Starrett Rigid-Arm Magnetic-Base Indicator Holders
The magnetic base has a flat bottom for mounting on flat metal surfaces and a magnetic release switch for easy setups.
Fine-adjustment attachment (sold separately) can be installed between the upright post and the base to give you more precise control over positioning.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/207/20725a67p1-a01b-digital@halfx_637009626958912070.png?ver=imagenotfound)
Base | Upright Post | Arm | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Mounting Lug Hole Dia. | For Mounting Stem Dia. | Lg. | Wd. | Ht. | Thread Size | Material | Magnetic Pull, lbs. | Dia. | Ht. | Lg. | Dia. | Features | Manufacturer Model Number | Each | |
Lug and Stem Mount | |||||||||||||||
1/4" | 1/4" | 1 57/64" | 1 5/8" | 1 29/32" | 1/4"-20 | Steel | 75 | 3/8" | 7 5/16" | 6" | 0.25" | Magnetic-Release Switch | 657AA | 00000000 | 0000000 |
Fine Adjustment Attachment | 00000000 | Each | 000000 |
Rigid-Arm Magnetic-Base Indicator Holders
![](/prerenderstable/mvPRE/contents/gfx/imagecache/231/2310a1p1-a01b-digital@halfx_637009623286055462.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/231/2310a16p1-a01b-digital@halfx_637009635423501781.png?ver=imagenotfound)
Magnetic-Release Switch
and Fine-Adjustment Arm
![](/prerenderstable/mvPRE/contents/gfx/imagecache/231/2310a104-rev@halfx_ikm0p_1718373822.png?ver=imagenotfound)
Securely mount indicators to metal surfaces with the magnetic base on these holders. They have a switch that releases the magnet for easy setups.
Holders with a fine-adjustment arm have a knob on the arm that lets you precisely adjust the arm’s angle or move the indicator up and down.
Holders with two arms have an extra long reach. Bend them where the two arms meet to change the direction of your indicator. You can also remove an arm if you’re using these holders in a tight space.
Holders with a V-grooved base can be mounted on flat or curved metal surfaces.
Base | Upright Post | Arm | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
No. of Arms | For Mounting Lug Hole Dia. | For Mounting Stem Dia. | Type | Lg. | Wd. | Ht. | Thread Size | Thread Pitch, mm | Material | Magnetic Pull, lbs. | Dia. | Ht. | Material | Lg. | Dia. | Each | |
Lug and Stem Mount | |||||||||||||||||
Magnetic-Release Switch | |||||||||||||||||
1 | 1/4" | 5/32"-1/4" | V-Grooved | 2.559" | 1.97" | 2.165" | M8 | 1.25 | Cast Iron | 176 | 7/16" | 6 7/8" | Steel | 6 1/2" | 0.375" | 000000 | 000000 |
Fine-Adjustment Arm, Magnetic-Release Switch | |||||||||||||||||
1 | 1/4" | 5/32"-1/4" | V-Grooved | 2.559" | 1.97" | 2.165" | M8 | 1.25 | Cast Iron | 176 | 7/16" | 6 7/8" | Steel | 6 1/2" | 0.375" | 0000000 | 00000 |
1 | 1/4" | 5/32"-1/4" | V-Grooved | 2.874" | 1.97" | 2.165" | M10 | 1.5 | Cast Iron | 220 | 13/16" | 14" | Steel | 8 11/16" | 0.472" | 00000000 | 000000 |
1 | 1/4" | 1/4"-5/16" | V-Grooved | 2.953" | 1.97" | 2.165" | M8 | 1.25 | Cast Iron | 220 | 5/8" | 8 7/8" | Steel | 6 1/2" | 0.563" | 0000000 | 00000 |
2 | 1/4" | 3/4" | Flat | 2.375" | 2" | 4.687" | M8 | 1.25 | Cast Iron | 180 | 3/4" | 12" | Steel | 15" | 0.5" | 00000000 | 000000 |
Economy Rigid-Arm Magnetic-Base Indicator Holders
![](/prerenderstable/mvPRE/contents/gfx/imagecache/195/1958a31p1-a01b-digital@halfx_637009608255131049.png?ver=imagenotfound)
The magnetic base has a V-grooved bottom for mounting on flat and curved metal surfaces and a magnetic release switch for easy setups. Use the fine-adjustment knob for precise positioning of the arm.
Base | Upright Post | Arm | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Mounting Lug Hole Dia. | For Mounting Stem Dia. | Lg. | Wd. | Ht. | Thread Size | Thread Pitch, mm | Material | Magnetic Pull, lbs. | Dia. | Ht. | Material | Lg. | Dia. | Features | Each | |
Lug and Stem Mount | ||||||||||||||||
1/4" | 3/8" | 2 5/8" | 2" | 2 15/16" | M8 | 1.25 | Cast Iron | 132 | 7/16" | 6.9" | Steel | 5 13/16" | 0.464" | Fine-Adjustment Arm, Magnetic-Release Switch | 0000000 | 000000 |
Low-Profile Magnetic-Base Indicator Holders
![](/prerenderstable/mvPRE/contents/gfx/imagecache/209/2098a1p1-upa01-@halfx_637606572976969211.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/209/2098a1p1-a01b-digital@halfx_637009636493302200.png?ver=imagenotfound)
Use this holder in areas with limited space. It has a nut and bolt for holding a 1/4” lug-back indicator. The magnetic base has a V-grooved bottom for mounting on curved and flat metal surfaces and a magnetic-release switch for easy setups.
Base | |||||||||
---|---|---|---|---|---|---|---|---|---|
For Mounting Lug Hole Dia. | Lg. | Wd. | Ht. | Material | Magnetic Pull, lbs. | Thread Size | Features | Each | |
Lug Mount | |||||||||
1/4" | 3 1/2" | 1 1/8" | 1" | Steel | 50 | 8-32 | Magnetic-Release Switch | 000000 | 000000 |
Rigid-Arm Magnetic-Base Indicator Holders for Uneven Surfaces
![](/prerenderstable/mvPRE/contents/gfx/imagecache/195/1951a84p1-upa01-@halfx_637606566915428769.png?ver=imagenotfound)
The base is comprised of adjustable magnetic pins which allow it to conform to any shape and grip most metal surfaces. Use the fine-adjustment knob to precisely position the arm.
Base | Upright Post | Arm | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Mounting Lug Hole Dia. | For Mounting Stem Dia. | Lg. | Wd. | Ht. | Thread Size | Thread Pitch, mm | Material | Magnetic Pull, lbs. | Dia. | Ht. | Material | Lg. | Dia. | Material | Features | Each | |
Lug and Stem Mount | |||||||||||||||||
1/4" | 5/32"-3/8" | 1 15/16" | 1 5/8" | 2 7/8" | M8 | 1.25 | Cast Aluminum | 120 | 15/32" | 7 1/16" | Steel | 3 1/2" | 0.469" | Steel | Fine-Adjustment Arm, Magnetic-Release Switch | 0000000 | 0000000 |