Onpin OP-1850 / OP-1850A Air Angle Grinder (Lever Type) - 4"/5" Pad, 0.63HP, Safety Trigger, M10/M14 Spindle

Price:Contact Jade M-Tech

Category: Angle Grinder

SKU: OP-1850

The Onpin OP-1850 (4" / 101 mm) and OP-1850A (5" / 127 mm) lever type air angle grinders deliver a motor power of 0.63 HP (470 W) operating at a standard air pressure of 90 psi (6.2 bar). They feature a safety trigger to prevent accidental start-up if dropped and an auxiliary handle designed to reduce operator fatigue. Offering free speeds of 11,000 rpm (OP-1850 with M10×1.5 spindle) and 9,500 rpm (OP-1850A with M14×2.0 spindle), the tool is fully compatible with grinding wheels, rubber pads, and wire brushes. This series is ideal for shipbuilding, sheet metal fabrication, foundry operations, hardware machinery, metal products, and vehicle modification industries.

OP-1850 Series Models & Sizes:

OP-1850
OP-1850A
OP-2850
OP-2850A
OP-1850 4"
OP-1850A 5"
Ref 1 Housing
Ref 2 Exhaust Deflector
Ref 3 Screw
Ref 4 Screw
Ref 5 Washer
Ref 6 Ball Bearing
Ref 7 Retaining Ring
Ref 8 Wave Washer
Ref 9 Driving Gear Spindle
Ref 10 Ball Bearing
Ref 11 Anvil M101.5
Ref 11 Anvil M142
Ref 12 Key
Ref 13 Packing
Ref 14 Washer
Ref 15 4" Wheel Guard
Ref 15 5" Wheel Guard
Ref 16 Spring Washer M5
Ref 17 Screw M5x15
Ref 18 Lock Nut M101.5
Ref 18 Lock Nut M142
Ref 20 Bevel Gear
Ref 21 Ball Bearing
Ref 22 Ball Bearing
Ref 23 Front Plate
Ref 24 Cylinder
Ref 25 Roll Pin
Ref 26 Rotor
Ref 27 Rotor Blade
Ref 28 Rear Plate
Ref 29 Regulator Valve
Ref 30 Lock Nut
Ref 42 O-Ring
Ref 43 Cylinder Set Screw
Ref 44 Lock Nut
Ref 45 Handle Body
Ref 46 Reverse Valve
Ref 47 Trigger
Ref 48 Spring Pin
Ref 49 Air Inlet
Ref 50 Pin Valve Rod
Ref 51 O-Ring
Ref 52 Spring
Ref 53 O-Ring
Ref 54 Screw
Ref 55 Handle
Ref 56 Wrench
Ref 57 Wrench 10
Ref 57 Wrench 14
Onpin air angle grinder lever type
safety trigger pneumatic angle grinder
4 inch 5 inch air angle grinder
Onpin OP-1850 replacement parts
industrial air angle grinder 0.63hp

Design file download links:

PDF file

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Description

Specification

What is Onpin OP-1850 / OP-1850A?

The Onpin OP-1850 / OP-1850A Air Angle Grinder is a lever-type handheld pneumatic power tool designed to operate at a standard air pressure of 90 psi (6.2 bar). Driven by a 0.63 HP pneumatic motor via a bevel gear system, it delivers rotational power to grinding media for stock removal, weld blending, and surface finishing in heavy industrial environments.

Key Features of Onpin OP-1850 / OP-1850A

Safety trigger mechanism: Prevents accidental start-up if dropped, providing high operational safety for workers.
Vibration-dampening auxiliary handle: Reduces hand fatigue and enhances tool stability during extended use.
High-output power: Provides 0.63 HP (470 W) motor power to handle demanding grinding applications.
Versatile accessory attachment: Fully compatible with grinding wheels, rubber backing pads, and wire cup brushes.
Compact & lightweight design: Weighs only 1.8 kg (3.96 lb) with an overall length of 245 mm (9.65 inches) for high maneuverability.

Technical Specifications of Onpin OP-1850 / OP-1850A

Brand: Onpin
Model Numbers: OP-1850 (4" Pad) | OP-1850A (5" Pad)
Pad Size:
OP-1850: 101 mm (4 inches)
OP-1850A: 127 mm (5 inches)
Spindle Thread:
OP-1850: M10 × 1.5
OP-1850A: M14 × 2.0
Free Speed:
OP-1850: 11,000 rpm
OP-1850A: 9,500 rpm
Motor Power: 0.63 HP (470 W)
Air Consumption: 452 l/min (16 cfm)
Operating Air Pressure: 90 psi (6.2 bar / 6.3 kg/cm²)
Overall Length: 245 mm (9.65 inches)
Air Inlet Thread: 1/4 P.T
Minimum Hose Size: 9.5 mm (3/8 inch)
Net Weight: 1.8 kg (3.96 lb)

Industrial Applications of Onpin OP-1850 / OP-1850A

Shipbuilding: Weld seam grinding, rust scaling, and hull metal prep.
Sheet Metal Fabrication: Edge deburring, smoothing cut edges, and sheet metal conditioning.
Foundry & Hardware Machinery: Removing flash lines from castings and servicing mechanical components.
Metal Products & Vehicle Modification: Surface polishing, metal finishing, and custom automotive bodywork.