Bench Grinder (6in)

From Pumping Station One

Bench Grinder (6in) Area: {{{hostarea}}}

Bench Grinder (6in)
6inch grinder.jpg
Owner/Loaner PS:One
Serial Number 24295
Make/Model Collins 6" Bench Grinder
Arrival Date April 15, 2009
Usability yes
Contact Dan Meyer
Where Machine Shop
Authorization Needed yes
Hackable no
Estimated Value $50
Host Area {{{hostarea}}}


Safe Operation

A bench grinder is a machine used to drive an abrasive wheel or wheels. Depending on the grade of the grinding wheel, it may be used for sharpening cutting tools or shaping metal. To avoid accidents, the following operational safety rules must be observed by everyone working on the Pumping Station: One (PS:One) bench grinder. Failure to follow the safety rules may result in a loss of shop privileges.

A Special Note About Fire Safety:
A bench grind produces a shower of sparks when grinding metal. Know where your nearest fire extinguisher is located before you start grinding. Prior to starting grinding operations inspect the immediate area for, and remove, all flammable materials. Re-inspect the area 30 minutes after the last sparks are generated to ensure that no fires are smoldering.

Start With A Risk Assessment To Ensure A Safe Work Area:
1. A two-foot perimeter around the grinder should be kept clear of people, debris that impair traction or footing to avoid slips and falls.
2. 2. ANSI Z87.1 rated safety glasses with side shields or a face shield must be worn. Hearing protection should be worn but is optional for the band saw module itself unless there is other excessive noise in the shop..
3. Remove loose fitting clothing, jewelry, and tie back long hair.
4. Give the work your undivided attention.

Bench Grinder Safety Rules:
1. Before working with a bench grinder, make sure the tool and its accessories are in the proper working order.
2. If you are mounting new wheels or changing existing wheels perform a “Ring Test”. Suspend the wheel on a pencil held horizontally through the center of the hole. Tap the wheel lightly with a plastic screwdriver handle, in spots 45 degrees from vertical. If it produces a clear ringing tone it is in good condition. If it sounds dull, replace it. NOTE: The ring test will not work on wheels already mounted on the bench grinder.
4. Make sure the wheel housing guards are in place.
5. New grinding wheels should be balanced by dressing and truing to eliminate vibration.
6. Used wheels should be trued and dressed when worn out of round, or the surface face is clogged or worn smooth. This provides a clean sharp grinding surface and rebalancing of the wheel. Dress the wheel on the face only. Dressing the side of the wheel would cause it to become too thin for safe use.
7. Don’t operate a grinder unless it is securely mounted to the workbench.
8. Do not grind on the side of the wheel.
9. Do not grind soft materials such as wood, rubber or non-ferrous metals such as copper or aluminum. Soft material can clog up the face of the wheels. Dust from soft materials may also accumulate inside the wheel housings and be a potential fire source.

Operational Safety Rules:
1. Approach your work in the PS:One Shop & on the bench grinder with a safe attitude!
2. Adjustments need to be made when the grinder is unplugged & stopped. Adjust tool rests 1/8” from the wheels and slightly below center line of the wheels and spark or shatter guards (at the top of the wheel housing guards) 1/2” away from the wheels. Re-adjust these as the wheels wear down to a smaller diameter.
3. Stand to one side of the wheel when turning on power. Allow the grinding wheel to run at full operating speed for one minute before standing in front of the grinder. DO NOT use a wheel that vibrates. Use your hearing to listen for unusual sounds and put your hand on the bench to feel for excessive vibration.
4. Bring the object into contact with the grinding wheel slowly and smoothly avoiding impact or bumping motions.
5. Move the object being ground, back and forth across the face of the wheel only, as this prevents "ruts" or grooves from forming.
6. Never grind small stock. Do not attempt to grind or sharpen anything that cannot be adequately supported by the tool rest. Use clamping pliers when grinding parts that cannot be held easily by hand.
7. Do not touch the ground portion of the workpiece until it has cooled.
8. Keep bystanders a safe distance away from the work area. Anyone entering the work area must wear his/her PPE.
9. Turn off grinder and wait until it coasts to a complete stop. Never stick an object into the wheel to stop the grinder quicker. Let it stop on it’s own.

Bench Grinder Safety Exam

Minimum score to pass: 70% or 11 out 15 correct
You may also take this test online at:

1. The grinder is currently the only machine in the shop that you must use both safety glasses and a face shield while using.
A. True
B. False

2. Remove all jewelry except wedding ring when using the grinder.
A. True
B. False

3. It’s ok to use a grinding wheel that you see has only small hairline cracks.
A. True
B. False

4. You should operate the grinder with the wheel housing guards removed from around the grinding wheels to observe for wheel wobbling.
A. True
B. False

5. The bench grinder is to be mounted or secured to the table or workbench while in use.
A. True
B. False

6. Grinding wheels must be stopped before adjusting the tool rest and shatter or spark guards.
A. True
B. False

7. Spark or shatter guard must be adjusted to ½” from the wheel.
A. True
B. False

8. The tool rest needs to be adjusted only 1/8” from the wheel.
A. True
B. False

9. Stand squarely in front of the grinder when you turn it on.
A. True
B. False

10. Force material into the grinding wheel.
A. True
B. False

11. Use a wheel that vibrates excessively to insure a smooth grind. A. True
B. False

12. Use the side of the wheel for heavy grinding.
A. True
B. False

13. Dress the wheel when it is out of round, clogged, or has groves worn in it.
A. True
B. False

14. Operate the grinder when another person is standing nearby.
A. True
B. False

15. Leave the bench grinder without turning it off.
A. True
B. False

Score: ______________

X ___________________________________ Date: ________________________
Signature Of PS:One Member

X ___________________________________ Date: ________________________
Signature Of PS:One Safety Officer Or Authorized Representative

This tool may require training to be used correctly.

Training Resources

MIT Machine Shop 1 – Machining Skills for Prototype Development
MIT Machine Shop 2 – Machining Skills for Prototype Development
MIT Machine Shop 3 – Machining Skills for Prototype Development

List of Currently Authorized Users

Qualified Member Trained By
Eric Michaud Danger Committee
Nathan Witt Danger Committee
Geoffrey Topham Danger Committee
Jordan Bunker Nathan Witt
Cory Knapp Nathan Witt
Alek Shnajcker Nathan Witt
Constantin Gavrilescu Nathan Witt
Anne Petersen Nathan Witt
John dorfman Nathan Witt
Dan Locks Tim Saylor
Patrick Callahan Dan Locks
Aaron Didier Patrick Callahan
Eric Stein Steven Finkelman
Mike Warot Adrianna McKinley
Larry Thorpe Mike Warot
Dee Mike Warot
David Fell Tucker Tomlinson
Justin T. Conroy Ed Bennett
Barmey Ung Mike Warot
Sloan Lavery Ed Bennett
David Morton Ed Bennett
David Koppel Adrianna McKinley
Tyler Natoli Ed Bennett
Leon Grossman Adrianna McKinley
Michael Skilton Dan Meyer
Todd Allen Ed Bennett
Kyle Bieneman Todd Allen
Scott Little Todd Allen
RJ Metzger Todd Allen
Giovanni Arroyo Todd Allen
Lucas Goossen Todd Allen
Eric Yu Ron Olson
Ryan Taylor Everett Wilson
Andy Richardson Everett Wilson
David Srebro Ron Olson
Glenn Powers Ron Olson
Jeff Lawson Ron Olson
James Villalpando Ron Olson
Hunter Koerner Ron Olson
Raj Perera Ron Olson
Tom Boeman Ron Olson
Erik Wessing Ron Olson
Niko Hawley Ron Olson
Aaron Carlock Ron Olson
Greg Kudlacz Ron Olson
Daniel Maziarz Ron Olson
Jim Baker Ron Olson
Sheila Miguez Everett Wilson
Brandon Love Michael Patton 1/27/16
Keith Couture Ron Olson 3/1/16
Adam Stafford Michael Patton 4/17/16
Ian Monroe Michael Patton 6/29/16
Joe Iklov Michael Patton 6/29/16
Jim Brink Michael Patton 6/29/16
Eugene Liokumovich Michael Patton 9/10/2016
Sam Olendorf Michael Patton 9/10/2016
Brian Cuocci Michael Patton 10/5/16
Chris Iacullo Daron Wooding 11/26/16
Andrew Vaughan Chris Iacullo May 11, 2017
Brian Adamson Ron Olson May 16, 2017
Andrew Wingate Chris July 6, 2017
Arjun Sharma Chris Iacullo 7/28/17
Kari Danek Chris Iacullo 1/25/18