Delta 17-900 Drill Press belt replacement

[StillTooManyHobbies]

Hello, after three trips to the belt supplier, I have this figured out.

Problem: my Delta 17-900 16 1/2" 12 speed chinese drill press ruins its belts.

This model number has 3 versions, USA I think, Taiwan and China. I found pictures of one from 1995 and it was Taiwan. Mine is 1999 and it is China. Mine is 250 to 3000 rpm. All have the same belt set number listed as 1312030, which includes 1/2" belts in A25.5 and A27 sizes. The smaller belt goes on the motor end, and the longer one goes on the quill end. These belts do not fit all the way in the pulley grooves on mine and eventually will delaminate.

I think this drill press was sold under other brand names and they might have used the metric M26 and M27 10mm belts, but I now have a 3L260 and a 3L270 and the fit in the grooves and the motor adjustment will accommodate all the different belt and pulley combinations.

An alternate choice might be 15 series automotive belts using 15255 and 15265 belts, but I have not actually tried these.

I hope this helps someone else out there as I saw in the Delta belt reviews that other people have a belt delamination problem with this drill press.

STMH

 

[6PTsocket]

Hello, after three trips to the belt supplier, I have this figured out.

Problem: my Delta 17-900 16 1/2" 12 speed chinese drill press ruins its belts.

This model number has 3 versions, USA I think, Taiwan and China. I found pictures of one from 1995 and it was Taiwan. Mine is 1999 and it is China. Mine is 250 to 3000 rpm. All have the same belt set number listed as 1312030, which includes 1/2" belts in A25.5 and A27 sizes. The smaller belt goes on the motor end, and the longer one goes on the quill end. These belts do not fit all the way in the pulley grooves on mine and eventually will delaminate.

I think this drill press was sold under other brand names and they might have used the metric M26 and M27 10mm belts, but I now have a 3L260 and a 3L270 and the fit in the grooves and the motor adjustment will accommodate all the different belt and pulley combinations.

An alternate choice might be 15 series automotive belts using 15255 and 15265 belts, but I have not actually tried these.

I hope this helps someone else out there as I saw in the Delta belt reviews that other people have a belt delamination problem with this drill press.

STMH

The A and L sizing systems are not directly interchangeable for length. The A system measures belt inside length and the L system measures the outside. The difference varies with belt width. A/4L are 1/2"wide and the difference from inside to outside length is 2". An A13 is a 4L150. The A,B,C system starts at 1/2" width. The L system goes lower. There are 2L and 3L and maybe 1L belts. The L belts are designed for fractional horse motors, like your drill press. The A,B,C belts are for higher power, like cars. In practice you can use A,B, belts with small motors but I would try it the other way around.

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[6PTsocket]

The A and L sizing systems are not directly interchangeable for length. The A system measures belt inside length and the L system measures the outside. The difference varies with belt width. A/4L are 1/2"wide and the difference from inside to outside length is 2". An A13 is a 4L150. The A,B,C system starts at 1/2" width. The L system goes lower. There are 2L and 3L and maybe 1L belts. The L belts are designed for fractional horse motors, like your drill press. The A,B,C belts are for higher power, like cars. In practice you can use A,B, belts with small motors but I would not try it the other way around.

Sent from my SM-G900V using Tapatalk

I

Sent from my SM-G900V using Tapatalk

 

[seber]

Delamination of belts is usually caused by misalignment. See if you can adjust the sheaves for better life.

 

[mhejl]

My Delta DP from the late '80s had 2 A15 belts. Modern A15 belts are too short and won't fit - I tried several brands, Solution: Power Twist link belts, just over 4 feet worth. I've never seen these delaminate, even back in the days I worked in the oil field.

 

[StillTooManyHobbies]

Thanks for the info guys. The original 1/2 A series belts never fit into the pulleys properly.

@6pt, I knew about the sizing differences, in the numbering schemes, but the 3L fit deeper in the pulley and therefore ended up shorter than the A series belts.

@seber, I checked alignment, and the center pulley was about 1/8" low. I put in a spacer, and now they are about even. Also, the edges of the pulley where it stepped up to the next size was SHARP, and probably did not allow the belts to deform into the pulley, but cut them. I filed a roundover on them.

Working better now! Thanks again to all. STMH