Rated 2.3 out of 5Â by 3
Rated 3 out of 5Â by Russ Prime Line N-6531 Pocket Door Roller is not an ACME replacement, and not usable on many old Tracks
Retired Design & Manufacturing Engineer
with Masters Degree in Engineering.
The Prime-Line model N-6531 Pocket Door Roller is said to be identical, or a replacement for, the very similar ACME model 85 that was popular in the 1950âs to evidently into the 1970âs or later. However, this is not true for most tracks used with the original ACME 85. The unit is simply not useable as an EXACT replacement of the ACME 85, or useable with many or most of the old tracks installed with the ACME 85 roller sets. (A very few websites will show an ACME/STANLEY model 85 is still available, but photos and line-drawings indicate that it is exactly like the Prime-Line N-6532, NOT the original ACME 85.)
The Prime-line unit appears to be even better built than the old ACME, since the rollers are spaced a bit further from the steel pivot arm on which they are mounted, and the steel frame of the unit has a slightly stronger or more stable mount against the top of the door. The ACME construction is quite satisfactory, but the Prime-Line can be said to have added stability because it has a full-length 3+1/2â long base (the steel against the door top) having mounting screw holes that are spaced 1+1/8â, compared to the ACME 85âs shorter 2+3/8â base with 1â mounting hole spacing.
The Prime-Line unit uses 7/8â diameter wheels, as does the old ACME unit. HOWEVER. the shapes of the wheels and their axles, the âbuttonâ on the outside of the axle, and APPARENTLY the DISTANCE between the wheel center or edge and the end of the axle button, (outer end of the axle) differ. The Prime-Line uses an almost flat-edged or faced wheel and a large flat button on the axle to hold the wheel on the axle. On the other hand, the ACME 85 wheel contacts the track with a more âVâ or wedge shaped wheel edge (or face), and has a rounded and possibly slightly thinner âbuttonâ on the end of the axle to secure the wheels.
Whatever the exact combination of wheel and axle shapes and dimensions, the EFFECTIVE distance from the button end of the axle to the center or edge of the flatter and wider edged Prime-Line wheel where the wheel contacts the inner edge of the track, is obviously just a tiny bit longer for the Prime-Line unit than for the ACME.
To install a pocket door with mounted rollers, the door must be tilted upwards and lifted then pulled back until both sets of wheels are inside the track. (Not necessarily an easy task.) Then the door is carefully let down to hang vertically. However, even before the door is fully down and vertical, the ends of the Prime-Line axles contact the inside of the track and start binding. When the door or rollers are hanging fully down, the wheel to axle configuration binds the axle to the track with metal-to-metal contact so tightly that the door cannot be moved without a great struggle or the use of a lever.
Unfortunately, the Prime-Line N6531 is essentially the only such unit we victims â err, customers â can find or buy now-a-days. So buy rollers and TRY them by hand, BEFORE installing them on the door. Merely tilt and insert the new unmounted Pocket Door Roller into your track. Then swing the unit back down until its base (the part of the frame normally mounted on the door), is horizontal â in other words, parallel to the floor as they would normally hang..
If you have an older house track, and possibly even on newer tracks, the Prime Line unit will usually jam even BEFORE the unit reaches its normal hanging position. If you then pull to force the Prime Line unit further to get it into its final hanging position, you can see and feel that the track is being bent by the force of the wheel outward against the outer edge of the track, versus the force of the axle end inward against the inside wall of the track. At that point the roller becomes immoveable â totally jammed. On the other hand, under the same hand-test, an old ORIGINAL ACME 85 will rotate a full 30 to 40 degrees in both directions, and remain free and easy to roll without any jamming.
Luckily I still have my old, worn, bent and beat up old ACME 85 roller set, which I will today install on my new pocket door so I I can FINALLY get this long and frustrating job done. After days of searching on the web and in stores, it is obvious that we have no other choice. My new but now dirty and un-packaged Prime Line N-6531 roller set will probably need to go into the trash.
November 15, 2014
Rated 1 out of 5Â by jack worst worst product ever
Rollers are not large enough to allow housing to clear roller track. After grinding away part of the housing the rollers still do not clear 1974 year track. I have done a lot of home repair work and this product is the absolute worst EVER !!!
October 16, 2014
Rated 3 out of 5Â by aronmcd A shoddy remake of the original Acme roller
The metal part of the roller assembly is slightly different than the original Acme roller assembly which causes the metal to scrape on the roller tract and prevents it from rolling smoothly.
October 2, 2012