Quick answer: Compare documented MT1/MT2 compatibility, speed controls, swing and working length without invented rankings or “tested” ratings.

Independent technical guidance based on the sources linked below. No hands-on equipment testing is claimed.

What matters most for pens

Do not mistake a product title with “variable speed” for an automatically correct speed for every stage. RIKON 70-105 uses five specified speed positions; JET JWL-1015VS offers variable speed within three ranges; WEN LA3421 uses a smaller MT1 tooling interface. These are materially different purchase decisions.

Compact-first: WEN LA3421

It suits a buyer who values compactness and already knows the project will remain small. It is less attractive if future MT2 accessory sharing is important. Compact does not mean no face shield or no dust controls.

Dedicated pen-oriented: RIKON 70-105

You gain common MT2 compatibility and a heavier platform. You give up speed changes by a knob and need adequate room for a 75 lb machine. Check the 1 inch by 8 TPI spindle thread before buying thread-on accessories.

Flexible MT2 alternative: JET JWL-1015VS

Its greater specification does not make it necessary for a beginner’s first Slimline pen. Compare the actual market price and warranty/parts situation rather than assuming it is the “best” machine for every buyer.

Budget with room: WEN LA3424

A five-speed machine can be perfectly suitable for pens when used according to its manual. Decide whether the larger footprint and the process of changing speeds fit your workspace and habits.

Checklist before purchase

The links in the product profiles take you to manufacturer source evidence and, when no exact Amazon ASIN has been verified, a model-specific Amazon search. A search destination is not evidence that the specified model is currently stocked on Amazon.

Worked comparison: small MT1 versus general-purpose MT2

These are use-case matches, not a measured ranking of accuracy or noise. No one model is best until the buyer has written down the intended work, available bench, and accessory budget.

Questions that change the recommendation

Does 12-inch swing mean better pens? No. Swing matters when you turn larger-diameter objects, but the pen blank and hardware are small. Does electronic variable speed mean no belt changes? Not necessarily; the JET has three published ranges. Is a manufacturer price an Amazon price? No. The shopping CTA uses a tagged search and does not verify a specific Amazon seller or inventory.

Sources and further verification

Source links are included to help you confirm equipment specifications, accessories and recommended safety practices. Specifications may change with product revisions.

Relevant gear and supplies

Compare documented specifications and compatibility before following a shopping link.