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User Manual for Draper 98104 20V Brushless Angle Grinder

Comprehensive user guide for the Draper 98104 20V Brushless Angle Grinder. Includes setup, disc installation, battery charging, safety instructions, and troubleshooting.

Quick answers from the manual

Quick answer

  • The Draper 98104 is a 20V cordless angle grinder. It requires a Draper D20 battery pack and is designed for grinding and cutting metal or masonry. Always use the appropriate guard for the task (grinding vs. cutting). p. 2, 9

Key actions

  • Fitting the guard p. 9
  • Fitting/Replacing discs p. 10
  • Charging the battery p. 11

First start

  • Charge the battery before initial use. p. 11

Problems and fixes

Machine vibrates

Check for damaged/loose wheel, refit accessory.

p. 12

Maintenance and reset

  • If the machine stops due to excessive start/stopping, leave it for a few minutes to reset. p. 8

Technical specifications

Parameter Value Meaning Pages
Rated voltage 20V Operating voltage p. 2
No-load speed 8,500 r/min Maximum rotational speed p. 2
Spindle thread M14 Mounting thread size p. 2

Where to find it in the PDF

  • Identification of parts p. 8
  • Fitting the guard p. 9
  • Fitting grinding discs p. 10
  • Battery charging p. 11
Table of contents

Manual images

Click an image to enlarge
Identification of parts (Fig A) Page 8 Switch operation (Fig 1) Page 8 Fitting the guard (Fig 2) Page 9 Fitting grinding discs (Fig 6) Page 10 Battery charging (Fig 8) Page 11 Battery charge status (Fig 10) Page 12

Quick guide from the manual

The Draper 98104 is a 20V cordless angle grinder designed for grinding and cutting metal or masonry. This manual covers the safe operation, maintenance, and assembly of the tool. Always wear appropriate personal protective equipment (PPE), including safety glasses, ear defenders, and gloves. Ensure the battery is charged before initial use and that the correct guard is fitted for the specific task (grinding vs. cutting).

Product Identification

Key components of the tool include:

Identification of parts (Fig A)
Identification of parts (Fig A)
  • Soft grip
  • Spindle lock (used when changing discs)
  • Locking flange
  • Safety trigger and Trigger
  • Adjustable disc guard
  • Auxiliary handle
  • Dust screen

Assembly and Setup

Fitting the guard (Fig 2)
Fitting the guard (Fig 2)
Fitting grinding discs (Fig 6)
Fitting grinding discs (Fig 6)

Fitting the Guard

The guard must be fitted for safety. Position the guard onto the grinder collar with the quick-release lever open. Rotate the guard until the spigot lines up with the cutout, then rotate to the desired working position and tighten the lever.

Fitting/Replacing Accessories

To fit a disc:

  1. Press and hold the spindle lock button.
  2. Loosen the locking flange anti-clockwise using the supplied pin spanner.
  3. Remove the locking flange, clean the flanges and spindle.
  4. Place the accessory on the spindle, then replace the locking flange.
  5. Securely tighten the locking flange clockwise using the pin spanner while holding the spindle lock.

Note: For cutting applications, you must replace the "grinding" guard with a "cutting" guard.

Operation

Switch operation (Fig 1)
Switch operation (Fig 1)
Battery charging (Fig 8)
Battery charging (Fig 8)
Battery charge status (Fig 10)
Battery charge status (Fig 10)

Switching On/Off

The tool features a safety trigger and a main trigger. Excessive start/stopping may cause the machine to temporarily stop functioning; if this happens, leave the grinder for a few minutes to reset.

Battery Charging

The tool is supplied "bare" (no battery/charger). Use only Draper D20 battery packs and chargers. Plug the charger into a mains socket; the red LED indicates power. Slide the battery onto the charger. A flashing red LED indicates charging has begun. A solid green LED indicates the battery is fully charged.

Maintenance and Troubleshooting

Regularly clean the air vents to prevent dust accumulation. Do not use solvents or fuels for cleaning. If the tool vibrates, check if the wheel is damaged, out of balance, or loose. If the tool does not operate, check the battery charge or replace the battery pack.

Manufacturer information

Draper Tools

Brand profile
Manufacturer website https://www.drapertools.com Support https://www.drapertools.com/contact-us Manufacturer manuals https://www.drapertools.com/product-manuals

Practical help

Common problems

Tool does not operate

Check battery charge or replace faulty battery pack.

Motor runs slowly or loses power

Re-charge battery pack or replace if faulty.

Machine vibrates

Check if the wheel is damaged, out of balance, or loose. Stop immediately and refit the accessory.

Battery does not charge

Check for a blown fuse in the charger plug or replace the charger.

Before use

  • Ensure the battery is fully charged.
  • Inspect the abrasive wheel for cracks, chips, or wear.
  • Verify the guard is securely fitted and positioned correctly.
  • Wear safety goggles, ear defenders, and protective gloves.
  • Ensure the switch is in the off position before inserting the battery.

Specs in practice

Rated voltage
20V DC power supply.
No-load speed
8,500 r/min (maximum rotational speed).
Disc Diameter
125mm/115mm capacity.
Spindle thread
M14 standard thread for accessories.

Images and diagrams

  • Fig A: Identification of parts including spindle lock, trigger, and guard.
  • Fig 1: Operation of the safety trigger and main trigger.
  • Fig 6-7: Correct procedure for using the pin spanner to lock/unlock the flange.
  • Fig 10: Battery charge level indicator button and LED status.

Model compatibility

  • Use only Draper D20 battery packs.
  • Use only abrasive discs designed for this task.
  • Cutting operations require a specific 'cutting' guard (not included).
  • Do not use accessories requiring liquid coolants.

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Manual page author

Emily Carter

User documentation editor

Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.