1. Pengenalan
This manual provides detailed instructions for the installation, operation, and maintenance of your KOTARBAU 72mm BB Door Handle. Please read these instructions carefully before installation and retain them for future reference. Proper installation and care will ensure the longevity and optimal performance of your door handle.
2. Produk Lebihview
The KOTARBAU 72mm BB Door Handle is a robust and high-quality door fitting designed for both aesthetic appeal and functional security. It features a durable alloy steel construction with a nickel-plated finish, suitable for various door types and environments.
2.1 Komponen yang Disertakan
- Door handle set (two long plates with handles)
- Square spindle (8mm thick)
- Memasang skru
- Allen key (for securing handles)
- Arahan pemasangan (manual ini)
2.2 Ciri-ciri Utama
- Bahan: High-quality alloy steel with nickel-plated finish.
- Ketahanan: Designed for long-term use, resistant to wear and weather.
- Fit Universal: Compatible with various door types, suitable for both left and right-hand doors.
- Keselamatan: Solid construction enhances door security.
- Reka bentuk ergonomik: Comfortable and profiled handle shape for ease of use.

Figure 1: Complete KOTARBAU 72mm BB Door Handle set, including two handle plates, square spindle, screws, and Allen key.

Rajah 2: Terperinci view of the handle's ergonomic shape and the long plate with keyhole.
3. Persediaan dan Pemasangan
Before beginning installation, ensure you have the necessary tools (screwdriver, drill, measuring tape) and that the door is prepared for a 72mm BB (Buntbart) lock type. The 72mm measurement refers to the distance from the center of the handle spindle to the center of the keyhole.
3.1 Langkah Pemasangan
- Sediakan Pintu: Ensure the door has pre-drilled holes for the handle spindle and the keyhole, spaced 72mm apart (center-to-center).
- Masukkan Spindle: Insert the square spindle through the latch mechanism in the door.
- Position Handle Plates: Place one handle plate onto the spindle on one side of the door, aligning the keyhole and screw holes. Repeat for the other handle plate on the opposite side.
- Secure Handles: Use the provided mounting screws to firmly attach both handle plates to the door. Ensure the handles are level and operate smoothly.
- Operasi Ujian: After installation, test the handle's movement and the latch mechanism to ensure proper function.
This door fitting is designed for BB (Buntbart) lock types, but KOTARBAU also offers variants for PZ (profile cylinder) and WC (bathroom/toilet) locks. Verify your lock type before installation.

Figure 3: Diagram illustrating the 72mm center-to-center spacing and common lock types (BB, PZ, WC).
4. Arahan Operasi
To operate the KOTARBAU door handle, simply press the handle downwards to retract the door latch. Release the handle to allow the latch to extend and secure the door. For doors equipped with a BB lock, insert the appropriate key into the keyhole and turn to lock or unlock the door.
5. Penyelenggaraan
Regular maintenance ensures the longevity and smooth operation of your door handle.
- Pembersihan: Wipe the handle and plates with a soft, damp cloth. Avoid abrasive cleaners or harsh chemicals, as these can damage the nickel-plated finish.
- Pelinciran: Periodically apply a small amount of silicone-based lubricant to the latch mechanism inside the door to ensure smooth operation. Do not apply lubricant directly to the handle surface.
- Mengetatkan Skru: Check all mounting screws periodically and tighten them if they become loose. Loose screws can affect the handle's stability and function.
6. Penyelesaian masalah
| Masalah | Kemungkinan Punca | Penyelesaian |
|---|---|---|
| Pemegang terasa longgar atau goyah. | Skru pemasangan longgar. | Ketatkan semua skru pelekap yang kelihatan. |
| Handle is stiff or difficult to press. | Latch mechanism requires lubrication or is obstructed. | Apply silicone-based lubricant to the latch mechanism. Check for any obstructions in the door's mortise. |
| Latch does not retract fully. | Spindle not correctly seated or mechanism issue. | Re-check spindle alignment. If problem persists, consult a professional. |
7. Spesifikasi
| Atribut | Perincian |
|---|---|
| Jenama | KOTARBAU |
| Model | 72mm BB Door Handle |
| bahan | Keluli Aloi |
| Kemasan Luaran | bersalut nikel |
| warna | Patin. (Patina finish) |
| Dimensi Produk (L x W) | Approx. 9.45" x 1.57" (24cm x 4cm) for the long plate |
| Center-to-Center Spacing | 72 Millimeters (handle spindle to keyhole) |
| Spindle Thickness | 8 mm |
| Berat Barang | Approx. 0.43 Kilograms (15.2 ounces) |
| Orientasi Tangan | Ambidextrous (reversible for left/right doors) |
| Ciri Khas | Mudah Dipasang |
8. Waranti dan Sokongan
Untuk maklumat mengenai jaminan produk atau sokongan teknikal, sila rujuk kepada pegawai pengilang website or contact your retailer directly. Keep your purchase receipt as proof of purchase.