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> *Grand Rapids Hand Screw Co*

In general, measurements are taken from examples in the collection of the editor, or from dated catalogs. If you can supply data for missing models, please help me out. Thank you.

Note that Grand Rapids No series assigns big numbers to long jaws, contrary to the usual practice. Perhaps, I should count this as a proprietary numbering scheme.

In 1914, the models were identified as 800, 801, and so on to 816, with jaws ranging from 28 inches to 4 inches. The price, per dozen, ranged from $40 to $7, with a single jaw or spindle now at one-third the price of a complete Hand Screw. (A dozen 800s weighed 195 pounds, packed for shipment!)

I do not know when the switch over took place between theses dates.

The tables have been merged to compare the two series. The correspondence is not exact. Grand Rapids Handscrew did not just assign new numbers to old models, but rather redesigned the series. What was the basis for the changes?

8xx | Jaw Length |
WxD Size |
Spindle Diameter |
Spindle Length |
No | Jaw Length |
WxD Size |
Spindle Diameter |
Spindle Length |

N/A | 14 | 24 | 2 3/4 x 3 | 1 1/4 | 26 | ||||

800 | 24 | 3 x 3 | 1 1/4 | 28 | 13 | 24 | 2 3/4 x 3 | 1 1/4 | 24 |

801 | 22 | 2 3/4 x 2 3/4 | 1 1/4 | 26 | |||||

802 | 20 | 2 5/8 x 2 5/8 | 1 1/4 | 24 | |||||

802 | 20 | 2 5/8 x 2 5/8 | 1 1/4 | 24 | 12 | 20 | 2 1/2 x 2 3/4 | 1 1/4 | 24 |

803 | 20 | 2 1/2 x 2 1/2 | 1 1/4 | 22 | 11 | 20 | 2 1/2 x 2 3/4 | 1 1/4 | 22 |

804 | 18 | 2 1/2 x 2 1/2 | 1 1/8 | 22 | 10 | 18 | 2 1/2 x 2 1/2 | 1 1/8 | 22 |

805 (*) | 18 | 2 3/8 x 2 3/8 | 1 1/8 | 20 | 9 | 18 | 2 1/2 x 2 1/2 | 1 1/8 | 20 |

806 | 16 | 2 3/8 x 2 3/8 | 1 | 20 | 8 | 16 | 2 1/4 x 2 1/4 | 1 1/8 | 20 |

807 (*) | 16 | 2 1/4 x 2 1/4 | 1 | 18 | 7 | 16 | 2 1/4 x 2 1/4 | 1 1/8 | 18 |

808 | 14 | 2 1/8 x 2 1/8 | 7/8 | 18 | 6 | 14 | 2 x 2 | 7/8 | 18 |

809 | 14 | 2 x 2 | 7/8 | 16 | 5 | 14 | 2 x 2 | 7/8 | 16 |

810 | 12 | 1 7/8 x 1 7/8 | 7/8 | 16 | 4 | 12 | 1 7/8 x 1 7/8 | 7/8 | 16 |

811 | 12 | 1 3/4 x 1 3/4 | 3/4 | 14 | 3 | 12 | 1 7/8 x 1 7/8 | 7/8 | 14 |

812 | 10 | 1 5/8 x 1 5/8 | 3/4 | 12 | 2 | 10 | 1 5/8 x 1 5/8 | 3/4 | 13 |

813 | 8 | 1 3/8 x 1 3/8 | 3/4 | 10 | 1 1/2 | ||||

814 | 7 | 1 1/8 x 1 1/8 | 5/8 | 8 | 1 | 7 | 1 1/8 x 1 1/4 | 1/2 | 9 |

815 | 5 | 1 x 1 | 1/2 | 6 | N/A | ||||

816 | 4 | 7/8 x 7/8 | 3/8 | 5 | N/A |

I have some Grand Rapids which bear no model numbers! 'Tis a puzzle! There is more to life than is listed in the catalogs. Measurements taken from the collection, except as noted.

Spindle Diameter |
Spindle Length |
Jaw Length | Jaw Size |

25 | 24 | 2 1/2 x 3 1/4 | |

3/4 | 15 1/8 | 14 Note 1 |
2 x 1 15/16 |

14 | 12 | 1 7/8 x 1 7/8 |

Notes

1 Steve Piekarczyk (fspic@earthlink.net) was kind enough to share
the dimensions of the 14 incher.

The catalog of 1914 has 6 composite clamps of the Reno design. These are designated 904 through 913. I'm still trying to decipher the image to get all the dimensions

Model | Spindle Diameter |
Spindle Length |
Jaw Length | Jaw Size |

904 | 22 | 18 | ||

906 | 20 | 16 | ||

910 | 16 | 12 | ||

912 | 12 | 10 | ||

913 | 10 | 08 |

last revised and validated

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