Round Dampers | McMaster-Carr

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DFARS Specialty Metals

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Shaft Diameter

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Hardness Rating

Diameter

Performance

Electrically Insulating

10,686 Products

Heating, Ventilation, and Air Conditioning

Duct Airflow Dampers

Regulate airflow to sections of duct

94 products

Diffuser Dampers

Regulate the airflow coming out of drop-ceiling diffusers

10 products

Duct Blast Gates

Slide open and closed to control flow of air and material

150 products

Registers

Direct and control airflow coming out of HVAC systems

39 products

Barometric Draft Dampers

Maintain consistent airflow in your furnace to improve its performance

6 products

Duct Fire Dampers

Automatically close at high temperatures to help prevent the spread of fire through duct

8 products

Diffusers

Evenly disperse airflow into a room to maintain a consistent temperature throughout

70 products

Duct and Fittings

Circulate air through HVAC systems using round, rectangular, and fabric duct

16 products

Louvers

Allow air to circulate through doors, walls, roofs, and enclosures

40 products

Diffuser Collars

Connect diffusers to duct

4 products

Duct Damper Actuators

Automatically adjust duct dampers to regulate airflow

5 products

Building and Machinery Hardware

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

1,243 products

Surface Guards

Protect walls and other flat surfaces from impact

1 product

Crane Bumpers

Resist heavy hits on cranes to protect walls or beams and extend crane life

20 products

Grommets

Protect wire, cable, and cords from holes with sharp or rough edges

477 products

Tubing Guards

Safeguard pipe, tubing, and other round equipment from impact

2 products

Door Silencers

Close doors quietly and keep them from rattling in their frames

3 products

Corner Guards

Shield corners on walls and other surfaces from impact

21 products

Door Stops

Keep doors from slamming into and damaging walls

66 products

Knobs

Position, tighten, and secure fixtures and equipment

5 products

Cam Latches

Secure drawers, cabinets, mailboxes, and other enclosures

79 products

Protective Feet

Add to furniture and light equipment to protect floors from scratches and wear

5 products

Leveling Mounts

Level machines and workbenches on uneven surfaces, reduce vibration, and protect floors

234 products

Vibration-Damping Mounts

Attach to machinery to reduce vibration and noise and extend service life

556 products

Vibration-Damping Pads

Place under machinery to reduce vibration and noise, extending service life and protecting floors

11 products

Damper Control Arms

Connect actuating motors to your duct system to control ventilation dampers

3 products

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

167 products

Measuring and Inspecting

Force Gauges

Test objects to see how much tension and compression force they can bear

11 products

Raw Materials

Foam

Pockets of air make it lighter in weight than rubber; good for packing, insulating, and sealing

153 products

Rubber

Compresses and bounces back to shape; often used for sealing, cushioning, and shock absorbing

661 products

Felt

Thicker and more absorbent than fabric for insulating, polishing, cushioning, and gasketing

33 products

Fastening and Joining

Spacers

Unthreaded to create space between two surfaces or objects, often to align them

29 products

Standoffs

Separate, position, or connect components in assemblies

2 products

Sealing Washers

Prevent fluids from leaking around fasteners

363 products

Cushioning Washers

Cushion joints to dampen vibration and protect them from wear

139 products

Insulating Washers

Isolate screws from electrical current and prevent corrosion from mating different metals

10 products

Fluid Handling

Pump Pulsation Dampers

Absorb vibration from air-powered pumps to reduce wear and protect inline regulators and gauges

5 products

Hydraulic Accumulators

Maintain pump flow, stabilize pressure, and absorb shock during pump failure

19 products

Pipe and Pipe Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases through your facility

159 products

Power Transmission

Air Springs

Absorb vibration in moving equipment such as conveyors and transfer stations; lift and level loads

24 products

Shear Couplings

Sever the connection between shafts when there's too much torque to protect parts from breaking

21 products

Gas Springs

Support the weight of doors, hatches, and lids to assist opening and closing

812 products

Extension Springs

As stretched, springs become increasingly harder to pull

97 products

Shaft Couplings

Connect two shafts to transfer rotary motion from one to the other

146 products

Speed Limiters

Control the speed of movement for attached components such as doors, panels, and drill presses

6 products

Shock Absorbers

Slow and stop loads to reduce impact that can damage equipment like conveyors, lifters, and presses

75 products

Sleeve Bearings

With no moving parts, the plainest type of bearing

47 products

Ball Bearings

Create less friction than other bearings for use at high speeds

19 products

Mounted Bearings

Ball, roller, and sleeve bearings ready to bolt in place

18 products

Compression Springs

When squeezed, springs push back to their original length

2,792 products

Spring Assortments

Keep extension, compression, and torsion spring types of various sizes on hand

7 products

Die Springs

Withstand heavy loads with minimal compression in high-impact jobs such as punching and stamping

484 products

Made-to-Order Compression Springs

If you can't find the exact size spring you need, we'll get it made for you

80 products

Material Handling

Vacuum Lifter Dampers

Stick onto vacuum lifters to create a soft surface for moving delicate parts

2 products

Loop Clamps

Hold pipe snug against the mounting surface to prevent movement that may cause breakage

324 products

U-Bolts

Anchor heavy pipe, tube, and conduit; stronger than routing clamps and hangers

109 products

Pipe Hangers

Suspend pipe, conduit, and tube from rods, hooks, and straps

144 products

Vibration-Damping Hangers

Reduce vibration and noise in suspended equipment, such as air-handling units, pipe, and duct

8 products

Routing Clamps

Secure routed lines of pipe, tubing, and conduit

361 products