Miracle Instrument Co.

800-526-4772

860-642-6852

Miracle Instruments Garage Door Opener Miracle Instruments Chuck Keys and Lathe Wrenches Miracle Instruments Multi-Vue Level

Positive Protection Against Flying Keys and Wrenches
Safety Chuck Keys

Standard Chuck Keys

Safety/Standard Lathe Wrenches		 Jacobs multi-craft replacement chucks

Jacobs ball bearing geared key super chucks

Industrial quality heavy duty drill chucks

Miracle Self-Ejecting Safety Chuck Keys
  • Approved and endorsed for use in the entire New York City School System
  • Engineered to fit Jacobs and Supreme key-operated chucks
  • Manufactured to precision standards from cold rolled steel
  • Heat-treated and plated to resist corrosion
  • Approved by leading casualty insurance companies
  • Approved by New York State Board of Standards and Appeals No. 4186
Miracle Safety Key # FITS
Supreme Chuck Numbers		 Miracle Safety Key # FITS
Jacobs Chuck Numbers
K0 0J, 0T0 K0 0, 0B
K1 1J, 1A, 1T1, S1A, H1A, HM1A K1 1A, 1B, MC1, 1BS, MC1AD
K2 2A, 2B, 2TB, 2T2, H2A K2 2A, 2B, MC5
K3 6B, 6C, 6D, 6F, 6G, 6T2, 6T6, 6T6P, 6T33, 8D, 8F, 8T3, 23T3, 24T3 K3 3, 3A, 3AE, 3B, 3KD, 3PD, 6A33, 6AE, 6A-2A, 6B, 34, 34B, 55B, 56B, 58B, 75A, 14N, 34KD, 34KP, 633C, 633D
K3C 6T33E K3C 633C, 633D
K7 4A, 4B, 4C, 4T1, 4T2 K7 7, 7-1A, 7B
K30 7A, 7B, 7T1, 7T2, H13A, B14B, B14T33 K30 30, 30A, 30B, 8½N, MC4
K32 3A, 3B, 3D, 3T2, 5A, 5B, 5D, 5T33, 5T33C, 5T33T, 15T33, H5B, H5T33, H5, H15T33, H15 K32 32, 32B, 33, 33B, 3326, 11N, MC10, MC33, MC3326, 3333C
K32C 5T33C, 15T33C K32C 333C
K4 9D, 9F, 9T3, 25T4, 34T3 K4 36, 36E, 36B, 59B, 16N, 18N, 37KD, 37PD
K5 26T5 K5 20N
KG BM1A, B1A, B80A, BM80A KG MC1G61, MC1G41, MC2, U4G61, U4G60, U4G41
KK B13A, BM13A, B14B, B14T33, B16A, B16B, B16T33 KK MC4K61, MC4K01, MC4K41, MC8K64, MC8K33, MC8K61, U8K61, U8K64, U8K33
-- -- KR MC10R64, MC33R33


Standard Chuck Keys
Miracle (Supreme) Jacobs Miller Falls Black & Decker Chuck Capacity Pilot Diameter Pack
DB-1A K3GA -- U1529 ¼ 15/64 10
DB-1 KG MK2 U1529 ¼ 15/64 10
D-1 K-1 MK1 U1507 ¼ 5/32 10
D-13 K-30 2MK1 U1524 5/16-3/8 15/64 10
DB-13 KK 2MK2 U1533 3/8-1/2 9/32 10
D-2 K-2 2MK3 -- 3/8 ¼ 10
D-4 K-7 MK3 -- ¼ 7/32 10
D-5 K-32 3MK1 U1508 ½ ¼ 10
DB-5 KR 3MK1A U1531 ½ 11/32 10
D-6 K-3 3MK2 -- ½ 5/16 10
D-8 -- -- 70-110 3/8 13/64 10
0 K0 -- -- 5/32 1/8 10
D2K Keyholder (Fits all keys) 10
9 K-4 -- -- ¾ 3/8 1
26 K-5 -- -- 1 7/16 1


Safety & Standard Lathe Wrenches
Miracle Self-Ejecting Safety/Standard Lathe Wrenches Engineered To Fit All Makes Of Chucks
  • Approved by New York State Board of Standards and Appeals No. 4187.
  • Approved and endorsed for use in the entire New York City School System.
  • No more serious and critical injuries to employees or machines.
  • Prevents burdensome increased compensation costs.
  • No more lost man hours.

Place an 'S' after Model Number when ordering standard wrenches.
Model # Dimensions
A B C
125 7/32 2-3/8 3-1/8
126 1/4 3-1/2 4
127 9/32 3-1/2 4
128 9/32 4-1/2 5
128A 5/16 4-1/2 5
129 3/8 3 6
129A 3/8 5-1/2 6
130 13/32 3-3/4 6
130A 13/32 5-3/4 6
131 13/32 8-1/8 6
132 13/32 12 10
132A 7/16 6 10
132B 15/32 8-1/16 10
133 1/2 5-1/8 8
134 1/2 8-1/6 12
135 1/2 11 11-1/2
Model # Dimensions
A B C
136 1/2 14-5/8 11-1/2
137 1/2 18-1/2 11-1/2
138 9/16 5-1/8 12
139 9/16 8-9/16 11-1/2
140 9/16 9-7/16 14
141 9/16 11-1/6 11-1/2
142 9/16 13-13/16 11-1/2
143 9/16 17 18
144 9/16 18-9/16 11-1/2
145 5/8 10-1/4 20
146 11/16 12 14
147 3/4 9-7/8 18
148 3/4 12 20
149 3/4 13-5/16 18
150 3/4 17-5/6 18


Jacobs multi-craft replacement chucks
Miracle Chuck# Jacobs Chuck # Capacity Mount Miracle Key #
MC600 SM1G61 0-1/4 3/8-24 DB-1
MC610 C-DC4G61 1/16-3/8 3/8-24 DB-1
MC620 SM8K61 5/64-1/2 3/8-24 DB-13
MC630 SM8K64 5/64-1/2 1/2-20 DB-13
MC640 SM8K33 5/64-1/2 #33 Jacobs Taper DB-13
MC650T DC8K33 5/64-1/2 #33 Jacobs Taper DB-13


Jacobs ball bearing geared
key super chucks
Miracle Chuck# Jacobs Chuck# Capacity Chuck Taper Miracle Key #
22T2 11N 0-3/8 2* D-5
23T3 14N 0-1/2 3* D-6
24T3 16N 1/8-5/8 3* #9
25T4 18N 1/8-3/4 4* #9
26T5 20N 3/8-1 5* #26
Adapter 110 -- 3/8x24 thread
Adapter 112 -- 1/2x20 thread


Industrial quality heavy duty drill chucks
No. Capacity Mount Replaces Jacobs Replaces Supreme Miracle Key #
C-514 0-1/4" 3/8-24 DC1G61 D1A, BM1A, DB1A, DBM1A DB1
C-538 1/16"-3/8" 3/8-24 DC4G61, MC4K61, MC4K41, U4G41 B13A, DB13A, BM13A, B80A, BM80A, DMB13A DB1
C-512 5/64"-1/2" 3/8-24 DC8K61, MU8K61 DB16AX, DB16A, B16A DB13
C-520 5/64"-1/2" 1/2-20 MU8K64, DC8K64, 33B DB14BX, B14B, DB14B, 5B DB13
Replacement for: Black & Decker, Craftsman, Penny's, Wen, Rockwell, Skill, McGraw, Milwaukee, and most other drills.


Manufactured in USA
Miracle Instruments - Line
Route 207 - 1667 Exeter Rd. Lebanon, Connecticut 06249
Copyright 1998 Miracle Instruments - All Rights Reserved
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