What does XKY Framing do?

XKY Framing (Yiwu Xinkuangyuan Machinery Co., Ltd.) designs and manufactures industrial framing machinery for picture frame, mirror, and cabinet door producers worldwide. Our product range includes fully automatic quad-corner underpinners (NN300), pneumatic and CNC underpinners (NN400–NN700), industrial stack cutting saws (NC500, NC600), dust-free miter saws (CT300), and pneumatic aluminium saws (CT400), plus a full range of V-nail fasteners.

Where is XKY Framing located?

XKY Framing is based at 77 Gexian Road, Yiwu City, Zhejiang Province, China — in the heart of the world's manufacturing hub. We supply framing machinery to customers globally.

What machines does XKY Framing manufacture?

XKY manufactures four main product categories: (1) Auto Underpinners — including the NN300 fully automatic quad-corner system (1,000+ frames/hour) and the NN400/NN500/NN600/NN700 pneumatic and CNC underpinners for joining 45° and 90° miter joints using V-nails. (2) Auto Cutting — including the NC600 industrial high-capacity stack saw and NC500 fully automatic stack cutting saw for double-miter cutting of MDF and wrapped profiles. (3) Frame Cutting — including the CT300 dust-free precision miter saw and CT400 pneumatic aluminium saw. (4) V-Nail Fasteners — compatible with all standard underpinner brands, available in soft, general-purpose, and hardwood grades from 7mm to 15mm.

How fast is the XKY NN300 automatic underpinner?

The XKY NN300 (SL-NN300) Fully Automatic Quad-Corner Underpinner joins all four corners of a frame simultaneously with a cycle time of 2–3 seconds, achieving over 1,000 joined frames per hour — up to 400% faster than manual operation. It is ideal for high-volume picture frame, mirror, and cabinet door production.

What is the difference between the NC500 and NC600 cutting saws?

The NC500 is a fully automatic stack cutting saw with a proprietary mold-based clamping system, best for complex or irregular moulding profiles up to 21.5" wide. The NC600 Industrial High-Capacity Stack Saw adds a 100mm (4") wide cutting range, anti-chip Three-Cut Mode, and zero-waste mirror-cut mode, boosting efficiency by 300–500% over manual saws. The NC600 is the flagship choice for large-scale laminated MDF and wrapped gesso frame factories.

Does XKY offer after-sales support and installation?

Yes. XKY provides a comprehensive service package: remote technical diagnostics via WhatsApp, WeChat, or Teams; full HD video tutorial libraries; on-site installation and operator training; a preventative maintenance program; 24-hour urgent support; and express spare parts dispatch (DHL/FedEx/UPS) from our Yiwu warehouse. Genuine spare parts are also available through xkyframing.com.

Are XKY V-nails compatible with other brands of underpinners?

XKY V-nail fasteners are made to the standard EN 10132 specification and are fully compatible with all major brand underpinners on the market. They are available in standard (0.30mm) and reinforced (0.38mm) thickness, in PS foam/plastic, general-purpose softwood, and hardwood grades, from 7mm to 15mm length.

How do I contact XKY Framing for a quote?

You can contact XKY Framing by phone or WhatsApp at +86 18758801620, visit our website at xkyframing.com, or reach us through our social media channels on LinkedIn, Facebook, Instagram, X (Twitter), and Pinterest.

Black Large Folding Clasp Hinge 32x37mm serrated slot picture frame back canvas assembly

T12-Black Large Folding Clasp Hinge

SKU: T12

Key Specs

Overall Width: 32mm
Overall Height: 37mm
Slot Width: 24mm
Upper Leaf Height: 10mm
Lower Section Height: 19mm
Hole Diameter: 6mm
Material Thickness: 0.5mm
Weight: 3.4g

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MOQ: 100•Lead time: 7-10days•Custom packaging: Available

The Black Large Folding Clasp Hinge features the widest slot in the XKY snap hinge range at 32mm, with a serrated upper leaf for secure snap-lock onto picture frame back panels. Designed for large-format frames requiring a wide bearing surface and firm clasp engagement.

Specification	Value
Overall Width	32mm
Overall Height	37mm
Slot Width	24mm
Upper Leaf Height	Upper Leaf Height
Lower Section Height	19mm
Hole Diameter	6mm
Material Thickness	0.5mm
Weight	3.4g

How does the Black Large Folding Clasp Hinge differ from the 8320 model?

The clasp hinge is 3mm wider (32mm vs 29mm), has a taller lower section (19mm vs 11mm), and is designed specifically for back-panel attachment rather than mid-panel joins. Its serrated edge provides a stronger initial grip.

What screw length is recommended for the Black Large Folding Clasp Hinge?

Use 4mm × 12mm pan-head screws for MDF back panels up to 6mm thick. For thicker back panels (6–12mm), use 4mm × 16mm screws for full thread engagement.

Can this hinge be painted over?

Yes. Apply a primer coat after installation for best adhesion, then finish with water-based or oil-based paint. The matte black base coat provides good paint adhesion without stripping.

Black Large Folding Clasp Hinge – Wide Serrated Clasp for Heavy Frame Backs

The Black Large Folding Clasp Hinge provides the widest slot profile in the XKY snap hinge series at 32mm, engineered specifically for large-format picture frame back-panel joining and heavy canvas assembly. The serrated clasp teeth lock onto frame moulding edges with a firm, rattle-free grip even in high-humidity gallery environments.

Wide Slot Advantage

The 32mm-wide body distributes fastening force across more of the moulding cross-section than the narrower 8320 (29mm) or E1429B (31mm) hinges. The 24mm inner slot accepts a range of screw head sizes, providing flexibility on varied production lines.

Specifications

Installation for Frame Backs

Position the hinge at the frame back corner, aligning the serrated lower leaf with the outer edge. Press firmly to seat the serrated teeth. Drive 4mm pan-head screws through the slotted upper leaf into the frame back board. The serrated lower leaf locks the hinge in place during screw installation, acting as a third hand.

Applications

Large picture frame back-panel securing, canvas stretcher bar corner reinforcement, shadow box back assembly, display cabinet panel joints, and heavy poster frame joining.

Comparison with Silver Large Folding Clasp Hinge

This black version is identical in function to the Silver Large Folding Clasp Hinge (T13). Select black for dark walnut or ebony frames; silver for natural oak or white-painted frames.

Reference: picture frame construction guide.