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 |
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 |
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 |
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 |
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 |
Low-Profile Magnetic-Base Indicator Holders with Multiple Mounting Locations
For more versatility than other low-profile holders, this holder has six locations for mounting indicators and accessories, including two mounting holes and four places to mount an indicator lug back with the included thumb screws. Use it in areas with limited space. The magnetic base has a V-grooved bottom for mounting on curved and flat metal surfaces.
For technical drawings and 3-D models, click on a part number.
For Stem Dia. Mounting Hole | Base | |||||||
|---|---|---|---|---|---|---|---|---|
| Unthreaded Round | Unthreaded V-Shape | Type | Ht. | Material | Magnetic Pull, lbs. | Mount Type | Each | |
| 3/8" | 1/8"-5/16" | Flat | 1 1/16" | Zinc | 45 | Stem | 00000000 | 000000 |
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 |
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 |
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.
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 |
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.
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.
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.
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.
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 |
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 |
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 |