Alignment Tools | McMaster-Carr

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4,288 Products

Measuring and Inspecting

Alignment Pins

Line up holes in sheet metal, I-beams, and angle irons for bolting, riveting, and welding

148 products

Shaft Alignment Kits

Confirm that shafts are aligned or measure the degree of their misalignment

9 products

Alignment Lasers

Project a dot, line, or crosshair line as a reference point to position equipment

61 products

Lathe Alignment Bars

Confirm that your lathe headstock and tailstock are aligned for accurate machining

1 product

Levels

Ensure surfaces are completely horizontal or vertical

188 products

Laser Levels

Project level references onto surfaces when installing drop ceilings, pipe, or conveyors

22 products

Pipe Flange Aligners

Line up flange holes so they bolt securely and connections won’t leak

21 products

Band Saw Blade Alignment Gauges

Keep band saw blades straight between guides

1 product

Plumb Bobs

Suspend from a string to create a vertical reference line

10 products

Inspection Parallels

Line up workpieces for precise machining, or support them at a level height for inspecting

8 products

Level Mounts

Strap to nonmagnetic surfaces to attach a magnetic level

2 products

Inspection Setup Blocks

Line up workpieces at precise heights and angles for machining, measuring, and inspecting

2 products

Inspection V-Blocks

Cradle rods and other round workpieces for precision measuring or inspecting

10 products

Laser Directing Components

Turn or split dot lasers to point them where needed

12 products

Plumb Bob Reels

Retrieve your plumb bob without tangles and quickly retract the cord

3 products

Level Vials

Replace vials in levels or equipment

16 products

Blade Balancers

Confirm your rotary blades are balanced for smooth, vibration-free cutting

1 product

Square Holding Clamps

Position squares for repeat checking and marking

1 product

Threaded Hole Location Gauges

Pinpoint the true center of threaded holes to precisely align and measure parts

70 products

Squares

Check 90° angles during layout work with combination, angle, or pipefitters' squares

114 products

Angle Indicators

Align pipe and other equipment by measuring angle, level, or tilt

24 products

Calibration Squares

Lay horizontally or vertically on CNC machines to check the position of tools with high precision

2 products

Laser Targets

Stick to uneven, clear, or mirrored surfaces to make your laser beam easier to see

2 products

Squareness Gauges

Check frames and machined parts to see if they are leaning or uneven

3 products

Combination Square Heads

Attach combination square blades to form a combination square

28 products

Coordinate Measuring Machine Plates and Fixtures

Raise workpieces and position them on a fixture plate

126 products

Bench Centers

Inspect cylindrical parts for irregularities that could cause wobbles or vibrations

5 products

Combination Square Blades

Connect to a combination square head to create a combination square

17 products

Coordinate Measurement Machine Probes

Take 3D measurements of workpieces on your CMM or CNC machine to inspect for quality

50 products

Rivet Hole Locators

Mark even spacing for rivets and other fasteners before you drill

1 product

Center Punch/Angle Indicators

Find the center of pipe and other parts and determine setup angles on milling machines and grinders

5 products

Fabricating and Machining

Vise Jaws

Hold material in vises for machining

115 products

Vises

Secure workpieces in place

253 products

Vise Tube Holders

Grip tubing in place while you cut, flare, or expand the end

2 products

Vise Jaw Liners

Place over vise jaws to protect workpieces from marring

50 products

Vise Stops

Prevent horizontal movement within machine vises to keep workpieces in place

5 products

Vise Bases

Hold and rotate a vise

2 products

Vise Handles

Replace handles in vises

5 products

Vise Repair Kits

Replace commonly worn parts in vises

Panel Alignment Clamps

Align and hold sheet metal panels for drilling, riveting, and welding

20 products

Toggle Clamps

Lock workpieces onto worktables or objects

438 products

C-Clamps

Temporarily secure workpieces together or to a work surface

131 products

Magnetic Clamps

Hold magnetic workpieces at common angles such as 90° or 45°

30 products

Clamping Screw Mounting Bases

Thread clamping screw clamps into the holes to hold workpieces

7 products

Clamping Screws

Apply pressure through a flat-tipped screw to hold material in place

47 products

Corner Clamps

Align and secure materials at a corner joint

4 products

Band Clamps

Secure round and oddly shaped workpieces

2 products

Pliers Clamps

Clamp and lock workpieces with plier-style jaws for secure handling or transport

35 products

Spring Clamps

Hold lightweight materials in place, then squeeze to release

41 products

Pipe Welding Clamps

Position and hold pipe joints for welding and assembly

14 products

Bar Clamps

Secure large materials with adjustable arms for even pressure distribution

92 products

Holders for Locking Pliers

Secure to a table or benchtop and slide in locking pliers for a hands-free way to hold your work

1 product

Electronic-Component Positioning Stands

Pin components against a circuit board to free up your hands for soldering

1 product

Dovetail Blanks

Machine a blank workpiece with precut dovetails and locating slots for easy setup

5 products

Magnetic Workholding Plates

Keep metal workpieces firmly in place for grinding, drilling, and electrical discharge machining

72 products

Fixture Tables

Add clamps, brackets, and other components to build fixtures for welding and assembly

70 products

Rotary Angle Indexers

Position round workpieces at precise, repeatable angles for machining flats, hexes, and key slots

2 products

T-Slot Clamp Supports

Hold up clamps to keep them in place when they're unclamped

7 products

Fixture Clamps

Secure your workpiece to a fixture table so it won't move during machining

439 products

Support Blocks

Support setup clamps for quick height adjustments

16 products

Pin Removal Blocks

Remove a range of pin sizes from workpieces by tapping them into holes with a punch and hammer

1 product

V-Blocks

Hold round workpieces

72 products

Parallel Keepers

Keep parallels in place against vise jaws

3 products

Index Plungers

Align parts that have mating bushings for more precision than standard spring plungers

6 products

Parallels

Raise workpieces above your vise to create clearance for cutting tools

92 products

Slotted Bushings

Pair with a standard bushing to prevent alignment pins from binding in your fixture

34 products

Grid Fixture Plates

Use threaded and unthreaded holes to position workpieces for precise and repeatable machining

63 products

Fixture Kits

Everything needed to mount workpieces of different sizes to your machine table

50 products

Spring Locating Pins

Apply side force to workpieces to clamp them in place

52 products

Locating Pins

Install in fixturing plates or tables to position and secure workpieces

204 products

Fixture Squares

Build different fixtures on multiple sides of the same block

38 products

Work Supports

Reduce vibration and deformation by adjusting to secure your workpiece

20 products

Drill Bit Guides

Drill precise holes without building a fixture

15 products

Alignment Locks

Precisely align your mold halves

25 products

Material Handling

Railway Track Aligners

Push or pull rails to correct spacing after a derailment and when installing gauge tie rods

1 product

Railcar Derailers

Protect people, buildings, and other freight cars from uncontrolled railcar movements

1 product

Railcar Rerailers

Guide derailed wheels back onto tracks

2 products

Routing Clamps

Secure routed lines of pipe, tubing, and conduit

690 products

Forklift Fork Level Indicators

Mount to your forklift's mast to check if forks are level from the driver's seat

1 product

Power Transmission

Roller Chain Alignment Tools

Align sprockets and roller chain during installation and adjustment

1 product

Rod Alignment Couplers

Reduce wear on bearings and seals by flexing when the cylinder and load aren't precisely even

94 products

Fluid Handling

Pipe Joiners

Connect heavy and difficult-to-position gasketed pipe without powered equipment

1 product

Building and Machinery Hardware

Tripods

Stabilize cameras and other equipment

4 products

Fastening and Joining

Standoffs

Separate, position, or connect components in assemblies

18 products