Rigid-Arm Magnetic-Base Indicator Holders
The magnetic base has a V-grooved bottom for mounting on flat and curved metal surfaces and a magnetic release switch for easy setups.
Holders with fine-adjustment arm give you more precise control over the arm position.
For technical drawings and 3-D models, click on a part number.
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" | 5/32"-1/4" | 2.559" | 1.97" | 2.165" | M8 | 1.25 | Cast Iron | 176 | 7/16" | 6 7/8" | Steel | 6 1/2" | 0.375" | Fine-Adjustment Arm, Magnetic-Release Switch | 0000000 | 000000 |
| 1/4" | 5/32"-1/4" | 2.559" | 1.97" | 2.165" | M8 | 1.25 | Cast Iron | 176 | 7/16" | 6 7/8" | Steel | 6 1/2" | 0.375" | Magnetic-Release Switch | 000000 | 00000 |
| 1/4" | 1/4"-5/16" | 2.953" | 1.97" | 2.165" | M8 | 1.25 | Cast Iron | 220 | 5/8" | 8 7/8" | Steel | 6 1/2" | 0.563" | Fine-Adjustment Arm, Magnetic-Release Switch | 0000000 | 00000 |
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.
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 |
Fine Adjustment Attachments for Starrett Magnetic-Base Indicator Holders
Install this attachment onto Starrett magnetic-base holders for more precise control over positioning.
| For Arm Dia. | Material | Manufacturer Model Number | Each | |
| 0.5" | Steel | 657W | 00000000 | 000000 |
Economy Rigid-Arm Magnetic-Base Indicator Holders
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 |
Jointed-Arm Magnetic-Base Indicator Holders
Position the arm by adjusting joints at the top, middle, and bottom. The magnetic base has a V-grooved bottom for mounting on curved and flat metal surfaces and a magnetic-release switch for easy setups. Holders have fine-adjustment knobs for precise positioning.
Indicator Holders | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Base | Arm | Replacement Arms | Replacement Clamps | ||||||||||||||
| For Mounting Stem Dia. | Lg. | Wd. | Ht. | Thread Size | Thread Pitch, mm | Material | Magnetic Pull, lbs. | Lg. | Dia. | Features | Includes | Each | Each | Each | |||
Dovetail and Stem Mount | |||||||||||||||||
| 6mm, 8mm, 3/8" | 1 1/2" | 1 1/4" | 1 3/8" | M5 | 0.8 | Cast Iron | 70 | 4 1/4" | 3/8" | Fine-Adjustment Base, Fine-Adjustment Clamp, Magnetic-Release Switch | Swivel Clamp | 00000000 | 0000000 | 00000000 | 000000 | 00000000 | 000000 |
| 6mm, 8mm, 3/8" | 2 3/8" | 1 15/16" | 2 5/32" | M8 | 1.25 | Cast Iron | 176 | 11" | 1/2" | Fine-Adjustment Base, Fine-Adjustment Clamp, Magnetic-Release Switch | Swivel Clamp | 00000000 | 000000 | 00000000 | 00000 | 00000000 | 00000 |
| 6mm, 8mm, 3/8" | 4 3/4" | 1 15/16" | 2 5/32" | M10 | 1.25 | Cast Iron | 290 | 20" | 3/4" | Fine-Adjustment Clamp, Magnetic-Release Switch | Swivel Clamp | 00000000 | 000000 | 00000000 | 000000 | 00000000 | 00000 |
Economy Jointed-Arm Magnetic-Base Indicator Holders
Position the arm by adjusting joints at the top, middle, and bottom. The magnetic base has a V-grooved bottom for mounting on curved and flat metal surfaces and a magnetic-release switch for easy setups. Use the fine adjustment knob on the clamp for precise positioning.
Base | Arm | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Mounting Stem Dia. | Lg. | Wd. | Ht. | Thread Size | Thread Pitch, mm | Material | Magnetic Pull, lbs. | Lg. | Dia. | Features | Each | |
Dovetail and Stem Mount | ||||||||||||
| 3/8" | 2 1/2" | 2" | 2 3/16" | M8 | 1.25 | Cast Iron | 132 | 13 1/2" | 0.464" | Fine-Adjustment Clamp, Magnetic-Release Switch | 000000 | 000000 |
Flexible-Arm Magnetic-Base Indicator Holders
and Fine-Adjustment
Clamp
Adjust the flexible arm to nearly any position. These holders have a ball-and-socket segmented arm that locks in place with a lever. The magnetic base has a release switch for easy setups.
Holders with V-grooved base can be mounted on both curved and flat surfaces.
Holders with fine-adjustment base or clamp give you more precise control over positioning.
Indicator Holders | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Base | Arm | Replacement Arms | |||||||||||||
| For Mounting Stem Dia. | Type | Lg. | Wd. | Ht. | Thread Size | Thread Pitch, mm | Material | Magnetic Pull, lbs. | Lg. | Dia. | Features | Each | Each | ||
Dovetail and Stem Mount | |||||||||||||||
| 3/8" | V-Grooved | 2" | 2 1/2" | 2 5/8" | 5/16''-18 | __ | Steel | 90 | 15 1/4" | 0.625" | Fine-Adjustment Clamp, Magnetic-Release Switch | 00000000 | 0000000 | 00000000 | 0000000 |
Stem Mount | |||||||||||||||
| 1/8"-1/2" | Flat | 2" | 1 5/8" | 2" | __ | __ | Steel | 65 | 14" | 0.625" | Fine-Adjustment Base, Magnetic-Release Switch | 00000000 | 000000 | 00000000 | 000000 |
| 5/32"-1/2" | V-Grooved | 2 1/2" | 2" | 2 1/4" | M8 | 1.25 | Steel | 180 | 12 1/2" | 0.63" | Magnetic-Release Switch | 0000000 | 00000 | 0000000 | 00000 |
Magnetic Bases
Use the threaded mounting hole on these bases to hold upright posts and fixtures. Bases have a magnetic-release switch for easy setups.
V-grooved bases can be mounted on both curved and flat metal surfaces.
Base | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Ht. | Thread Size | Thread Pitch, mm | Material | Magnetic Pull, lbs. | Mounting Hole Location | Features | Each | |
Flat | ||||||||||
| 1 3/16" | 1 3/16" | 1 3/16" | M5 | 0.8 | Cast Iron | 38 | Top | Magnetic-Release Switch | 0000000 | 000000 |
| 4 3/4" | 2 3/8" | 2 1/16" | M8 | 1.25 | Cast Iron | 337 | Top | Magnetic-Release Switch | 000000 | 000000 |
V-Grooved | ||||||||||
| 2 5/8" | 2" | 2 3/16" | M8 | 1.25 | Cast Iron | 176 | Top | Magnetic-Release Switch | 000000 | 00000 |
| 3" | 2" | 2 3/16" | M8 | 1.25 | Cast Iron | 220 | Top | Magnetic-Release Switch | 0000000 | 00000 |
| 4 5/8" | 2" | 2 3/16" | M10 | 1.5 | Cast Iron | 292 | Top | Magnetic-Release Switch | 0000000 | 000000 |
Starrett Magnetic Bases
The threaded mounting holes on this base hold upright posts and fixtures. It has a flat bottom for mounting on flat metal surfaces and a V-step at the top of the base for mounting on round surfaces. The magnetic-release switch allows for easy setups.
Economy Magnetic Bases
This magnetic base has a threaded mounting hole to hold upright posts and fixtures. It has a V-grooved bottom for mounting on curved and flat metal surfaces and a magnetic-release switch for easy setups.
Low-Profile Magnetic Base Holders with Positioning Arm
Use a swivel clamp (not included) to attach an indicator to the positioning arm. These holders are often used in areas with limited space. They have a magnetic base with a V-grooved bottom for mounting on curved and flat metal surfaces and a magnetic-release switch for easy setups.
Style A has a fine-adjustment knob on the arm for precise positioning.
Style B has a pivoting arm attached to an adjustable sliding block. Use the fine-adjustment knob on the sliding block for precise positioning. The arm can be removed to hold a 1/4” lug back.
Base | Arm | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Style | Type | Lg. | Wd. | Ht. | Material | Magnetic Pull, lbs. | Dia. | Flexibility | Lg. | Material | Features | Each | |
| A | V-Grooved | 3 1/2" | 1 1/8" | 1" | Stainless Steel | 50 | 0.25" | Rigid | 6" | Steel | Fine-Adjustment Arm, Magnetic-Release Switch | 000000 | 000000 |
| B | V-Grooved | 3 1/2" | 1 1/8" | 1 1/2" | Stainless Steel | 50 | 0.25" | Rigid | 6" | Steel | Fine-Adjustment Arm, Magnetic-Release Switch | 000000 | 000000 |
Low-Profile Magnetic-Base Indicator Holders
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 |
Flexible-Arm Magnetic-Base Indicator Holders for Uneven Surfaces
A flexible ball-and-socket segmented arm adjusts to nearly any position and locks in place with a lever. The base is comprised of adjustable magnetic pins which allow it to conform to any shape and grip most metal surfaces. It has a magnetic-release switch for easy setups.
Base | Arm | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Mounting Stem Dia. | Lg. | Wd. | Ht. | Thread Size | Thread Pitch, mm | Material | Magnetic Pull, lbs. | Lg. | Dia. | Material | Features | Each | |
Stem Mount | |||||||||||||
| 5/64"-1/2" | 1 15/16" | 1 5/8" | 2 7/8" | M8 | 1.25 | Cast Aluminum | 120 | 12 1/2" | 0.47" | Steel | Magnetic-Release Switch | 0000000 | 0000000 |
Rigid-Arm Magnetic-Base Indicator Holders for Uneven Surfaces
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 |
Clamp-On Indicator Holders
Attach the C-clamp on these holders to your milling machine head to take indicator measurements without obstructing the cutting tool. Use the fine-adjustment rod to precisely position the arm.
Overall reach is the distance from the center of the C-clamp to the end of the arm when both are extended.
For technical drawings and 3-D models, click on a part number.
Clamp-On Indicator Holders for Bridgeport J Heads
Attach the C-clamp on this holder to your Bridgeport J head to take indicator measurements without obstructing the cutting tool. Use the fine-adjustment rod to precisely position the arm.
Overall reach is the distance from the center of the C-clamp to the end of the arm when both are extended.
For technical drawings and 3-D models, click on a part number.
Flexible-Arm Clamp-On Indicator Holders
Vise-grip locking pliers clamp this holder to most thin, flat surfaces, and the flexible arm lets you position your indicator around obstructions. Lock the arm in place with a lever.
Indicator Swivel Clamps
Secure indicators, upright posts, attachments, and holding rods at any angle. For use with both plunger- and lever-style indicators.
For technical drawings and 3-D models, click on a part number.
Dia. | ||||
|---|---|---|---|---|
| (A) | (B) | Adjustment Type | Each | |
Steel | ||||
| 1/4" | 1/4" | Knob | 0000000 | 000000 |
| 5/16" | 5/32" | Knob | 0000000 | 00000 |
| 5/16" | 1/4" | Knob | 0000000 | 00000 |
| 5/16" | 5/16" | Knob | 0000000 | 00000 |
| 3/8" | 1/4" | Knob | 0000000 | 00000 |
| 3/8" | 5/16" | Knob | 0000000 | 00000 |
| 3/8" | 3/8" | Knob | 0000000 | 00000 |
| 1/2" | 3/8" | Knob | 0000000 | 00000 |
| 8mm | 8mm | Knob | 0000000 | 00000 |
| 10mm | 8mm | Knob | 0000000 | 00000 |
| 10mm | 10mm | Knob | 0000000 | 00000 |
| 12mm | 10mm | Knob | 0000000 | 00000 |
Stainless Steel | ||||
| 1/4" | 1/4" | Knob | 0000000 | 00000 |
| 3/8" | 1/4" | Knob | 0000000 | 00000 |
| 3/8" | 3/8" | Knob | 0000000 | 00000 |
Dia. | ||||
|---|---|---|---|---|
| (A) | (B) | Adjustment Type | Each | |
Steel | ||||
| 3/8" | 3/8" | Wing Nut | 0000000 | 000000 |
| 3/8" | 1/2" | Wing Nut | 0000000 | 00000 |
| 1/2" | 1/2" | Wing Nut | 0000000 | 00000 |
| 1/2" | 5/8" | Wing Nut | 0000000 | 00000 |
| 5/8" | 5/8" | Wing Nut | 0000000 | 00000 |
| 5/8" | 3/4" | Wing Nut | 0000000 | 00000 |
| 3/4" | 3/4" | Wing Nut | 0000000 | 00000 |
| 10mm | 12mm | Wing Nut | 0000000 | 00000 |
| 12mm | 12mm | Wing Nut | 0000000 | 00000 |
| 14mm | 12mm | Wing Nut | 0000000 | 00000 |
Stainless Steel | ||||
| 3/8" | 3/8" | Wing Nut | 0000000 | 00000 |
| 1/2" | 1/2" | Wing Nut | 0000000 | 00000 |
Dia. | ||||||
|---|---|---|---|---|---|---|
| (A) | (B) | (C) | Adjustment Type | Number of Dovetail Mounts | Each | |
Stainless Steel | ||||||
| 1/4" | 1/8" | 1/4" | Knob | 1 | 0000000 | 000000 |
Shaft Alignment Chain Clamps
Install a test indicator on each holding rod to check for shaft misalignment.
Body | Mounting | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Chain Lg. | Lg. | Wd. | Body Material | Hole Location | Fasteners Included | No. of Holes | Hole Thread Size | Includes | Each | |
| 1"-6" | 24" | 3 5/8" | 3/4" | Stainless Steel | Side | Yes | 3 | 1/4"-28 | ANSI No. 41 Chain (6" Dia. Capacity) One 5/16" Dia. x 3-1/4" Lg. Stainless Steel Holding Rod One 5/16" Dia. x 6-1/2” Lg. Stainless Steel Holding Rod | 00000000 | 0000000 |
| 0"-9" | 24" | 3" | 3" | Aluminum | __ | __ | __ | __ | ANSI No. 41 Chain (9” Dia. Capacity) One 5/16” Dia. x 3” Lg. Stainless Steel Holding Rod One 5/16” Dia. x 6” Lg. Stainless Steel Holding Rod | 0000000 | 000000 |
Shaft Alignment Chain Clamp Kits
Kit includes two chain clamps, an inspection mirror, and a case. Pair this kit with your own test indicators to check for shaft misalignment.
| For Shaft Dia. | Container Type | Includes | Each | |
| 0"-9" | Case | Inspection Mirror, Two Chain Clamps | 0000000 | 0000000 |
Starrett Dial-Indicator Shaft Alignment Chain Clamp Kits
Two chain clamps position two Starrett test indicators at different points along a shaft to find any misalignment. The easy-to-read dials offer more precise measurement than stylus indicators.
Dial Indicator | |||||||
|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Manufacturer Model Number | Measuring Increments | Measuring Range | Container Type | Includes | Each | |
| 0"-9" | 196B1 | 0.001" | 0"-0.2" | Case | Dial Indicator, Inspection Mirror, Two Swivel Clamps | 0000000 | 000000000 |