Best Roller Screw Actuators

AOSKY Cordless Roller Shades Blackout Blinds for Windows Room Darkening Rolled Up Shades with Spring System, UV Protection Window Shades Door Blinds for Home and Office (23" W x 72" H, Grey)

【New Innovative Design】: The cordless design is safer for kids and pets. The cordless roller blinds are more convenient than corded roller blinds. Built-in the robust spring-loaded mechanism, which has passed 5,000 times usual lifting or pulling down tests for each blind, You can stop the shade wherever you want smoothly. Open the roller blind, pull it to the place.
Shut the roller blind, you can gently pull the buckle, and the roller blind would automatically close..
【How to choose right size】：To make sure to cover the entire window, outside mount shades need to be 4 inches wider than windows wide. If your windows width is 30", order size 34" would be okay for outside....

Only hardware,not including ladder,not including floor roller.
Roller is 10° bent to make it sutable for ladder.
Track had been pre-drilled holes for track&wall connector("+" across screw tight on the wall/cabinet).
Package's including:Roller*2,Stop*2,4FT track*1,track&wall connector*2,end cap*2.

Ladder and Floor roller are NOT included.
10FT is 2pcs 5ft track with a connector,Only top sliding hardware,not including ladder and floor roller.
Roller is 10° bent to make it sutable for ladder.
Track had been pre-drilled holes for track&wall connector("+" across screw tight on the wall/cabinet).
Package's including:Roller*2,Stop*2,5ft track*2,joint-in track connector*1,track&wall connector*8,thick spacer*8,end cap*2.

Only hardware,not including ladder and floor roller.
Roller is 10° bent to make it sutable for ladder.
Track had been pre-drilled holes for track&wall connector("+" across screw tight on the wall/cabinet).
Package's including:Roller*2,Stop*2,4ft track*2,track connector*1,track&wall connector*6,thick spacer*6,end cap*2.

Built-in CM miniature limit switch, strong aluminum cast shell, design for water-proof and oil-proof.
It is the same as CM micro switch in the rated value and characteristics.
Various of actuators that are taken convenience for using.
Each switch is equipped with cable fixator, including rubber boot, metallic washer, plastic screw nut.

ENOUGH SCREWS: There are 10pcs female and male skating screws in a pack, suitable for inline skating wheels. Note: Both ends of the screw rod and nut must be inserted 4mm hex wrench to screw, and if only use an hex wrench, then it will turn with the However, and will not screw tightly..
TWO SIZE: 31mm skating screw is the perfect replacement for the front wheel. 36mm skating screw is the perfect replacement for the rear wheel and brake bolt..
DURABLE & STURDY: Made of high quality iron with coating on the connecting part, it is durable, sturdy and not easy to loosen. Good to improve the service life and durability of the bearing. Easy to solve the straight line roller skating damage..
EASY TO INSTALL: Only suitable for skating shoes required the male and female screw fittings on the wheel. You can easily fix the two ends of the shoes with the hexagonal installation tool.
INLINE SKATE WHEEL SCREWS: In order to outdoor skating safely, you need to replace the broken inline skate screws regularly. These inline roller skate wheel socket screws are small in size, easy and portable for you to carry and store.

The ROP Shop replacement 2" White Nylon Roller with 6200ZZ Bearing Offer Softer, Quieter Garage Door Use.
Specs - Roller Diameter: 1 13/16" for a 2" track. Roller Thickness: 1/2". Stem Length: 4 1/8" (3.5" from bevel). Stem Diameter: 7/16". Single Load: 150lbs. Bearing Type: 6200ZZ Precision. Roller Material: Nylon. Roller Color: White. Refer to images 2 & 3 for more information.
Rollers are constructed from nylon that is softer and quieter than plastic or metal rollers and smoother than original equipment rollers. Features a reinforced dual-wall bearing cage, sealed 6200ZZ ball bearing plus double plating thickness on stem designed for max performance and ultra-life weather protection. Garage door roller can reuse 100,000 cycles.
Installation Tips - Method 1: Slightly bend track at the seam to remove, replace roller and move the door to do the next roller (repeat on other side). Method 2: Remove screws that attach brackets to your door, secure cable before releasing the bottom brackets that are under the cable spring tension, then clamp the cable to the track, slide out old rollers, place new rollers in their place and screw in backers.

The ROP Shop replacement 2" Nylon Roller with 11-Ball Bearing for Residential & Commercial Garage Door.
Specs - Roller Diameter: 1 13/16" for a 2" track. Roller Thickness: 1/2". Stem Length: 4 1/8" (3.5" from bevel). Stem Diameter: 7/16". Single Load: 150lbs. Bearing Type: 6200ZZ Precision. Roller Material: Nylon. Roller Color: White. Refer to images 2 & 3 for more information.
Rollers are constructed from nylon that is softer and quieter than plastic or metal rollers and smoother than original equipment rollers. Features a reinforced dual-wall bearing cage, sealed 6200ZZ ball bearing plus double plating thickness on stem designed for max performance and ultra-life weather protection. Garage door roller can reuse 100,000 cycles.
Installation Tips - Method 1: Slightly bend track at the seam to remove, replace roller and move the door to do the next roller (repeat on other side). Method 2: Remove screws that attach brackets to your door, secure cable before releasing the bottom brackets that are under the cable spring tension, then clamp the cable to the track, slide out old rollers, place new rollers in their place and screw in backers.

The ROP Shop replacement 2" Nylon Garage Door Roller with 4" Stem & 11-Ball 6200ZZ Precision Bearing.
Specs - Roller Diameter: 1 13/16" for a 2" track. Roller Thickness: 1/2". Stem Length: 4 1/8" (3.5" from bevel). Stem Diameter: 7/16". Single Load: 150lbs. Bearing Type: 6200ZZ Precision. Roller Material: Nylon. Roller Color: White. Refer to images 2 & 3 for more information.
Rollers are constructed from nylon that is softer and quieter than plastic or metal rollers and smoother than original equipment rollers. Features a reinforced dual-wall bearing cage, sealed 6200ZZ ball bearing plus double plating thickness on stem designed for max performance and ultra-life weather protection. Garage door roller can reuse 100,000 cycles.
Installation Tips - Method 1: Slightly bend track at the seam to remove, replace roller and move the door to do the next roller (repeat on other side). Method 2: Remove screws that attach brackets to your door, secure cable before releasing the bottom brackets that are under the cable spring tension, then clamp the cable to the track, slide out old rollers, place new rollers in their place and screw in backers.