Typical fitEntry-Level to Mid-Scale
Choose an Underpinner for Your Framing Shop
Underpinner choice sets daily throughput, material compatibility, and operator training time. Use this summary to narrow NN400, NN500, and NN700 β then read the full engineering comparison for stack modes, clamping, and MDF protection details.
Who this is for
First-time buyers comparing pneumatic vs CNC joining, studio managers upgrading from a single-station shop, and engineers specifying corner joint equipment for wood, PS, MDF, and aluminium profiles.
NN400 β entry pneumatic joining
NN400 suits starter workshops that need reliable corner joints on wood and PS profiles with minimal setup. Active clamping helps operators maintain consistent pressure without a full CNC workflow.
Choose NN400 when budget and floor space are tight and an operator can manage nail stack selection manually.
NN500 β studio throughput
NN500 adds touchscreen recall, faster stack modes, and operator-friendly batch workflows. It is the default studio pick for shops targeting hundreds to a few thousand frames per day on regular materials.
Choose NN500 when speed and convenience matter more than delicate MDF surface protection.
NN700 β CNC with MDF protection
NN700 is a CNC frame joiner with MDF protection for delicate surfaces and coated profiles. Cycle steps are slightly longer, but quality and material safety improve on premium work.
Choose NN700 when MDF, coated mouldings, or quality-first custom orders justify the step-up from NN500.
Compare flagship underpinners
Request quotes for the models that match your materials and daily output.
NN400 pneumatic underpinner
Entry-Level Β· active clamping
NN500 touchscreen underpinner
Mid-Scale Β· batch throughput
NN700 CNC frame joiner
Mid-Scale Β· MDF protection
Full engineering comparison
Stack modes, clamping diagrams, maintenance intervals, and side-by-side spec tables live in our Docs Center guide β use it when you are down to two models.
Read underpinner vs frame joiner guide βStarter shops: begin with NN400
NN400 active-clamping pneumatic underpinners cover most entry workshops without CNC programming. Request a starter quote when wood and PS profiles dominate and daily volume is under ~150 frames.
Underpinner selection FAQ
Do I need CNC for a small framing shop?
Not always. Many starter shops run NN400 pneumatic underpinners for years before upgrading. CNC (NN700) pays off when MDF protection and repeatable programs reduce rework on premium orders.
NN500 or NN700 for mixed wood and MDF?
Regular wood and PS batch work β NN500. Frequent delicate MDF or coated profiles β NN700. Share your material mix on a quote request for a scoped recommendation.
Can I upgrade from NN400 to NN500 later?
Yes β many customers validate volume on NN400, then add or replace with NN500/NN700 on a studio path. Layout plans should leave space for a second joining station if growth is expected.