tool and accessory details together, and use the specifications for that exact combination to decide whether it fits your planned hole.
Use the exact configuration for the final check
Before purchasing a cutter or setting up the job, identify the exact JMC Magforce 90 model and the accessory you plan to pair with it. Then compare their stated limits with the hole diameter you need. If the job depends on reaching the largest listed size, verify the exact capacity rather than relying on a general product description.
That simple check helps you avoid choosing a cutter based on a number that belongs to a different listing or configuration. Keep the hole size and the cutter’s rated capacity together when you plan the work; don’t treat the headline capacity alone as approval for every setup.
Why do capacity listings show different numbers?
Listings differ because they describe the JMC Magforce 90’s capacity in different ways, so treat each number as tied to the stated cutter or setup rather than as a universal limit. FEIN’s product page gives a maximum cutter capacity of 1-7/16 inches, while a retailer lists drilling capacity up to 1-3/8 inches and another listing specifies a 1-3/8-inch HSS cutter maximum. [1][2][3] Learn more in FEIN JMC Magforce 90: What This Compact Mag Drill Does.
Those descriptions do not tell you that every cutter can make a hole at the largest figure. For example, the 1-3/8-inch HSS listing names a cutter type, while the FEIN page uses the broader phrase “cutter capacity”; the figures are not necessarily describing identical cutter-and-tool combinations. [1][3] Avoid choosing a cutter based only on the biggest number you find in a product headline.
Before you buy a cutter or start a job, match its stated capacity to the exact JMC Magforce 90 model and accessory combination you plan to use. If one listing says 1-7/16 inches and another says 1-3/8 inches, do not treat the difference as extra capacity you can automatically use. Check the exact specifications for the tool and cutter, and ask the seller or manufacturer to clarify if those specifications do not match. For more detail, see How to Use FEIN JMC Magforce 90 Safely.
This is especially useful when a job calls for a hole close to a listing’s maximum. For instance, if your plan depends on a cutter at the upper end of the stated range, confirm that the specific cutter is approved for your drill before buying or drilling. A product-page headline alone is not enough to establish that a particular setup can make that hole.
What should you check before drilling?
Before drilling, confirm that your planned hole, cutter, workpiece, and setup all fall within the limits for your specific JMC Magforce 90 configuration. The tool’s listed cutter capacity is only one part of that check; it does not by itself confirm that every cutter or workpiece is suitable. [1]
Match the hole to the cutter
Write down the hole diameter you need, then compare it with the capacity approved for the cutter you plan to use. For example, if your drawing calls for a hole larger than the cutter’s stated limit, stop and choose a compatible cutter and setup rather than assuming the drill’s headline capacity covers it.
Check the cutter packaging or specification sheet, not just the drill listing. A cutter may have its own limits, so confirm its permitted diameter and any workpiece conditions before you mount it. Also check the drill’s manual for setup and workpiece limits; a job that fits the cutter diameter can still fall outside the tool’s instructions.
Confirm the setup before a maximum-size cut
If your work depends on the largest size shown in a listing, ask FEIN or the seller to confirm that size for your exact tool and cutter combination. Give them the model and cutter details, and describe the workpiece and setup you intend to use. That gives you a concrete answer to check against the manual and cutter specifications before committing to the cut.
Keep the specifications for the actual cutter beside the manual while you plan, and do not proceed if the details do not clearly cover your job.
How to choose the right capacity
Use the capacity specified for your exact cutter and drill setup, and keep the planned hole at or below that limit. Several listings give the JMC Magforce 90 a 1-3/8-inch capacity, but treat that as a figure to verify against the configuration you’ll use. [2] [3] [4]
Match the cutter to the job
Before choosing a cutter, write down the hole diameter your job requires and compare it with the capacity stated for that cutter and drill combination. For example, if the listing for your specific setup specifies a 1-3/8-inch maximum, do not plan a larger hole with that setup. [2]
A model name alone is not enough to confirm the limit: listings describe capacity alongside different cutter details, including HSS cutter capacity. [3] Check the product or accessory specification for the exact cutter you intend to use, rather than carrying a capacity figure over from another listing. [3]
If you are ordering a cutter for a job, confirm its stated maximum before you buy; if you already have the cutter, check its marked or documented specification before drilling. Use the lower stated limit if the cutter and drill specifications differ, and do not proceed with a hole larger than the capacity specified for your particular cutter and drill.
For a job close to the stated maximum, verify the exact configuration with the seller or FEIN before committing to the cut. The practical takeaway is simple: size the job to the confirmed capacity, not to a number remembered from a different listing. [2]