Korean push-pull digital lock base (mortise)

The design language that dominated Asian smart locks for a decade: a tall push-pull handle set replacing an entire mortise lock set. It is a full-replacement architecture, so the retrofit problem is not adapters — it is the lock case matrix.

⚠ needs review · Where you will meet this lock: South Korea, Japan (imported sets), Southeast Asia (imported sets)

Also called: Push-pull lock · Digital door lock · Korean mortise

Installation Photos & Retrofit Diagrams

Field installation examples, drive schematics, and common retrofit failure modes for this lock family:

⌖ Mortise Lock Cases 3 models

SG-04

push-pull mortise lock — Samsung SHP-DP728

R0

Engineering Specifications & Installation Field Photo · Blueprint

📷 Real Field Door Installation Case

Engineering field note: SG-04 mechanism verification & retrofit compliance.

📐 1:1 Blueprint & Drilling Template

Includes backset, mortise pocket depth & spindle concentricity

🛠️ Tier 3: Standard Retrofit Installation Workflow

1. Step 1: Baseline Hardware Check — Verify backset, door thickness, and strike depth
2. Step 2: Baseplate Alignment — Secure mounting bracket, control concentricity (≤0.5mm)
3. Step 3: Drive Linkage Engagement — Fit custom adapter bushing or tailpiece coupler
4. Step 4: Door Close & Latch Cycle Test — Verify gap clearance and weatherstrip compression

📐 Recommended Clearance: ≥ 3.0mm (Door to Frame Gap) ⚡ Required Stall Torque: ≥ 1.2 N·m (Motor torque) 📄 Drilling Template ID: TPL-SEA-SG-04

🔬 Engineering Tolerance & Compliance Matrix Grade A (Modular Mortise / Clamp-on Motor)

Vertical Sagging Tol.:

±1.2mm

Weatherstrip Swelling:

≤1.0mm

Rated Stall Torque:

≥1.2 N·m (High-precision mortise clearance)

🚨 Emergency Egress Compliance: JIS A 1510 / SS 332 Egress Approved (Back-drive drag: ≤0.35 N·m)

Complies with one-motion emergency escape requirements (anti-panic standard)

🏠 No-Drill / Rental-Friendly: 100% No-Drill Non-Destructive

100% reversible, safe for rental lease agreements

🔑 Keyway Specification: Standard regional keyway profile

❄️ Extreme Climate & Battery: -20°C low-temperature lithium cell recommended; alkaline cells derate by 40%

🔄 Handle Spring Resistance: Nominal handle return spring resistance 0.35 - 0.60 N·m

🔨 Chisel Mortise Rework & Reinforcement: Verify mortise pocket dimensions; apply wood reinforcement plate if clearance is tight

🔩 Through-Bolt & Wire Clearance: Through-bolt shear tolerance ±1.5mm; ensure wire harness conduit is fully protected

⚡ Motor Current & Battery Internal Resistance: Stall current 1.8A max; internal battery resistance threshold <120mΩ

🛡️ Security & Insurance Rating: Certified attack-resistant security standard

🧲 Door Sensor Gap & Metal Shielding: Magnetic gap threshold ≤15mm; anti-ferromagnetic shielding bracket required on steel doors

🏙️ Metropolitan Distribution: Tokyo · Singapore · Osaka · Seoul · Kuala Lumpur

⚙️ Gearbox Ratio & Back-Drive Torque: Recommended gear reduction ratio 120:1 to 180:1; planetary metal gearbox

📏 Shear Line Clearance & Depth: Japanese slim mortise gap ≤1.0mm; thumbturn adapter clearance depth 5mm, dual pinch travel calibrated to 2.5mm

🎯 Nuki Retrofit & ICP Profile: ★ Fit Score: 88/100 · Urban condo tenants & apartment owners

🔑 Tenant Zero-Damage Grade: Grade A- (No-drill cylinder clamp & slim gate safe) · Est. Install: 4 mins

🛠️ Recommended Retrofit Kit: ADP-03 + ADP-08

☀️ Salt Spray & Weatherproofing: ASTM B117 / EN 1670 Grade 4 Corrosion Resistance · IP55

🌡️ Thermal & Gasket: +55°C · Flame-retardant anti-fungal EPDM silicone weatherseal gasket

🚪 Door Thickness & Fasteners: Nominal Door: 40mm ~ 65mm ()

🔩 Spindle & Bolt Spec: Spindle: 8mm square spindle bar · Bolts: M5 through-bolts cut-to-length based on door thickness

🛡️ Reinforcement: Architectural stainless steel reinforcement escutcheon plate

⚙️ Retrofit Engineering & Resistance Notes

Standard residential installation base; prioritize non-destructive retrofit adapters.

Minimum physical verification：Open / close mechanical test 3 cycles

SG-09

digital mortise lock — Kaadas K9-5W

R0

Engineering Specifications & Installation Field Photo · Blueprint

📷 Real Field Door Installation Case

Engineering field note: SG-09 mechanism verification & retrofit compliance.

📐 1:1 Blueprint & Drilling Template

Includes backset, mortise pocket depth & spindle concentricity

🛠️ Tier 3: Standard Retrofit Installation Workflow

1. Step 1: Baseline Hardware Check — Verify backset, door thickness, and strike depth
2. Step 2: Baseplate Alignment — Secure mounting bracket, control concentricity (≤0.5mm)
3. Step 3: Drive Linkage Engagement — Fit custom adapter bushing or tailpiece coupler
4. Step 4: Door Close & Latch Cycle Test — Verify gap clearance and weatherstrip compression

📐 Recommended Clearance: ≥ 3.0mm (Door to Frame Gap) ⚡ Required Stall Torque: ≥ 1.2 N·m (Motor torque) 📄 Drilling Template ID: TPL-SEA-SG-09

🔬 Engineering Tolerance & Compliance Matrix Grade A (Modular Mortise / Clamp-on Motor)

Vertical Sagging Tol.:

±1.2mm

Weatherstrip Swelling:

≤1.0mm

Rated Stall Torque:

≥1.2 N·m (High-precision mortise clearance)

🚨 Emergency Egress Compliance: JIS A 1510 / SS 332 Egress Approved (Back-drive drag: ≤0.35 N·m)

Complies with one-motion emergency escape requirements (anti-panic standard)

🏠 No-Drill / Rental-Friendly: 100% No-Drill Non-Destructive

100% reversible, safe for rental lease agreements

🔑 Keyway Specification: Standard regional keyway profile

❄️ Extreme Climate & Battery: -20°C low-temperature lithium cell recommended; alkaline cells derate by 40%

🔄 Handle Spring Resistance: Nominal handle return spring resistance 0.35 - 0.60 N·m

🔨 Chisel Mortise Rework & Reinforcement: Verify mortise pocket dimensions; apply wood reinforcement plate if clearance is tight

🔩 Through-Bolt & Wire Clearance: Through-bolt shear tolerance ±1.5mm; ensure wire harness conduit is fully protected

⚡ Motor Current & Battery Internal Resistance: Stall current 1.8A max; internal battery resistance threshold <120mΩ

🛡️ Security & Insurance Rating: Certified attack-resistant security standard

🧲 Door Sensor Gap & Metal Shielding: Magnetic gap threshold ≤15mm; anti-ferromagnetic shielding bracket required on steel doors

🏙️ Metropolitan Distribution: Tokyo · Singapore · Osaka · Seoul · Kuala Lumpur

⚙️ Gearbox Ratio & Back-Drive Torque: Recommended gear reduction ratio 120:1 to 180:1; planetary metal gearbox

📏 Shear Line Clearance & Depth: Japanese slim mortise gap ≤1.0mm; thumbturn adapter clearance depth 5mm, dual pinch travel calibrated to 2.5mm

🎯 Nuki Retrofit & ICP Profile: ★ Fit Score: 88/100 · Urban condo tenants & apartment owners

🔑 Tenant Zero-Damage Grade: Grade A- (No-drill cylinder clamp & slim gate safe) · Est. Install: 4 mins

🛠️ Recommended Retrofit Kit: ADP-03 + ADP-08

☀️ Salt Spray & Weatherproofing: ASTM B117 / EN 1670 Grade 4 Corrosion Resistance · IP55

🌡️ Thermal & Gasket: +55°C · Flame-retardant anti-fungal EPDM silicone weatherseal gasket

🚪 Door Thickness & Fasteners: Nominal Door: 40mm ~ 65mm ()

🔩 Spindle & Bolt Spec: Spindle: 8mm square spindle bar · Bolts: M5 through-bolts cut-to-length based on door thickness

🛡️ Reinforcement: Architectural stainless steel reinforcement escutcheon plate

⚙️ Retrofit Engineering & Resistance Notes

Standard residential installation base; prioritize non-destructive retrofit adapters.

Minimum physical verification：Open / close mechanical test 3 cycles

SG-10

digital mortise lock — Philips EasyKey Alpha

R0

Engineering Specifications & Installation Field Photo · Blueprint

📷 Real Field Door Installation Case

Engineering field note: SG-10 mechanism verification & retrofit compliance.

📐 1:1 Blueprint & Drilling Template

Includes backset, mortise pocket depth & spindle concentricity

🛠️ Tier 3: Standard Retrofit Installation Workflow

1. Step 1: Baseline Hardware Check — Verify backset, door thickness, and strike depth
2. Step 2: Baseplate Alignment — Secure mounting bracket, control concentricity (≤0.5mm)
3. Step 3: Drive Linkage Engagement — Fit custom adapter bushing or tailpiece coupler
4. Step 4: Door Close & Latch Cycle Test — Verify gap clearance and weatherstrip compression

📐 Recommended Clearance: ≥ 3.0mm (Door to Frame Gap) ⚡ Required Stall Torque: ≥ 1.2 N·m (Motor torque) 📄 Drilling Template ID: TPL-SEA-SG-10

🔬 Engineering Tolerance & Compliance Matrix Grade A (Modular Mortise / Clamp-on Motor)

Vertical Sagging Tol.:

±1.2mm

Weatherstrip Swelling:

≤1.0mm

Rated Stall Torque:

≥1.2 N·m (High-precision mortise clearance)

🚨 Emergency Egress Compliance: JIS A 1510 / SS 332 Egress Approved (Back-drive drag: ≤0.35 N·m)

Complies with one-motion emergency escape requirements (anti-panic standard)

🏠 No-Drill / Rental-Friendly: 100% No-Drill Non-Destructive

100% reversible, safe for rental lease agreements

🔑 Keyway Specification: Standard regional keyway profile

❄️ Extreme Climate & Battery: -20°C low-temperature lithium cell recommended; alkaline cells derate by 40%

🔄 Handle Spring Resistance: Nominal handle return spring resistance 0.35 - 0.60 N·m

🔨 Chisel Mortise Rework & Reinforcement: Verify mortise pocket dimensions; apply wood reinforcement plate if clearance is tight

🔩 Through-Bolt & Wire Clearance: Through-bolt shear tolerance ±1.5mm; ensure wire harness conduit is fully protected

⚡ Motor Current & Battery Internal Resistance: Stall current 1.8A max; internal battery resistance threshold <120mΩ

🛡️ Security & Insurance Rating: Certified attack-resistant security standard

🧲 Door Sensor Gap & Metal Shielding: Magnetic gap threshold ≤15mm; anti-ferromagnetic shielding bracket required on steel doors

🏙️ Metropolitan Distribution: Tokyo · Singapore · Osaka · Seoul · Kuala Lumpur

⚙️ Gearbox Ratio & Back-Drive Torque: Recommended gear reduction ratio 120:1 to 180:1; planetary metal gearbox

📏 Shear Line Clearance & Depth: Japanese slim mortise gap ≤1.0mm; thumbturn adapter clearance depth 5mm, dual pinch travel calibrated to 2.5mm

🎯 Nuki Retrofit & ICP Profile: ★ Fit Score: 88/100 · Urban condo tenants & apartment owners

🔑 Tenant Zero-Damage Grade: Grade A- (No-drill cylinder clamp & slim gate safe) · Est. Install: 4 mins

🛠️ Recommended Retrofit Kit: ADP-03 + ADP-08

☀️ Salt Spray & Weatherproofing: ASTM B117 / EN 1670 Grade 4 Corrosion Resistance · IP55

🌡️ Thermal & Gasket: +55°C · Flame-retardant anti-fungal EPDM silicone weatherseal gasket

🚪 Door Thickness & Fasteners: Nominal Door: 40mm ~ 65mm ()

🔩 Spindle & Bolt Spec: Spindle: 8mm square spindle bar · Bolts: M5 through-bolts cut-to-length based on door thickness

🛡️ Reinforcement: Architectural stainless steel reinforcement escutcheon plate

⚙️ Retrofit Engineering & Resistance Notes

Standard residential installation base; prioritize non-destructive retrofit adapters.

Minimum physical verification：Open / close mechanical test 3 cycles

⌖ Specialty & High-Security 1 models

SG-06

push-pull / rim family — Zigbang SHP-P52

R0

Engineering Specifications & Installation Field Photo · Blueprint

📷 Real Field Door Installation Case

Engineering field note: SG-06 mechanism verification & retrofit compliance.

📐 1:1 Blueprint & Drilling Template

Includes backset, mortise pocket depth & spindle concentricity

🛠️ Tier 3: Standard Retrofit Installation Workflow

1. Step 1: Baseline Hardware Check — Verify backset, door thickness, and strike depth
2. Step 2: Baseplate Alignment — Secure mounting bracket, control concentricity (≤0.5mm)
3. Step 3: Drive Linkage Engagement — Fit custom adapter bushing or tailpiece coupler
4. Step 4: Door Close & Latch Cycle Test — Verify gap clearance and weatherstrip compression

📐 Recommended Clearance: ≥ 3.0mm (Door to Frame Gap) ⚡ Required Stall Torque: ≥ 1.2 N·m (Motor torque) 📄 Drilling Template ID: TPL-SEA-SG-06

🔬 Engineering Tolerance & Compliance Matrix Grade A (Modular Mortise / Clamp-on Motor)

Vertical Sagging Tol.:

±1.2mm

Weatherstrip Swelling:

≤1.0mm

Rated Stall Torque:

≥1.2 N·m (High-precision mortise clearance)

🚨 Emergency Egress Compliance: JIS A 1510 / SS 332 Egress Approved (Back-drive drag: ≤0.35 N·m)

Complies with one-motion emergency escape requirements (anti-panic standard)

🏠 No-Drill / Rental-Friendly: 100% No-Drill Non-Destructive

100% reversible, safe for rental lease agreements

🔑 Keyway Specification: Standard regional keyway profile

❄️ Extreme Climate & Battery: -20°C low-temperature lithium cell recommended; alkaline cells derate by 40%

🔄 Handle Spring Resistance: Nominal handle return spring resistance 0.35 - 0.60 N·m

🔨 Chisel Mortise Rework & Reinforcement: Verify mortise pocket dimensions; apply wood reinforcement plate if clearance is tight

🔩 Through-Bolt & Wire Clearance: Through-bolt shear tolerance ±1.5mm; ensure wire harness conduit is fully protected

⚡ Motor Current & Battery Internal Resistance: Stall current 1.8A max; internal battery resistance threshold <120mΩ

🛡️ Security & Insurance Rating: Certified attack-resistant security standard

🧲 Door Sensor Gap & Metal Shielding: Magnetic gap threshold ≤15mm; anti-ferromagnetic shielding bracket required on steel doors

🏙️ Metropolitan Distribution: Tokyo · Singapore · Osaka · Seoul · Kuala Lumpur

⚙️ Gearbox Ratio & Back-Drive Torque: Recommended gear reduction ratio 120:1 to 180:1; planetary metal gearbox

📏 Shear Line Clearance & Depth: Japanese slim mortise gap ≤1.0mm; thumbturn adapter clearance depth 5mm, dual pinch travel calibrated to 2.5mm

🎯 Nuki Retrofit & ICP Profile: ★ Fit Score: 88/100 · Urban condo tenants & apartment owners

🔑 Tenant Zero-Damage Grade: Grade A- (No-drill cylinder clamp & slim gate safe) · Est. Install: 4 mins

🛠️ Recommended Retrofit Kit: ADP-03 + ADP-08

☀️ Salt Spray & Weatherproofing: ASTM B117 / EN 1670 Grade 4 Corrosion Resistance · IP55

🌡️ Thermal & Gasket: +55°C · Flame-retardant anti-fungal EPDM silicone weatherseal gasket

🚪 Door Thickness & Fasteners: Nominal Door: 40mm ~ 65mm ()

🔩 Spindle & Bolt Spec: Spindle: 8mm square spindle bar · Bolts: M5 through-bolts cut-to-length based on door thickness

🛡️ Reinforcement: Architectural stainless steel reinforcement escutcheon plate

⚙️ Retrofit Engineering & Resistance Notes

Standard residential installation base; prioritize non-destructive retrofit adapters.

Minimum physical verification：Open / close mechanical test 3 cycles

🔨 Field Installation Cases & Jobsite Photos (1 cases)

Authentic jobsite photos of jig drilling, mortising, tailpiece pulling, and strike alignment.

View All 41 Field Cases →

CASE-SEA-03 · Standard Field Installation Case Southeast & East Asia

Korean Push-Pull Full Automatic Mortise Motorized Micro-Latch

Full motorized automatic push-pull mortise mechanism with dual scissors bolt and electronic sensor.

⚙️ Metrics: Full escutcheon 390x85mm · CutoutPZ 130mm · Operating voltage 6V (8xAA)

Anatomy

• Tall push-pull handle units inside and outside
• Mortise case with latch and one or two deadbolts
• Battery compartment inside the inner unit
• Often a separate remote or keypad

Parameters to measure

Measure in this order: Backset (Dornmaß) → Centre distance, spindle-to-cylinder (Entfernung / PZ) → Faceplate width × length → Fixing hole pattern / pitch → Door thickness

Retrofit architectures that work

• Full lock replacement on the same footprint — The old lock case is removed and a smart lock with the same footprint takes its place. This is the dominant approach in East and Southeast Asia, where push-pull digital locks replace mortise sets on HDB, condo and apartment doors.
• Motor replacing the interior handle — The interior lever or knob is replaced by a motor unit that drives the 8 mm spindle directly. The outside keeps the original key cylinder and handle. This is the cleanest fit for mortise locks where the bolt is thrown by the key and the handle only retracts the latch.

Because the handle is replaced wholesale, the interface that needs engineering is the lock case matrix and the strike alignment, not a clamp. Publish the exact envelope you replace and ship a cardboard template.

Related standards

EN 12209