SN-01BM Ratchet Crimping Pliers – Open Barrel, High-Carbon Steel

The SN-01BM is a precision ratchet crimping tool built for miniature open-barrel terminals in the 0.08-0.5 mm² range, corresponding to AWG 28-20 wire sizes. It is designed for connectors such as JST XH, PH, EH, PA, and EL series, Molex PicoBlade and similar micro-fit terminals, KF2510, servo plugs, and D-SUB pins, making it a practical tool for wiring harnesses, 3D printer electronics, RC models, and general PCB-level assembly. The jaws are machined from high-carbon steel and finished to tight tolerances, so the crimp deforms the terminal uniformly rather than crushing it.

A ratchet mechanism holds the handles closed until a full crimp cycle is completed, which prevents partial crimps and gives repeatable results; the design also reduces the force needed compared with a plain plier-style crimper. Because the tool crimps the conductor barrel and the insulation support in a single squeeze, there is no need for a second operation. A release screw at the handle pivot allows the ratchet to be opened if a terminal jams. The handles are covered in non-slip PP and TPE grips with an ergonomic shape, and a locking latch keeps the tool closed for storage. The Aftab listing gives an overall length of 197 mm and a high-carbon steel body.

1. Crimping JST XH, PH, EH, PA, and EL series open-barrel terminals.
2. Crimping Molex PicoBlade and other micro-fit connector contacts.
3. Terminating KF2510, servo plugs, and D-SUB pins.
4. Wiring harness assembly for 3D printers, CNC boards, and robotics.
5. RC model, drone, and small electronic device wiring.
6. Precision electronics repair and PCB-level connector work.

1. Model: SN-01BM.
2. Tool type: ratchet crimping pliers for open-barrel terminals.
3. Crimping capacity: 0.08-0.5 mm².
4. Wire gauge range: AWG 28-20.
5. Overall length: 197 mm (Aftab listing; the manufacturer states 190 mm).
6. Weight: approximately 400 g (manufacturer data).
7. Body and jaw material: high-carbon steel (Aftab listing); special carbon steel jaws per manufacturer.
8. Handle material: polypropylene (PP) with thermoplastic elastomer (TPE).
9. Ratchet mechanism: full-cycle ratchet with emergency release screw.
10. Crimp action: simultaneous crimping of conductor barrel and insulation support in one squeeze.
11. Compatible terminals: JST XH/PH/EH/PA/EL, Molex PicoBlade, KF2510, servo connectors, D-SUB pins, open-barrel terminals.
12. Handle features: non-slip grip, ergonomic contour, locking latch for storage.