Cordless Rotary Tools

Electric Grinder-104

The Electric Engraving Pen 104 is a high-speed mini rotary tool designed for precision engraving, polishing, micro drilling, and electronics repair applications. Featuring a compact pen-style design (119mm, only 40g) and a powerful 18,000 RPM motor, this tool delivers smooth, stable performance for delicate and detailed work. Equipped with a 2.35mm metal chuck and 30PCS high-speed steel grinding bits, it supports a wide range of tasks including DIY carving, jewelry polishing, PCB repair, and model making.

OEM / ODM6 product photographsRequest a sample
OEM / ODM:Logo, color, packaging and configuration options are available for qualified orders.

Product overview

Manufacturer product information

Logo, color, packaging and configuration options are available for qualified orders.

Built with a durable aluminum alloy handle and ABS housing, this engraving pen ensures long-lasting use while maintaining lightweight portability. The 3-speed adjustable control with LED indicator allows precise operation across different materials. Powered by a 300mAh rechargeable lithium battery with Type-C fast charging, it supports continuous work while charging, improving efficiency for professional users.

We offer full OEM/ODM customization, including logo printing, color options, packaging design, and grinding bit configurations.

Perfect for global markets, this mini electric engraving pen combines performance, versatility, and cost-efficiency, making it a top choice for wholesale buyers and private label businesses.

Electric Grinder-104

Technical specifications

Product data from the supplied model document; current commercial terms are confirmed with each quotation.

Model
Engraving Pen 104
Rated Voltage
3.7V / 4V DC
No-load Speed
18,000 RPM
Max Torque
55 g·cm (stall torque)
Chuck Size
2.35mm Metal Chuck
Battery Capacity
300mAh Polymer Battery
Charging Interface
Type-C
Charging Time
~30 Minutes
Charging Input
5V-1A
Working Mode
Supports Charging While Using
Speed Control
3-Speed Adjustable
Indicator
LED Light Display
Motor Type
Carbon Brush Motor
Product Size
119 × 16 mm
Net Weight
40g
Housing Material
ABS + Aluminum Alloy
Bit Material
High-Speed Steel (25–30 HRC)
Working Temperature
20°C to 45°C

Applications & buyers

  • USA / EU tool importers & distributors
  • Mobile phone repair kit suppliers
  • Amazon FBA sellers (DIY tools niche)
  • Hardware wholesalers
  • OEM/ODM brand owners
  • This mini electric engraving pen tool kit is widely used in:
  • Electronics repair (smartphones, laptops, PCB boards)
  • DIY engraving & carving tools
  • Jewelry polishing & shaping
  • Wood carving & plastic trimming

Product highlights

  • Premium Build Quality
  • Aluminum Alloy Handle → Lightweight, durable, premium texture
  • ABS Housing → Impact-resistant & long-lasting
  • 2.35mm Metal Chuck → Stable clamping, high precision
  • ️ High-Speed Motor Performance
  • 18,000RPM for smooth engraving and micro drilling
  • Stable output ensures low vibration & high accuracy
  • Ultra-lightweight (40g) – fatigue-free operation
  • Pen-style ergonomic design – precision control
  • 3-speed intelligent adjustment – multi-material compatibility

Configuration & packaging

  • Box Size: 200 × 133 × 33 mm
  • Weight: 200g
  • Carton:
  • 80 PCS / Carton
  • Gross Weight: 17 KG
  • Carton Size: 54.5 × 41.5 × 43.5 cm

OEM / ODM options

  • We provide full customization for global buyers:
  • Logo printing (laser / silk screen)
  • Custom colors (10+ options available)
  • Packaging design (retail box / gift box)
  • Bit combinations (30+ configurations)
  • Material customization:
  • High-speed steel
  • Tungsten steel
  • 45# steel
  • Non-metal polishing / cutting / drilling bits

Order reference

  • Fast delivery Stable supply chain Export-ready packaging

Product FAQ

What is this engraving pen mainly used for?+

It is used for engraving, polishing, micro drilling, and precision repair work.

Can I customize the grinding bits?+

Yes, we support full customization of shapes and materials.

How long does the battery last?+

Approximately 60–90 minutes depending on usage.

Does it support continuous use?+

Yes, it supports working while charging.

What is the MOQ?+

Standard: 500 PCS Custom: 1000 PCS

Is it suitable for beginners?+

Yes, it is easy to operate and beginner-friendly.

What materials can it process?+

Plastic, wood, PCB, jewelry, soft metals, etc.

Can I get samples?+

Yes, samples are available within 3–5 days.

MODEL REFERENCEElectric Grinder-104

Cordless Rotary Tools · 6 product photographs

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